The MSPS is a "stripped" version without a heavy-duty housing

a spark electrode

OEM Compatibility: Exact replacement for high-performance Fulton boiler fan switches

meaning it will stay in its last commanded position if power is lost

This UV-certified safety relief valve features a 1-inch MPT inlet and a 1-inch FPT outlet

Siemens Building Technology 192-206 Thermostat 318518-761 The MSPS is a "stripped"The Siemens Building Technology 192 206 is a professional grade pneumatic room thermostat designed for high performance climate control in commercial facilities. This Powerstar 192 series unit features a dual setpoint configuration, specifically engineered for day night vent applications using a direct acting (DA DA) control sequence. When your main supply air pressure shifts from 18 psi to 25 psi, the internal bimetal elements automatically toggle