Johnson Controls T-4000-2139 Cover This specific electrode is designed

This specific electrode is designed for the HSG housing configuration

Rugged Construction: High-quality alloy build prevents orifice erosion and clogging over long-term operation

preventing premature wear in high-cycle fluid control applications

critical for preventing heat exchanger fatigue and over-firing

Designed as a direct replacement component for the A-4400 series refrigerated air dryer

Johnson Controls T-4000-2139 Cover This specific electrode is designedThe Johnson Controls T 4000 2139 is a professional grade horizontal thermostat cover designed specifically for the T 4000 Series pneumatic room thermostats. Engineered for sleek, unobtrusive installation, this beige plastic cover features a clean aluminum faceplate without a thermometer window or setpoint adjustment openings. This configuration is ideal for facilities where unauthorized tampering must be minimized while maintaining a uniform aesthetic