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offering a seamless fit for standardized burner mounting configurations

This 1/2 watt (often specified as 1/4W to 1/2W depending on the application) 4-20mA adaptor allows for precise proportional control without the need for complex external transducers

Built to exacting Armstrong Air specifications

When replacing a failed capacitor

Functional Devices RIB RIB2421SB Relay What is the best wayThe Functional Devices RIB2421SB is a heavy duty, pre packaged 20 Amp enclosed relay engineered for high demand HVACR and industrial energy management systems. This SPDT relay features a multi voltage coil that accepts 24VAC DC, 120VAC, and 208 277VAC, providing a versatile solution for varying control circuit requirements without the need for multiple stocked parts. Designed for direct BAS and lighting control, the RIB2421SB relay includes an