The switch shown is 2" square and is a Model E1 or E2 that can be connected in series with a resistive load carrying 2 amperes of current at 120 volts AC to have a circuit configuration similar to a normally open or close switch. It also can be custom built for other AC voltages by changing the value of the resistor.
The Model E can be supplied as a normally closed switch with gold contacts for use with currents of 10 ma. or less with AC or DC voltages of 30 v or less. This switch is smaller than the Model E1 or E2.
The Model E-DC has a relay with high voltage D.P.D.T. contacts and requires a supply voltage of 5 volts D.C. or 5.3 to 28 volts D.C.
All Model E switches have 1% accuracy of full range for temperatures of -40° F. to +120° F
All the above switches use the diaphragm material developed by The Henry G. Dietz Co., Inc. that is silicone rubber with a thickness of 0.02"
These are the first sensors that can be actuated by the 3" and 4" square miniature blowers used in air cooled electronic equipment. They will detect air flow failure due to dirty air filters, accidental blocking of air intake, or failure of blower motors.