The SS300 Series are single set point speed switches with single pole, double throw (SPDT) relay dry contact output.
The trip point is set by a potentiometer. An LED indicates when the signal source is present. A second LED turns on when the trip point is reached. An optional time delay is on board to delay operation of the relay for 2-6 seconds after the set point has been reached. The SS300 Series speed switch is intended for installation within a weather- proof enclosure to protect it from rain, dust, etc.