sr501 for sale, brand-new and used.

TACO SR501-OR-4 FUEL MIZER SINGLE ZONE SWITCHING RELAY WITH OUTDOOR RESET The FuelMizer™ (SR501-OR) is a microprocessor-based control designed to regulate the supply water temperature of a single boiler, based on the outdoor temperature. The FuelMizer is a boiler reset control and switching relay in one unit; it is ideal for retrofit application, but may also be used in new installations as well. Full outdoor boiler reset control

50 X SR501 Human Sensors TTL output goes high when it detects people, output is low when it is not detecting. When a person enters the protected area the sensor output is high. When a person leaves the protected area, after the adjustable delay, the sensor output goes low.

Fifty HC-SR501 Adjustable IR Pyroelectric Infrared PIR Human Motion Sensor Detection Modules TTL output goes high when it detects people, output is low when it is not detecting. When a person enters the protected area the sensor output is high. When a person leaves the protected area, after the adjustable delay, the sensor output goes low.

25 X SR501 Human Sensors TTL output goes high when it detects people, output is low when it is not detecting. When a person enters the protected area the sensor output is high. When a person leaves the protected area, after the adjustable delay, the sensor output goes low.

Twenty Five HC-SR501 Adjustable IR Pyroelectric Infrared PIR Human Motion Sensor Detection Modules TTL output goes high when it detects people, output is low when it is not detecting. When a person enters the protected area the sensor output is high. When a person leaves the protected area, after the adjustable delay, the sensor output goes low.

Brand New with box Taco SR501-2 Pump Switching Relay 1 Zone New Old Stock Shipping is Fast and Free via USPS Priority Mail

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Taco SR501 Single zone switching relay is standard equipment for every installer. It can easily replace any brand made by any manuf

Item is new in original box, plastic is sealed.

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HONEYWELL R8845U1003 HONEYWELL UNIVERSAL SWITCHING RELAY REPLACES R845A-1030 & RA832A-1066. ENC.

This is a new relay I got for a job but didn't use. Never put power to it. It's been in my truck for a few months so it has some scuffs on the cover.

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