The capillary thermostat is temperature control device that controls heating systems according to a temperature setpoint. This type of thermostat is the easiest to operate and.the most economical when it comes to simple room temperature control. Capillary Thermostat Capillary thermostat model RQ_30_35_40 Technical specification Documents Technical specification – Temperature range: 5 – 30 °C– LED indicator lamp (on/off heating)– On/Off switch– IP protection: IP20– Δt ≤ 1 °C Documents Technical specification.pdf User manual.pdf