This is a lower thermostat designed without the high-limit (ECO) reset found on upper thermostats

it features both Normally Open (NO) and Normally Closed (NC) terminals

Durable Construction: Built to withstand the high-cycle demands and temperature fluctuations found in modern furnace cabinets

Using additional sealants can interfere with the mechanical seat and may contaminate the refrigerant circuit

Honeywell 305917 Gauge Els PW 17895 This is a lower thermostatThe Honeywell 305917 is an industrial grade pressure indicating gauge specifically designed for high accuracy monitoring in HVACR and pneumatic systems. This unit features a 2 inch diameter face with a highly legible 0 160 PSI range, making it essential for technicians managing commercial HVAC maintenance and system diagnostics. The 1 4" NPT back connection ensures a secure, leak free seat in standard manifolds and control panels. For field service