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The SMPS-1 is supplied with a protective field cover to simplify asphalt or concrete installations and comes with 9 m (30 ft) of wire for connection back to the SMMC-3 Control Panel
The low voltage SMPS-1 senses falling or drifting snow by melting it on the grid area of the sensor and then detecting the presence of moisture by measuring an electrical signal between the grid bars
The SMPS-1 also measures the temperature of the surface
This dual sensing technique allows the SMMC-3 to control the heating equipment (snow melting, de-icing cables, etc.) in the most efficient manner possible. This assures minimum energy costs while still providing reliable surface snow detection
The sensor enclosure is provided with a 1/2" NPT conduit connection
Connection wire may be extended up to 152.4 m (500 ft) with an appropriately rated 18-20 AWG 4-wire shielded cable