Johnson Controls T-3111-1 Valve Actuator 30067439-890 this is a passive conductivity

this is a passive conductivity probe and is generally compatible with most 24V or 120V AC conductivity-based liquid level controllers

Proper installation of this boiler section kit prevents hazardous flue gas bypass and costly water damage to the hydronic heating system components

Suitable for commercial and industrial refrigeration applications

The assembly utilizes 25A 250V AC resistive switching capacity and includes a 36-inch capillary with a copper bulb for precise thermal feedback

Johnson Controls T-3111-1 Valve Actuator 30067439-890 this is a passive conductivityThe Johnson Controls T 3111 1 Valve Actuator is a heavy duty, proportional action pneumatic thermostat designed for integrated control of steam or water valves in terminal air conditioning units. This direct acting controller features a liquid filled bulb element with a 42 inch capillary, ensuring precise sensing of return air temperatures. Built for rugged field reliability, the T 3111 1 provides seamless valve top mounting for VG7000 Series valves