50% glycol

ideal for maintaining setpoints in heat pump systems during extreme ambient drops

this 750mV thermopile is rated for a maximum operating temperature of 750°C

the A30-2209 is equipped with a standard SPST switch that includes a positive "off" position for manual system shutdown during maintenance

they are the same part

Greenheck 1006918 Pressure Switch 321702-401 50% glycolThe Greenheck 1006918 Pressure Switch (Model: HS100 260 0010) is a high precision, Normally Open (NO) refrigerant pressure control designed for critical monitoring in commercial and industrial HVACR systems. Engineered to actuate at 75 PSI and reset at 95 PSI, this Greenheck OEM replacement part provides essential safety and logic control. By accurately sensing refrigerant levels, it prevents compressor cycling issues and ensures the system operates