Kryoheater Selecta

Kryoheater Selecta

Kryoheater Selecta

Process thermostat for energy-saving professional temperature control in the working range of -90 up to 200 °C

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LAUDA process thermostats of the Kryoheater Selecta (KHS) series ensure high-performance temperature control at high energy efficiency and reliability. The compact device construction provides a long service life and maintenance friendliness.

Corresponding to the lowest working temperature, two-stage compressors (up to -60 °C) and/or cascade cooling systems (up to -90 °C) are used. The condenser is cooled by means of cooling water. The cooling capacity is controlled continuously and precisely by injection control. A step switch ensures energy-saving and low-wear partial load operation using an automatic compressor system. By means of the electric heating, Kryoheater Selecta can cover an operating temperature of up to 200 °C.


  Your advantages Your benefits
  • Powerful pump (flow rate 85 L/min max. pressure 5.5 bar max.)
  • Magnetic coupling
  • Integrated frequency conversion
  • Pressure limitation
  • High volume flow even in case of pressure loss
  • No sealing problems at the pump shaft as it is hydraulically sealed
  • Highly precise user-specific speed control (40 to 100 percent)
  • Protection of the consumer against excess pressure
  • Nitrogen overlay of the expansion vessel
  • Pressure-resistant expansion vessel made of stainless steel
  • No condensation of the air humidity
  • No odours
  • No evaporation and no oxidation of the heat transfer liquid
  • Enables larger operating temperature range of the heat transfer liquids
  • Automatic on/off of the second refrigeration step for KHS 2190 W (cascade cooling up to -90 °C)
  • Up to 50 percent energy conservation in applications over -20 °C
  • Protection class IP 54
  • Robust construction using steel frames
  • Industrial control cabinet
  • Safe, reliable and long-term use in production environments
  • Protection of the control against all environmental influences, such as dust, dirt, liquids and touch
  • Simple maintenance and service by ideal accessibility to all components
  • PLC control (programmable logic controller)
  • 7" touch panel
  • Detailed display of parameters
  • Visualisation of alarm and error messages
  • Extensive data exchange with process control systems
  • Intuitive operation
  • Quick analysis of process data
  • Identification of disturbance variables
  • Use of a refrigerant with low global warming potential (GWP* < 2,500)
  • Low amount of refrigerant
  • Fulfills the European F Gas Directive No. 517/2014

*GWP = Global Warming Potential



Shipping is Extra and will be charged separately. Shipping Quotes will be given upon request.


All shortages, defects and deficiencies must be reported within 7 days of receiving the shipment. Merlan Scientific cannot assume responsibility for shortages reported after this period.

On receiving goods, check your packing slip and the package contents carefully. Please report any damaged items immediately and keep all shipping materials for inspection. If you have any questions please call 1-800-387-2474 or write us at


Before returning any item to Merlan Scientific, please call for a Return Authorization Number. Shipments received without authorization may be refused.


Merlan Scientific warrants that each product will be free of defects in materials and workmanship for a period set forth in its published user manuals for its system products and for a period of one (1) year for its component products. The warranty commences on the date the product is shipped by Merlan Scientific. Merlan Scientifics’ sole liability and responsibility under this warranty is to repair or replace any defective product, which is returned to it by the buyer, and which Merlan Scientific determines qualifies for repair or replacement under the terms of the applicable warranty. The product returned to Merlan Scientific for warranty service will be shipped to Merlan Scientific at the buyers expense and will be returned to buyer at Merlan Scientifics’ expense. In no event shall Merlan Scientific be responsible under its warranty for any defect, which is caused by negligence, misuse or mistreatment of a product, or for any unit, which has been altered or modified in any way. The warranty of repaired and replacement products shall terminate with the original warranty of the product.

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