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Alpha Refrigerated Circulators

LAUDA-Brinkmann Alpha Refrigerated Circulators are the cost-effective choice in the area of high-quality LAUDA thermostats. The cooling technology of cooling thermostats RA 8, RA 12, and RA 24 enables cooling performance through the entire temperature range of -25 up to 100°C. The well-priced equipment range is made possible by minimizing any unnecessary features, with the focus on reliability and user-friendliness.

The thermostats are suitable for operation with non-flammable liquids (water, water/glycol) and for both internal and external thermostating tasks. A 1-point-calibration of the thermostats can be carried out by the user. Operation is simple due to the fully-electronic continuous controller and simple 3-key operation with user-friendly menu prompts. A one-line LED display shows actual or set temperature.

Units include low level and over-temperature protection with both acoustic and visual alarms. The deep-drawn stainless steel bath is durable and the circulating pump provides excellent control for flow reduction. An electric connector controls through-flow cooler DLK (On/Off/Automatic). A drain connection at the rear makes maintenance easy. Bath covers and pump kits are included standard.

Key Features

  • Thermostatic bath/circulator with LED, simplest operation and integrated cooling system
  • 1-line LED display for display of actual or set temperature
  • User-friendly menu guidance with simplest 3-key operation
  • Fully electronic continuous controller
  • Low level and overtemperature protection for use with non-flammable liquids
  • Acoustic and visual alarm
  • Circulating pump with flow reduction
  • Cooling through intelligent energy saving system (compressor automatic)
  • Stainless steel bath
  • Outlet connection at the rear

Specifications for Lauda-Brinkmann Alpha Refrigerated Circulators

RA 8 RA 12 RA 24
Working Temp. Range -25–100°C
Temp. Control ± 0.05°C
± 0.05°C
± 0.05°C
Heater Power 1.15 kW
1.15 kW  1.15 kW
Cooling output at 20°C 0.225 kW 0.325 kW 0.425 kW
Pump Pressure Max. 0.2 bar 0.2 bar
0.2 bar
Pump Flow Max. 15 L/min. 15 L/min.
15 L/min.
Bath Volume 5–7.5 L 9.5–14.5 L 14–22 L
Bath Opening 165 x 190 mm 300 x 190 mm 350 x 290 mm
Bath Depth 160 mm 160 mm 160 mm
Overall Dimensions (WxDxH)  235 x 500 x 605 mm 365 x 500 x 605 mm 415 x 605 x 605 mm
Standard Accessories 1 bath cover
1 bath cover
1 bath cover
Cat. No. 115V, 60Hz LCK 4907 LCK 4908 LCK 4909

Item Volume Bath WxDxH- mm Model Temp. Range Unit of Measure Price Purchase
14–22 L 350x290x160 RA24 -25–100°C Each
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5–7.5 L 165x190x160 RA8 -25–100°C Each
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9.5–14.5 L 300x190x160 RA12 -25–100°C Each
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