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Thermo Scientific™ Lindberg/Blue M™ Refrigerated Circulating Baths

These baths combine contemporary cabinet design, advanced microprocessor control and a range of accessories to suit a variety of laboratory or process applications.

Manufacturer:  Thermo Scientific™ RWB3220A1

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Catalog No. 15-453-4A

This item has been discontinued by the manufacturer and is no longer available. Please call customer service for assistance: 1-800-766-7000.
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Thermo Scientific™ Lindberg/Blue M Refrigerated Circulating Baths offer a combination of contemporary cabinet design, advanced microprocessor control and a range of accessories to suit a variety of laboratory or process applications. High-strength cabinet construction with 304 stainless-steel interior tanks withstand the most critical applications in demanding laboratory environments. The refrigerated water bath is comprised of two independent units: a bath chamber and a refrigeration system module with identical dimensions.

  • Microprocessor with RTD probe provides simple, accurate and repeatable temperature control while optimizing control parameters during operation Digital temperature display, simultaneously reads setpoint and water temperature
  • Recessed control module protects against dirt and moisture
  • Single-stage, centrifugal pump with independent supply/return ports for maximum circulation
  • Reversible stainless-steel rack allows for optional reduction of working depth by 2in. (5cm)

Adjustable High-Limit Control

  • Prevents critical process overtemperature conditions at any point over the bath operating range
  • Protects bath and its load
  • Interrupts heat and flashes visual warning
  • Automatically resets when temperature returns to normal
  • Fixed overtemperature safety, factory set 105°C, shuts off bath power; push-button manual reset


  • Integrated industrial-strength pump for internal circulation maintains precise temperature uniformity throughout the liquid medium
  • Rounded corners for better water circulation, improved uniformity and easier cleaning
  • With built-in drain with ON/OFF valve
  • Moisture-proof blanketed fiberglass insulation surrounding water chamber improves temperature stability and energy efficiency
  • 304 Stainless-steel construction resists chemicals, simplifies cleaning
  • Long-life heating elements for quick response to controller
  • Protective nonskid rubber feet protect the lab bench
  • Attractive front panel bezel for easy cleaning
  • Mounting clip for immersion glass thermometer (thermometer sold separately)

Refrigeration System

  • Allows accurate control at temperatures near or below ambient conditions
  • Quiet-running, hermetically sealed refrigeration system
  • High volume heat removal capacity rated at 3000 BTU/hr. at 27°C (nominal)
  • Ideal for use with 60%/40% ethylene glycol/water mixture to prevent icing at temperatures below 10°C
  • Independent ON/OFF switch—system can be switched OFF for operation above ambient temperatures

Includes:Two 10ft. (8m) power cords with plugs; independent power cords for bath and refrigeration system (chiller). Two 5ft. hoses with worm gear clamps are included for connection of bath to chiller.

Description & Specifications


0° to 100°C
7 gal.
160 lb.
7.5 in.
18 in.
12 in.
12.5 in.
29 in.
14 in.
120V 60Hz
29 x 14 x 12.5 in. (73.7 x 30.5 x 31.75cm)
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