Product details:

Test button to 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 is on. Red LED indicating low water condition. Solid state operation. 15,000 ohms probe sensitivity. Maximum ambient temperature 120 F (49 C). Maximum water temperature 250 F (121 C). Maximum water pressure of 160 psi (3. 5 kg/cm3). Made in the USA.