this SPST (Single Pole Single Throw) device is calibrated to open the circuit at a fixed 350 degrees F

You must verify that your furnace model supports dual-stage firing to ensure the 24V signals are sent correctly to the high and low-stage solenoids

Durable Infrastructure: Forged brass housing resists corrosion and withstands rigorous field environments

As the official OEM replacement for 0131M00012PS and 0131M00012P

including 4-inch square

Emerson Alco 028388 Indicator 318973-401 this SPST (Single Pole SingleThe Emerson AMI 2S13 (Part Number 028388) is a high capacity 1 5 8" sweat moisture liquid indicator designed for critical monitoring in industrial HVACR systems. Engineered for CFC, HCFC, and HFC refrigerants, this sight glass provides immediate visual confirmation of liquid line conditions and system moisture levels. With a 650 PSI maximum working pressure, it is built to withstand high pressure environments common in commercial refrigeration racks.