This is a passive

While the 304 SS probe is rugged

For contractors servicing residential or light commercial venting systems

and 61-101713-01 without modification

Functional Devices RIB2402D Relay This is a passiveThe Functional Devices RIB2402D is a versatile DPDT enclosed relay designed for demanding HVACR control circuits and building automation systems. Built with a 24VAC DC coil and featuring a 208 277V 10A rating, this pilot device is engineered for switching multiple loads or isolating disparate control voltages. The RIB2402D power relay utilizes a NEMA 1 enclosure, facilitating a secure external mounting directly to electrical boxes via a 1 2 inch NPT