Block Heaters

Benchtop units Block Heaters

Thermomixers
Block Heaters
Laboratory Shakers
Magnetic stirrers
Laboratory Water baths overview

Block heaters provide sample temperature control in interchangeable blocks without shaking — a cost-effective alternative to thermomixers for pure temperature applications such as enzyme inactivation or denaturation. The range extends from simple models with heating only (from €400.00) to models with cooling and heating functions (from €2,343.00), featuring one to four interchangeable blocks.

Block Heaters / Block Heaters (heating only)

Block Heaters / Block Heaters for cooling and heating

Block Heaters: Selection Criteria and Model Overview

Block heaters perform pure temperature control without shaking — the right choice when a sample must be kept at a constant temperature without movement. Typical applications include the inactivation of enzymes after a reaction, the denaturation of proteins or DNA, as well as thawing and pre-warming reagents. Compared to a thermomixer, block heaters have a simpler design and are consequently more cost-effective.

Block Heaters with Heating Only

For standard applications without cooling requirements, a wide range of models with heating only is available: from the simple analogue HB1AL (€510.00) to digital models with touchpad operation and acoustic alarm (HB1DG, HB2DG, €755.00–€965.00) and the programmable Crystal series for 1, 2, or 4 blocks (€400.00–€940.00, including anti-condensation lids). The compact AccuBlock Mini is suitable for very small sample volumes (temperature range RT+5°C to 100°C, for 12×1.5 ml). The TH 21 offers 2 interchangeable blocks with simple Easy-Control operation without programming function (€1,472.00).

Block Heaters with Cooling and Heating

If samples must also be tempered below room temperature — for example, for direct cooling after a heating step — cooling and heating block heaters are available: the programmable TK 23 for 2 interchangeable blocks (€2,343.00) as well as the cooled thermomixer AccuTherm as a base unit without block.

Block Exchange and Operating Concept

Several models offer tool-free block exchange — relevant for laboratories that frequently switch between different vessel formats. Operation ranges from simple analogue controllers to digital touchpad controls with acoustic alarms and fully programmable temperature profiles.

Frequently Asked Questions about Block Heaters

The most important questions regarding the selection between different models and the distinction from thermomixers.

What is the difference between a block heater and a thermomixer?

A block heater controls the temperature of the sample without shaking. A thermomixer combines temperature control with continuous mixing. If the sample does not need to be moved during incubation, a more affordable block heater is sufficient.

Do I need a programmable model or is simple control sufficient?

Simple control (analogue or digital without programming) is sufficient if the same temperature is always maintained for a fixed time. Programmable models are worthwhile if different temperature profiles are changed frequently or if multi-stage temperature programmes are to be run.

When do I need a model with a cooling function?

A cooling function is required if samples are to be cooled down to low temperatures directly in the device after a heating step, or if protocols require temperatures below room temperature.

What does tool-free block exchange mean?

For models with tool-free block exchange, the interchangeable block can be replaced without a screwdriver or other aids — practical for laboratories that frequently need to switch between different vessel formats.