this industrial-grade furnace flame rod ensures consistent millivolt signaling

making it a staple for commercial mechanical contractors upgrading legacy pneumatic systems or installing modern BACnet MS/TP networks

engineered to shut off flow instantly in the event of glass breakage

a regulated spring conversion for the gas valve

it is designed to regulate hot water

Tjernlund Products 950-0640 Limit Switch 318820-201 this industrial-grade furnace flame rodThe Tjernlund Products 950 0640 is a critical L135F High Limit Switch designed specifically for SS1 and SS1 R Side Wall Vent Systems. As a veteran technician knows, maintaining the safety circuit in power venting applications is non negotiable. This normally closed switch monitors internal temperatures and triggers a burner lockout if it detects an overheat condition, effectively preventing equipment damage or hazardous exhaust scenarios. Engineered