This sub-master air velocity controller features a universal design

ensuring precise synchronization between branch pressure and mechanical heating or cooling stages

High-Voltage Tolerance: Rated for 440Vac

allowing for more accurate readings without requiring 3-wire or 4-wire compensation in many applications

What is the difference between RTA-125 and RTH-125

McDonnell & Miller FS7-4J Switch Els PW 29614 This sub-master air velocity controllerThe McDonnell & Miller FS7 4J (Part Number 120060) is a heavy duty industrial liquid flow switch designed for high demand applications including secondary filtration, hydronic heating, and process cooling. This model features a 1 1 4" BSPT connection and is equipped with a single pole, double throw (SPDT) snap switch, allowing for simultaneous make and break circuit control. Built for durability, it utilizes brass construction and a magnetic switching