Mcdonnell & Miller RB-24E-L, GuardDog Electronic, 24V Low Water Cut-Off w/ burner control harness (Water)

Brass threads enable a secure and trouble-free installation Specifications Test button to quickly confirm proper operation Universal wiring harness fits 100% of today's gas boilers -S, -A and -L models provide "plug & play" installation with most residential boilers Compact size Easy to install and wire Automatic reset feature resumes operations after a power outage when water is on probe Green LED indicating power on Red LED indicating low water condition Solid state operation 15,000 ohms probe sensitivity Maximum ambient temperature 120 Deg. F (49 Deg. C) Maximum water temperature 250 Deg. F (121 Deg. C) Maximum water pressure of 50 psi (3.5 kg/cm3)