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ETI MODEL APS-3B Snow Switch. Automatic Snow/Ice Melting System Controller.

ETI Snow and Ice Melting Controls and Sensors
We are an authorized stocking distributor for ETI (Environmental Technology Inc.)

Links to other ETI products:
MODEL CIT–1 Snow Sensor
MODEL GIT–1 Automatic Gutter Deicing Control
MODEL SIT–6E Pavement-Mounted Sensor 


In conjunction with up to six sensors residing in target zones, the microprocessor-based APS-3B provides effective, economical automatic control of snow melting applications for walkways, ramps, driveways, gutters and downspouts. Operating at either 120 volt or 208-240 volt, 50/60 Hz, the APS-3B's DPDT output relay switches 24 Amp heater loads or directly operates both mechanically and electrically held remote contactors.

The adjustable hold-on timer provides up to 10 hours of heater operation after snowfall ceases, to complete snow/ice melting. Independent of weather conditions, a manual heater cycle control operates heaters for the hold-on period to clear tracked slush and drifted snow. LEDs provide indication of power, sensor status, heater operation and ground fault. Remote heater cycle and system indication is provided by RCU-1 optional accessory.

The APS-3B nonmetallic enclosure is suitable for NEMA 1 through 3R, 12 and 13 applications over an ambient temperature range of -40° to 136° F(-40° C to 58°).

For installation simplicity and low cost the sensor, CommLink and RCU-1 wiring is NEC Class 2.

ETI's Two year limited warranty covering defects in workmanship and materials applies. Contact Customer Service for complete warranty information 

Installation and Operation Manual

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We are a Distributor of Industrial, Commercial and Residential Heaters and Controls. Always consult manufacturers installation instructions for proper installation of the products or systems shown on this website. © Copyright 1999-2019 Mor Electric Heating Assoc., Inc.

5880 Alpine Ave. NW - Comstock Park, MI 49321  USA
Tel 616-784-1121 - 800-442-2581 - Fax 616-784-7775

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