Relay Switches

Danfoss 115v, 60Hz potential relay. Learn More

Danfoss compressor relay. Learn More

Barber Colman (Schneider Electric) pneumodular diverting relay: 4 to 20 psig set point range, 3.0 ±0.1 psig differential, signal below set point: ports NO and C are connected, signal above set point: ports NC and C are connected. Learn More

Honeywell 120 volt, triple aquastat relay, with a 3" insulation depth and 3" insertion depth, which provides pump control for hydronic heating system. L8124 aquastat relays provide high limit, low limit, and circulator control for maintaining boiler temperatures. Learn More

Honeywell 24 volt, triple aquastat relay, with a 1-1/2" immersion depth, which mounts vertically on the boiler. L8124 aquastat relays provide single-zone control for hydronic heating systems. Learn More

Honeywell 120 volt, triple aquastat relay, with no well, which mounts vertically on the boiler. L8124 aquastat relays provide single-zone control for hydronic heating systems. Learn More

Honeywell 120 volt, triple aquastat relay, with a 1-1/2" immersion depth less well, which mounts horizontally on the boiler. L8124 aquastat relays provide single-zone control for hydronic heating systems. Learn More

Honeywell 120 volt, triple aquastat relay, with no well, which mounts horizontally on the boiler. L8124 aquastat relays provide single-zone control for hydronic heating systems. Learn More

Honeywell 120 volt, line voltage electric aquastat relay with a 140-240°F temperature range. This relay is an immersion type controller that combines high limit protection with switching relay control of the burner and circulator motor. Learn More

Honeywell 24 volt, line voltage, vertically-mounted aquastat relay with a 140-240°F temperature range and a 4-1/2" capillary with well. This controller provides high limit protection with switching relay. Learn More

Honeywell 120 volt, SPST high limit, vertically-mounted aquastat relay with a 180-240°F temperature range (fixed 15°F differential) and a 4-1/2" capillary with well. This aquastat features a vent damper. Learn More

Honeywell millivolt or low voltage aquastat relay with a 120-240°F temperature range that can be mounted vertically or horizontally. This relay is an immersion type controller that combines high limit protection with switching relay control of the burner and circulator motor. Learn More

Honeywell pneumatic, seven-input load analyzer relay. The RP913A is a diaphragm logic pressure selector that chooses the highest and lowest branch pressure input from thermostats to final control elements. Learn More

Johnson Controls booster relay that operates as a pneumatic repeater and volume amplifier. The pilot signal received is repeated at its output at a 1:1 ratio. Learn More

Johnson Controls reversing relay that operates as a 1:1 pneumatic inverter, volume amplifier, and inverse sequencer. The relay changes the output of a controller from direct to reverse acting. Learn More

Siemens (Powers) pneumatic positioning relay with mounting hardware designed to provide positive positioning of a pneumatic valve or damper actuator. This relay Learn More

Siemens (Powers) heavy-duty pneumatic analog relay designed to obtain specialized control action within pneumatic control system. This relay has 1/8" NPT air connections for air supply, output, and direct and reverse acting inputs. Learn More

Honeywell relay that provides intermediate SPST switching of a line voltage device from a low voltage controller. An integral transformer provides low voltage power for control circuit. This relay has a maximum input of 5.0 W. Learn More

Honeywell vertically mounted triple aquastat relay that features high limit protection, low limit and circulation control, a 10°F fixed high limit differential, a 10-25°F low limit differential, a 130-240°F high limit operating range, a 110-220°F low limit operating range, and a 0-95% RH operating humidity range. This relay has a 3" insertion well and 1-1/2" insulation. Learn More

Honeywell 24 VAC, SPST, 30 amp compressor relay for use with DR90 and DR120 series compressors. Learn More