Rapid Low Temperature Circulating Bath LRTB-A40 is a microcomputer-controlled 7L bath with a refrigeration system, operating within a temperature range of -40°C to 200°C. It is equipped with dual red and green LED windows, where the upper window measures the red value, and the lower window measures the green value for precise monitoring. The unit features internal and external cycles, with external cycles discharging thermostatic liquid outside the bath, effectively raising the temperature of the external vessel for controlled thermal applications.