Snow sensor not detecting snow outside?

There can be several reasons for this. First, start by checking the snow sensor supply voltage between pins 2 and 3 of the class two terminal blocks. It should be close to 24 VDC (the label on some unit incorrectly say 24VAC). If there is no voltage...

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What controllers use CIT-1, GIT-1 & SIT-6E sensors?

by Joe Hektor | Jul 26, 2017 |

24 VAC, APS, EUR, Pro, Sensors, Snow and ice, Snow & Ice Sensors FAQs


The CIT-1, GIT-1 & SIT-6E sensors are used with the newer APS-C series controllers, EUR-5A controller and the upcoming PRO series controllers. These controllers supply the sensor 24VDC on the sensors red and black wires (black is ground).

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Can I extend the wires and how far away can I locate the sensors?

Yes! The sensor wire can be extended up to 500 feet with #18 awg wire and 2000 feet with #12 awg wire.

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What conditions will make the sensors call for heat?

The CIT-1, GIT-1 & SIT-6E sensors all call for heat when they sense conditions with both a temperature below 38 °F (3.33 °C) and moisture on their moisture grid. Click here to see more about Snow & Ice sensors

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What voltages should I see when the sensor is connected to the controller and calling for snow?

This depends on the controller, on the newer APS-C series controllers, EUR-5A controller and the PRO series controllers they are supplied with 24VDC across the red and black wires (black is ground). The control signal coming back to the melt control...

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How can I test the snow sensor?

The APS-3C and APS-4C controllers utilize the CIT-1 aerial snow sensor, the GIT-1 gutter snow sensor and the SIT-6E pavement snow sensor to detect weather conditions. All three of the sensors work in the same way, they require a temperature below 38...

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