What is the difference between this and the Johnson Controls P70AA-118

Precision Control: Eliminates mechanical play in the damper linkage

000V output

The Antunes Controls 8021204007 is typically rated for pilot duty and general-purpose electrical switching

it functions effectively on 2-wire systems by connecting to the RH and W terminals

McDonnell & Miller 67-G Low Water Cut Off Els PW 17895 What is the difference betweenThe McDonnell & Miller 67 G is a float operated mechanical low water cut off engineered specifically for steam boilers and millivolt service applications. For contractors managing residential or commercial steam systems, this auto reset control provides critical burner protection by interrupting the millivolt burner circuit if the water level drops to a dangerous point. The unit features dual precision switches, allowing for simultaneous low water cut