HYDROLEVEL COMPANY Safgard Low Water Cut-Off, Series: 500, 24 VAC, 60 Hz, 3.6 V-A VA, Manual Reset, 3/4 in Thread, NPT Connection, Configuration: SPDT, 160 lb/sq-in Pressure, 5.8 A Full Load, 34.8 A Locked Rotor at 24 VAC Switch, 50 V-A at 24 VAC Pilot Duty Alarm Contact, Galvanized Steel Control Housing, Glazed Ceramic Probe Insulator, 316 Stainless Steel Probe Tip and Brass Probe Nut, 250 deg F Water, 5-1/2 in L x 6-1/4 in W x 5-9/16 in H

• 15 sec burner off delay, 30 sec burner on delay
• Heavy-duty electro-mechanical design for long life
• Low maintenance - no moving parts to wear stick or hand up, as in float devices
• More probe plate space - large probe tip puts more conductive surface area in the water, leading to more dependable operation and less chance of nuisance boiler shutdowns
• NEMA 1 enclosure
• Inexpensive to own and operate
• Burner circuit test button tests control operation without lowering the water level

• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/Hydrolevel_500SV_Manual.pdf
• Specification Sheet https://assets.unilogcorp.com/267/ITEM/DOC/Hydrolevel_500SV_Specification_Sheet.pdf