Belimo 22DTH 51M Sensor 320788 704 This analog pressure indicator is This analog pressure indicator is optimized for low pressure compressed air systems where consistent accuracy and mechanical durability are non negotiable for commercial mechanical contractors This 1 2 HP 115V programmed motor is a constant torque blower solution designed to drop directly into compatible Trane and American Standard air handlers and furnaces The Belimo 22DTH 51M is a precision duct mounted sensor engineered for simultaneous measurement of relative humidity and temperature in demanding HVAC systems Is this sensor suitable for plenum rated applications