Description
Model DFS-221 is an airflow proving switch designed for duct heater, oven, and other HVAC or Energy Management applications where an open-mounted, nonadjustable switch is desirable. It is especially suitable for surface-mounting in areas where internal access is limited. It can be used to sense positive, negative, or differential air pressure. The DFS-221 is equipped with a convenient barbed sample line connector that accepts flexible tubing.
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Manuals (1)
Specs
Setpoint Range:
.05" to .02" WC
Max Pressure (PSI):
.5 PSI
Switch:
SPDT
Electric Connection:
1/4" Quick-Connect Male
Operating Temp Range:
-40°F to 180°F
Mount:
Diaphragm Vertical
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