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ACHU - Active Cooling & Heating Unit

All in one precisely controlled heater and cooler unit designed for accurate temperature control.




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ACHU is a precisely controlled heating and cooling device for robotic workstations and benchtop applications. The temperature range is between 0°C and 99°C and has a cooling & heating accuracy of ±0.1 °C. It offers the best performance for scientific laboratories. The SBS footprint on the bottom allows easy docking and it has a wide variety of easily changeable adapters for different tubes and plates.

All-in-one design

It needs only 2 cables, the power cable, and the USB-C cable to start your protocol. Our optimized heating and cooling algorithm in combination with a unique heatsink design enables us to run Peltier elements at the highest performance and assures long life and accuracy. With 15 Kelvin/min cooling performance, ChillPlate is one of the fastest of its class.

Software integration is easy. Command lines are simple and constant data flow is ensured between hardware and communication via USB. There is a simple UI for benchtop use and calibration performing.

Changeable Adapters

The unique design makes it easy to change adapters without any help from a tool. A wide variety of standardized and custom adapter blocks are available. We have a Hybrid ChillBlock option for larger tubes and adapters for the best performance and speed.


We gather years of experience and develop the most reliable product that will improve your efficiency. Our products are engineered, manufactured, and tested in Estonia. We globally support our customers and offer a two-year warranty globally.


As a turnkey solutions provider, we offer the full process chain from concept, through prototyping, development, production, installation, and after-sales service. The interdisciplinary in-house team of designers, engineers, and software experts, keeps Ariumlab constantly ahead of its competitors and assures attractive lead times and cost-effective solutions

For your specific needs and applications, we can build customized devices according to your requirement and business needs. Our design team and specialist are always available to help you achieve the best results.

Please contact us for your customized needs such as under deck integration, more optimized space, performance, and multiple ACHU control.

Specifications – Temperature

Temperature range -4°C to 99°C *
Temperature setting 0°C to 99.9°C . 0.1°C increment
Temperature accuracy ±0.1°C
Cooling Speed 15 K/min above 21°C
Heating Speed 12 K/min below 21°C

Specifications – Electrical & Dimensions

Operating Voltages 24 VDC - 120 Watt
User interface USB 2.0
Dimensions WxDxH 137mm x 94mm x 94mm
Weight 2.2Kg
Operating range +5°C to 45°C (80 % max. R.H)



Precise temperature control is critical for successful molecular diagnostic assays. Cooling and heating technologies, such as thermal cyclers and temperature-controlled incubators, are essential for achieving accurate and reliable results in molecular diagnostics.

Why cooling and heating is important for molecular diagnostics:

  1. Enzyme activity: Many molecular diagnostic techniques rely on enzymes, such as polymerases, ligases, and restriction enzymes, to catalyze reactions. Enzymes are susceptible to temperature, and their activity can be affected by even small changes in temperature. Therefore, it is important to carefully control the temperature during the reaction to ensure optimal enzyme activity.
  2. Stability of reagents: Some reagents used in molecular diagnostics are sensitive to temperature and can degrade over time if not stored at the proper temperature. For example, Taq polymerase, a commonly used enzyme in PCR, is sensitive to heat and can lose activity if not stored properly.
  3. Reproducibility: Accurate temperature control is essential for ensuring the reproducibility of results in molecular diagnostic assays. Even slight variations in temperature can lead to differences in reaction efficiency, yield, and specificity, which can affect the accuracy and reliability of the results.


ACHU unit has 2 thermoelectric coolers that are controlled by a PID controller.

A thermoelectric cooler, also known as a Peltier cooler, is a device that uses the Peltier effect to transfer heat from one side of the device to the other. When an electric current is applied to the semiconductor material, heat is absorbed on one side of the material and released on the other side, creating a temperature difference. This temperature difference can be used to cool the side of the device that absorbs heat, making it useful in a variety of applications such as refrigeration, air conditioning, and electronic cooling.

Thermoelectric coolers have several advantages over traditional cooling methods, such as no moving parts, silent operation, and miniaturization, making them ideal for use in portable or compact devices. However, they also have some limitations, including lower cooling capacity and efficiency compared to other cooling methods.

What is important when choosing the right product?

Temperature Accuracy

Maintaining temperature accuracy involves achieving precise and consistent temperatures that are reproducible throughout the entire duration of the run, and for every sample contained within the block.

Temperature Uniformity

The temperature should be consistent throughout the block, producing the same outcomes for samples located at the center or on the periphery of the block, as well as during the entire operation.

Size of the Unit

The unit should have slightly bigger than the footprint of an SBS format plate and the height should be optimal for pipetting tips to reach.

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Address: Kopli 25 507/A, 10412 Tallinn ESTONIA

Registry: 14358662 VAT# EE102054844

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