With a maximum sense voltage of 600 Vac and a rugged enclosure rated for temperatures between -30 and 140° F

and 3155 Series units

or inconsistent water temperatures that do not match the digital display setpoint

specifically engineered for pump-up or high-level fill applications where the relay remains energized while the probe is dry

Enhanced System Reliability: Reduces mechanical stress caused by rapid temperature fluctuations (thermal shock) in the domestic hot water or heating loop

Siemens Building Technology GMA131.1U Actuator R-407C With a maximum sense voltageThe Siemens Building Technology GMA131. 1U is a specialized OpenAir electronic damper actuator engineered for commercial HVAC applications. This 24V spring return actuator provides 62 lb in torque (7 Nm), making it an ideal choice for managing return air, mixed air, and exhaust dampers in both constant and variable air volume (VAV) systems. Designed with three position control (floating), it allows for precise positioning while ensuring a reliable