Model A50
Current Sensing Relay
Description and Installation Instructions
The Model A50 (24 volt) Current Sensing Relay
is designed for interfacing humidifiers with all types
of forced air furnaces and air conditioning equipment.
The Model A50 Current Sensing Relay
measures electrical current rather than
voltage. This type of relay is more reliable
and less expensive than using sail switches,
pressure switches or other types of relays.
Actual size
The relay is easily installed around the
common lead of the blower motor and
inserted into the circuitry. (See wiring
diagrams on back.)
The Model A50 case is made from high-impact plastic. The lead wire bracket is
sponge-packed to prevent wire laceration, slippage and accidental contact with
metal.
See Back for Installation Instructions
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A50 • Rev 2/05
