Refrigerated Circulating Baths

Available in 40 different models, the latest generation of PolyScience Refrigerated/Heated Circulating Baths uphold our reputation for innovation, product quality and refrigeration expertise. Our lab-and operator-friendly Circulating Baths set a new industry standard for design, performance and value.

Refrigerated Circulators with
Standard Digital Temperature Controller

Key Specifications

Working Temperature: From -30° up to +170°C 
Temperature Stability: ±0.04°C 
Safety Rating: DIN 12876-1 Class I (for use with non-flammable liquids) 
Pump: 2-speed 
External Circulation: Closed-loop 

  • LidDock™ self-stowing reservoir cover
  • DuraTop™ insulating, chemical-resistant top deck
  • WhisperCool® Environmental Control System
  • Cool Command™ modulated refrigeration system
  • Reservoir drain
  • Washable air filter

Key Features

  • Large, universal icon and English display
  • Swivel 180™ Rotating Controller
  • On-board connectivity: RS-232 serial output
  • On-screen prompts
  • Automatic performance optimization
  • Single-point calibration capability


Performance Specifications & Part Numbers

7 Liter Refrigerated Circulator, -20°C 7 Liter Low Profile Refrigerated Circulator, -20°C 15 Liter Refrigerated Circulator, -30°C 20 Liter Refrigerated Circulator, -30°C 28 Liter Refrigerated Circulator, -30°C
Working Temperature Range -20° to 170° C -20° to 170° C -30° to 170° C -30° to 170° C -30° to 170° C
Nominal Cooling Capacity @ +20C (W)
Heater Wattage 1100 W (60Hz)
2200 W (50Hz)
1100 W (60Hz)
2200 W (50Hz)
1100 W (60Hz)
2200 W (50Hz)
1100 W (60Hz)
2200 W (50Hz)
1100 W (60Hz)
2200 W (50Hz)
60Hz Part Number
50Hz Part Number SD07R-20-A12E SD7LR-20-A12E SD15R-30-A12E SD20R-30-A12E SD28R-30-A12E


Set and read to 0.1°C, ±0.04°C temperature stability, and a 2-speed pump make the Standard Digital Controller an economical and reliable choice for a variety of laboratory applications, including those requiring closed-loop external circulation.  


RS-232 serial communication capability allows control and data logging via a PC or other remote device. 

Intuitive Operation

Plain-text prompts and intuitive controls guide you quickly through setup. Intelligent touch and scroll display makes it easy to make both large and small set-point changes.


User-settable high-temperature safety provides over-temperature and low-liquid level protection. Adjustable high and low limits guard against unintended set-point changes.