TDC modules

TDC modules

TDC modules (modular time-to-digital converters/time taggers)

Description
Downloads
FAQ

This is our TimeTagger technology in miniature. Use these modules to integrate time recording functions into your product design!

The compact TDC modules from cronologic provide a practical solution to the challenge of significantly reducing space requirements in measurement setups and analyzers without sacrificing performance and accuracy.

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The evolution of the time domain in measurement technology

Measurement technology in the time domain has made significant progress in recent years, particularly in the development of new analog-to-digital converters and time-to-digital converters (TDC). The precise acquisition of timing information is critical in a variety of applications, be it medical imaging, laser range finding, or high-frequency signal analysis. As part of the new TimeTagger generation, cronologic has developed particularly spacious TDC modules that can be integrated via a customer-specific analog front end.

The timestamps of leading or trailing edges of digital pulses are recorded from the TimeTagger TDC modules with the following quantization (bin size):

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• TimeTagger4-1.25G module: 800 ps

• TimeTagger4-2.5G module: 400 ps

• TimeTagger4-5G module: 200 ps

• TimeTagger4-10G module 100 ps

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Benefit from the advantages of modularity!

With their size, cronologic's TDC modules are extremely compact and take up only a fraction of the space of our PCIe boards. This enables integration into small, powerful devices without restricting their performance. Thanks to their small format, the modules open up new possibilities for the acquisition of precise time information in various areas of research and development.

Despite their small size, cronologic's TDC modules offer exceptional time resolution and accuracy. They can measure extremely short time intervals with precision, which is crucial for many demanding measuring applications. These small modules are particularly advantageous when cost savings are at the forefront of integration. Using modular circuits can reduce your development costs as you can use proven modules instead of developing complex circuits from scratch.

The integration of TDC modules into existing systems is easily done via a customer-specific analog front end. Not only does this save time in development and allow you to get to market faster, but you can also customize and expand your devices according to your research or application requirements.
In particular, this is an advantage as requirements and technologies in the time domain are constantly evolving. The TDC modules are connected to your board via board-to-board connectors, using differential input signals for your analog front end. We will be happy to provide you with detailed information in this regard.

One of the outstanding features of our new TDC modules is their modularity. It is possible to use modules with exactly the optimum performance parameters for different applications, even if the same analog front end is used. Furthermore, in the event of defects or upgrades, modules can simply be replaced without having to replace the entire measuring device. This saves time and money when maintaining and updating devices.

We primarily offer our TDC modules to customers who order larger quantities to integrate them into their series production. For price information, please contact us with details of your current forecast.

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All TimeTagger4 TDC modules can be installed via board-to-board connectors with minimal hardware effort.

Space-saving installation

All TimeTagger4 TDC modules can be installed via board-to-board connectors with minimal hardware effort.
Our TimeTagger4 TDC modules are the perfect choice if you are looking for picosecond resolution at the best possible price/performance ratio.

Integrate at minimum cost

Our TimeTagger4 TDC modules are the perfect choice if you are looking for picosecond resolution at the best possible price/performance ratio.
TDC modules can be combined with a wide range of detectors or constant fraction discriminators (CFD) as their threshold discriminators utilize positive or negative thresholds with configurable voltage.

Bipolar design

TDC modules can be combined with a wide range of detectors or constant fraction discriminators (CFD) as their threshold discriminators utilize positive or negative thresholds with configurable voltage.
Control your device with periodic pulse patterns, the exact timing of which is measured by the TDC. You can use any input channel of our module to output these pulses.

Use the TiGer timing generator

Control your device with periodic pulse patterns, the exact timing of which is measured by the TDC. You can use any input channel of our module to output these pulses.

TDC modules

Data

Optimized for
ADC channels
TDC channels
Gating channels
Connectors
Sample rate single channel
Sample rate multi channel
Resolution
Maximum bandwidth
TDC bin size
TDC double pulse resolution
Multihit
Dead time between groups
TDC readout rate
ADC readout rate
Timestamp range
Common start/stop
Number of boards that can be synced
Readout interface
Time base
On-board calibration data storage
Adjustable trigger windows
Overlapping events possible
Easy to use Windows C API
In-system firmware update
Linux support available
No items found.

TDC modules

- Data

Optimized for
low cost & space-saving
1 start & 4 stop channels
-
board-to-board
800 / 400 / 200 / 100 ps
2 bins
1000x per start event
none
min. 60 MHits/s total; 40 MHits/s per channel
1,67 ms / 430 ms extended
yes / no
no sync possible
PCIe2 x1 @ 400MB/s
external high quality time base required
TDC channels
Additional inputs
Connectors
bin size
Double pulse resolution
Multihit
Dead time between groups
Readout rate
Timestamp range
Common start/stop
Number of boards that can be synced
Readout interface
Time base
Linux support available
yes
low cost

Ndigo Crates

Our Ndigo Crates allow for using up to 8 PCIe-boards with a conventional PC. The external chassis is connected employing a  PCIe2 x16-interface.

Analog to Digital Converters

Connection to host
Bandwidth to host
Performace relative to
10 Gbps Thunderbolt link
PCIe2 16x slots with 8 lanes
PCIe2 16x slots with 4 lanes
PCI slots 5 V, 32 bit, 33 MHz
PCI slots 3 V, 32 bit, 66 MHz
Cable and link boards
Crate5
Crate3
Crate
PCIe3 x16
8 GByte/s
16x
2
3
2
0
included
PCIe3 x16
8 GByte/s
16x
2
3
0
2
included
PCIe2 x16
8 GByte/s
8x
0
8
0
0
included

Applications:

FLIM

(fluorescence-lifetime imaging microscopy)
The decay time of an excited fluorophore is typically in the range of a few nanoseconds. In fluorescence lifetime imaging the exponential decay of a sample is determined requiring a timing resolution in the picosecond regime.

LIDAR

also known as: LIDAR, LiDAR, and LADAR, "light detection and ranging", "laser imaging, detection, and ranging", "3-D laser scanning", "LIDAR mapping", "airborne laser scanning", ALS
LIDAR Systems emit ultraviolet, visible, or near-infrared light to image objects and measuring the time-of-flight (TOF) of reflected photons. Such systems are used for object detection and tracking in many different fields, ranging from archaeology to agriculture, autonomous vehicles and robots etc.

OTDR

optical time-domain reflectometry, optical time-domain reflectometer, remote fiber testing
In optical time-domain reflectometry the time of the reflections is determined from the reflection loss by measuring from the same end of the fiber how much light returns via the Rayleigh backscatter or is being reflected from individual locations along the fiber.

Quantum Sensing

see also: quantum metrology
Quantum sensing is an overall term that encompasses techniques and methods that use quantum mechanical phenomena to make precise measurements of physical quantities. Thereby, quantum mechanical states and effects are used to improve the measurement accuracy beyond the limits of classical sensors.

TOF mass spectrometry

TOF- & MASS- spectroscopy detectors, TOFMS
In many TOFMS units cronologic TDCs are used to measure precisely the arrival of single ions. From the arrival time, the ion’s time-of-flight is deduced, from which the mass-to-charge ratio of the detected particle can be determined.

Time Domain Reflectometry

TDR, distance-to-fault, DTF
TDR (Time Domain Reflectometry) is an electronic measurement method that measures reflections along a conductor. It belongs to the category of Distance-to-Fault (DTF) measurements. TDR measurements provide meaningful information about the broadband behavior of transmission systems.

Time-Correlated Single Photon Counting

TCSPC, photon counting, time-correlated single photon counting, detection of individual photons, single-photon detectors (SPD), photosensors
Whether in astrophysics, materials science, quantum information science, quantum encryption, medical imaging, DNA sequencing or in fiber-optic communication: Single-photon detectors (SPD) provide a timing signal from which, for example, fluorescence lifetimes of excited matter can be deduced.

fluorescence lifetime correlation spectroscopy

FLCS, FCS, fluorescence lifetime correlation spectroscopy
Fluorescence-correlation-spectroscopy is a highly sensitive optical measurement method. Fluctuations in the fluorescence emission intensity over time are recorded, which are caused by individual fluorophores that pass through the detection volume.

phase shift measurements

frequency and phase shift measurements, phase-noise-analyzers
In phase measurements the phase of an incident signal is compared to the phase of a device's response signal. With increasing frequency, such phase shift measurements become more challenging. cronologic TDCs provide many features which help to address this difficult task.

quantum research

Quantum research affects many areas of modern science: quantum cryptography, quantum information science, quantum encryption, quantum key distribution (QKD), quantum electro dynamics (QED), quantum computing etc.
Quantum phenomena such as superposition, uncertainty, and entanglement are studied in quantum research with the goal that they can be safely fabricated when needed and made useful in various disciplines.

spectral imaging

spectral image acquisition, X-ray, radiology, photon-counting computed tomography, microscopy, hyperspectral imaging
The currently most advanced spectral imaging technique is based on single photon-counting detectors. Such detectors typically require precise timing measurements and corresponding applications strongly benefit from fast data acquisition electronics.

Here you find all current downloads for this product. Please contact us for further support on our ADCs and TDCs.

Frequently asked Questions

product choice

I have no idea whatsoever which measuring card is suitable for my application. Can you advise me on this?

We would be happy to assist you in selecting a board for your application.

For this purpose we need the following information:

How many measurement channels are needed?

What is the required time resolution?

Do you want to measure the area, intensity or shape of the pulse? Or is the time of occurrence sufficient?

Do you prefer a PCIe CEM card housed in a PC, or do you prefer an external device connected to a Thunderbolt / USB4 port?

Are you aiming for the most space-efficient data acquisition integration possible?

Regarding your timeframe, are you only interested in products that are available now, or are you also interested in upcoming products or custom solutions?

The best way would be for you to use one of our inquiry forms and fill it out completely.

input level

In which level should the signals I use range, which I feed to the inputs of the measuring cards?

Please refer first and foremost to our information in the User Guide for the respective product. The following technical specifications are subject to change without notice.

  • Our standard TDCs are AC coupled. The DC base line can be between 0V and 5V for these devices. Short positive and negative pulses with an amplitude of up to 5V can be processed. The discriminator threshold can be set between -1.32V and 1.18V relative to the DC baseline, with a step size of 40 µV. In general, the threshold voltage should be set well above the noise level of the input signal.
  • The inputs of our standard ADCs are AC-coupled single-ended analog inputs. The maximum input voltage is 0.5 V and the input impedance is 50 Ω. The analog offset can be between -0.25 and +0.25 V.

constant fraction discriminator

Do the cronologic measurement cards offer an integrated CFD (Constant Fraction Discriminator)?

Since our measurement boards are designed for a wide range of applications, we do not integrate CFDs into our standard models. In principle, however, it is of course possible to operate our boards with external CFDs, which is also done by many of our customers. The threshold function (threshold comparator) is in most cases already sufficient to pre-sort the pulses on the input side. This is because the digital threshold is adjustable for each input and can alternatively be configured for positive or negative pulses. Please refer to the operating instructions for more information.

In case extremely high demands are made regarding the comparator, an external device may be used.

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TDC integration

How can I integrate cronologic TDCs into my measurement setup in a reasonable way?

In addition to using the PCIe interfaces of our measurement boards, the integration of our TDC modules can be considered for the TimeTaggers. The TDC modules are connected to your board via board-to-board connectors, using differential input signals for your analog front end. We will be happy to provide you with detailed information in this regard.

Alternatively, before purchasing an xTDC4-PCIe respectively TimeTagger, consider supplementing the TDC with our TBT2PCIe enclosure, which allows data transfer via USB4 using conventional Thunderbolt cables.

The xHPTDC8-PCIe is integrated exclusively via its PCIe interface.

bin size, jitter and RMS

How are bin size, jitter and RMS error related?

The bin size, jitter, and RMS measurement error are all important parameters that play a role in the digital acquisition of time data.

  • The bin size refers to the width of the time windows into which the data is divided during the measurement. The smaller the bin size, the higher the temporal resolution of the measurement. However, if the bin size is too large, there may be an overlap of data between each time window, resulting in an inaccurate measurement.
  • Jitter refers to the deviation in the time it takes for data to arrive at each time window. When jitter is high, data in a circuit can be erratic or inconsistent, resulting in an inaccurate measurement. Jitter is not directly related to bin size and therefore cannot be calculated directly from it. Jitter can be considered as the measure of the temporal variability of the acquired signal edges.
  • The RMS measurement error refers to the average deviation between the actual values of the input data and the values generated by the measurement. The lower the RMS measurement error, the more accurate the measurement.

TimeTagger dead time

What has to be considered with regard to the dead time respectively the input frequency for the TimeTaggers?

The term dead time refers to the time lag or time offset that can occur when measuring with a TDC. The dead time specified in technical data of TDCs and the input frequency refer to the same parameter and are directly dependent on each other. An input frequency of 200 MHz, for example, corresponds to a double pulse resolution of 1/5 ns.

The extent to which this value is relevant for your measurement depends on the sensors used. Only in case the dead time of your sensors is extremely small and a high resolution is required, this value will be relevant for you.

The TimeTagger measures start and stop with the same resolution and bandwidth. Thus, starts at the distance of the double pulse resolution are also handled correctly - the dead time thus corresponds to the double pulse resolution in practice.

common start

What is the key feature of a common start TDC?

Common Start TDCs, such as our TimeTagger or the xTDC4 provide a list of time stamps relative to a common start signal. This means the timestamps reflect the time difference between the start signal and the pulse measured on another TDC channel. The start signal must temporally precede the pulses being measured.

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delay function

What are the capabilities of the delay function of the TimeTagger's input signals?

The user can implement user-defined delays on the measured time stamps in the software of the TimeTaggers. The input signals can be shifted with 200ps resolution in a range of approx. 200ns.

The xTDC4-PCIe features no input delays. However, after the common start group has been formed by the hardware, your software can implement any delays for the events present in the group.

Continuous Mode

What is the function of Continuous Mode and how is it implemented?

The current TimeTaggers offer a Continuous Mode. In this mode, the device continuously records stop signals even without a start signal connected. The data stream periodically contains packets with absolute 64 bit timestamp, followed by a list of stops relative to this timestamp. The period of the timestamps can be customized to fit the used evaluation interval.

The config.tdc_mode parameter is used for this purpose, which switches between grouping and continuous. Only grouping is supported, so that the evaluation of the data stream in continuous mode is performed by the evaluation software used.

Please note: The previous generation TimeTaggers (TimeTagger4-1G and TimeTagger4-2G) do not offer Continuous Mode.

multiple TDC channels

How does the use of multiple input channels affect the performance of my card?

The data acquisition of our TDCs is based on PCIe DMA. Thereby the maximum utilization of the data rate will in some cases only be reached if solely one measuring channel is used. In our technical data you will find the readout rate, which describes the maximum value and also the readout rate for the use of individual channels.

You are welcome to explain your application to us in detail, so that we can work out together how you can exploit the performance of our product to the maximum.

pulse width measurement

Do TDCs only provide the arrival time of incoming pulses or also the pulse width?

Since the pulse amplitude is not measured when using TDCs, in many applications a derivation of the pulse intensity from the pulse width comes into question. In these cases, it may be useful to measure the pulse width as well as the arrival time of the pulse. For the acquisition of single photons, however, this is usually not necessary.

The measurement of pulse widths (i.e., a simultaneous measurement of falling and rising pulse edges) is feasible in most cases, but the specifics depend on the type of card in use.

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  • The cronologic TimeTaggers are optimally suited for capturing the arrival time in conjunction with the pulse width. They provide (if enabled) timestamps of both the rising and falling edges of the measured pulse. The time difference corresponds to the pulse width.
  • Pulse width measurement is also possible with the xTDC4-PCIe, though it is more involved.
  • The integrated TDCs of the Ndigo5G-10 and the Ndigo6G-12 are also capable of capturing both edges of the pulse.
  • The xHPTDC8-PCIe captures only one edge per pulse, so the pulse width cannot be obtained with this device.

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TiGer

What exactly is the function of the TiGer (timing generator)?

To use inputs to output arbitrary periodic pulse patterns for controlling your setup, you can write your own software that allows exact measurement of the timing of these patterns with the TDC. The TiGer can be used to measure exact timing differences between the generated output signals and various input signals on other channels. This is useful for a variety of applications.

The TiGer functionality can be configured independently for each port. Each TiGer may connect its output to the corresponding LEMO port. This turns the port into an output. The TiGer is DC-coupled to the connector. Connected hardware must not pass signals to the ports used as outputs, as this could damage both the TDC and the external hardware.

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firmware updates

Is it possible to update the firmware of my cronologic product by myself?

Yes, a corresponding program for updating the firmware is part of the driver package for our cards. Caution: Each firmware update requires a new calibration of the card using the provided calibration software. In some cases, it is necessary to provide appropriate input signals for this purpose.

driver download

Where can I find the appropriate driver for my cronologic product?

On the pages containing product information, there is a corresponding tab. Plus on this website, all downloads for our products are listed. This also applies to products that are no longer in our current range.

For Linux support please use this page.

MATLAB

Is it possible to use the cronologic DAQ boards with MATLAB based software?

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We provide a C API that can be used to receive a stream of timestamps in almost any programming language. Histogramming and other analysis of the timestamps can be programmed by the user in a few lines of code.

We do not provide a separate interface to MATLAB. Basically, our drivers are intended to be used either directly in C/C++ programs or, when used in other languages, with a C/C++ wrapper that provides the driver's functions in the respective language and converts the data to the respective data format.

Matlab probably offers several ways to use C++ classes. This seems to be a viable way, although it is not trivial.

Another possibility is demonstrated here.

By the way: For basic applications that are rarely called, there is another way to solve the problem as the driver of our measuring cards offers a tool which records the data into a .csv file. This can then be analyzed in MatLab or also Excel. However, the amount of data generated is quite large, so you have to make sure in your own code that the data is really processed in real-time.

golang

Is it possible to use the cronologic DAQ boards with Go based software?

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We provide a C API that can be used to receive a stream of timestamps in almost any programming language. Histogramming and other analysis of the timestamps can be programmed by the user in a few lines of code.

We do not provide a separate interface to Go / Golang. Basically, our drivers are intended to be used either directly in C/C++ programs or, when used in other languages, with a C/C++ wrapper that provides the driver's functions in the respective language and converts the data to the respective data format.

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Julia

Is it possible to use the cronologic DAQ boards with Julia based software?

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We provide a C API that can be used to receive a stream of timestamps in almost any programming language. Histogramming and other analysis of the timestamps can be programmed by the user in a few lines of code.

We do not provide a separate interface to Julia. Basically, our drivers are intended to be used either directly in C/C++ programs or, when used in other languages, with a C/C++ wrapper that provides the driver's functions in the respective language and converts the data to the respective data format.

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LabView

Is it possible to use the cronologic DAQ boards with LabView based software?

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We provide a C API that can be used to receive a stream of timestamps in almost any programming language. Histogramming and other analysis of the timestamps can be programmed by the user in a few lines of code.

We do not provide a separate interface to LabView. Basically, our drivers are intended to be used either directly in C/C++ programs or, when used in other languages, with a C/C++ wrapper that provides the driver's functions in the respective language and converts the data to the respective data format.

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Rust

Is it possible to use the cronologic DAQ boards with Rust based software?

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We provide a C API that can be used to receive a stream of timestamps in almost any programming language. Histogramming and other analysis of the timestamps can be programmed by the user in a few lines of code.

We do not provide a separate interface to Rust. Basically, our drivers are intended to be used either directly in C/C++ programs or, when used in other languages, with a C/C++ wrapper that provides the driver's functions in the respective language and converts the data to the respective data format. Wolfgang Löffler has created Rust bindings for our drivers. He has published code on GitHub under the Mozilla Public License that shows how to use TimeTagger4 and HPTDC8 with Rust. It should be easy to port this code to the xTDC4 and xHPTDC8 in case.

Linux

How can I use cronologic hardware most efficiently in Linux environment?

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Our Linux-Supportweb page provides drivers and support for GNU/Linux based applications. ‍Please provide us with information about your application and the driver requirements for your Linux distribution and kernel version. Please note that only kernel versions from 5.0 (March 2019) are supported.

Python

Is it possible to use the cronologic DAQ boards with Python based software?

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We provide a C API that may be used to receive a stream of timestamps in almost any programming language. Histogramming and other analysis of the timestamps can be programmed by the user in a few lines of code.

In principle, the use of Python based software is possible along with wrappers. Our customers write their own wrappers suitable for their particular application. For example, there is a Python wrapper for the HPTDC8.

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trigger

My product development respectively my experiment requires a trigger that I want to use as a start signal. Which TDC is best for me?

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In this case, we recommend one of our Common Start TDCs, such as the xTDC4, TDC modules or one of our TimeTaggers.

infinite stream of timestamps

I want to capture an infinite stream of timestamps instead of time differences related to a common start signal. How can this be performed?

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This function is not supported by common-start TDCs. Therefore, in this case we recommend using our xHPTDC8-PCIe, which has been optimized for this application.

defense

The company I work for is also closely associated with suppliers operating in the defense sector, or we produce military products ourselves. Is cronologic willing to supply us?

As part of our own sales policy, we would like to ensure that our products are not used in weapons systems. If you are considering purchasing our ADCs or TDCs, please let us know how you can ensure that the use of our products for military purposes can be reliably excluded.

ordering process

How exactly does the ordering process work at cronologic?

  • Usually, you will receive an informal message from us in advance of your order with the current prices of the requested items.
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  • In case of interest, we will provide you with an official quote, in which any freight costs or insurance costs, etc. are also taken into account. If the desired item is in stock, we will schedule two weeks for final quality control, calibration, and preparation for dispatch.
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  • As soon as we have received your order, we will send you an order confirmation. The item is thereby reserved for you.
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  • In the next step, we carry out a final in-house check and calibrate the product.
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  • Your invoice will only be issued when the goods are dispatched and your payment term is 14 days as standard. Depending on the selected shipping method, payment is therefore also possible after receipt of the goods.
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  • You will receive your invoice by email and also with the shipment. Together with the invoice, you will receive the consignment note with the tracking number, which you can use to track the shipment if required.
  • Advice for urgent orders: Specifying the exact person who is to receive the goods can be helpful to ensure that the receipt of your goods is registered promptly. We will take this information into account when sending the goods.

formal quote

What do I need to do to get a formal quote?

Please provide us with the following information:

  • Details of the quantity of the desired cronologic products
  • if necessary, information about the desired delivery date
  • Your complete billing address and delivery address including the telephone number of your head office
  • If your billing address is in the European Union: Your VAT number
  • Your FedEx or UPS customer number. Please inform us immediately if you do not have one.
  • Information about your transport insurance. Please inform us immediately if you do not have one.

shipping insurance

Are the goods covered by insurance when they are shipped ?

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We ship fully covered unless you specifically tell us that you have external insurance and therefore would not like us to do so.

shipments

How do we ship your goods?

We ship your goods via FedEx or UPS through your account. Thus you have full control over the shipping costs and can use your own conditions with the shipping company. In case you do not have a FedEx or UPS account, we will ship your order via our own UPS account and show the shipping costs separately on your invoice or within our offer. Please note that this procedure usually leads to significantly higher shipping costs. It is financially more worthwhile for you to open a new FedEx or UPS customer account - especially because you can then take advantage of the new customer offers of these shipping companies.

FCA incoterms

What does shipping to FCA Incoterms mean?

The International Commercial Terms are clauses for the interpretation of commercial contract standards. FCA (Free CArrier) is one of the clauses, which exclude the assumption of the costs for the main transport by the seller. In this case, cronologic takes over the handover to the carrier and, if necessary, also the customs declaration.

delivery restrictions

Are there any restrictions regarding the delivery of measurement cards to certain countries?

Our ADCs are classified as so-called dual-use goods, as they could be used for military purposes in addition to civilian applications. TDCs and Crates are not affected by these restrictions.

Regardless of the fact that we at cronologic want to exclude the use of our products for military purposes, the laws of the EU and many other countries restrict exports. Since we have to apply for a General Export Permit for these countries, delivery processes may be delayed or delivery to certain countries may become impossible.

For the application of this export license we need the following documents from you:

  • Exporter declaration
  • Company profile
  • Gegbf. import license (country dependent)

There are countries for which a general export license can be used for the export of dual-use goods. In this case we need documents from you and there will be no further delay:

These include:

  • Australia
  • Japan
  • Canada
  • Liechtenstein
  • New Zealand
  • Norway
  • Switzerland
  • Singapore
  • USA

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goods dispatch

How long does it take to receive my ordered goods?

Provided that the ordered goods are products from our standard portfolio and are in stock, it can usually be assumed that the delivery will be dispatched within 14 days after receipt of the order. During this time, the item is subjected to a further detailed calibration and final inspection, packed and made ready for dispatch. Of course, it is always a requirement that all details regarding customs and shipping have been clarified in advance.

import permit

For which purpose is an import permit required and where can I get it?

Governments may impose certain restrictions on the imported goods as well as on their quantity. As a result, import licenses may be required. Such an import license is a document issued by a national government that allows certain goods to be imported into its territory. This is the international import document IC, which you may need to apply for at your customs office. Each import license specifies the quantity of imports allowed, and the total quantity allowed should not exceed the quota.

You need our export declaration to apply for an import permit.

Please find more information on the WTO website.

reseller

We are resellers and need sufficient margin for our services. Can cronologic help us with this?

As a matter of principle, yes, this is possible. In the run-up to our collaboration with companies that consider themselves resellers, we examine their business model in detail. This will take some time. Please provide us with comprehensive information about your company respectively your corporate group, your customers and the complete scope of your product range.