Refrigerated Circulators with Standard Digital Temperature Controller

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
  • 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

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.

Capacity 7 Liter Low-profile 7 Liter 15 Liter 20 Liter 28 Liter
Working Temperature Range 20°C~+170°C 20°C~+170°C -30°C~+170°C -30°C~+170°C -30°C~+170°C
Nominal Cooling Capacity @20°C 200W 200W 915W 915W 915W
Heater Wattage 1100W(60Hz)/2200W(50Hz)
60Hz Part Number SD7LR-20-A11B SD07R-20-A11B SD15R-30-A11B SD20R-30-A11B SD28R-30-A11B
50Hz Part Number SD7LR-20-A12E SD07R-20-A12E SD15R-30-A12E SD20R-30-A12E SD28R-30-A12E

Electrical plugs for the part numbers listed are Standard U.S. and European types. Country specific plug types available.