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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.
Cleveland Controls Air Pressure Sensing Switch, 15 A, 277 VAC, 60 Hz, 1/4 in 90 deg Male Quick Connect Spade Terminal Electrical, (2) Dual-Barbed Slip-On Connectors Supply Line Connection, Switching Action: Snap, SPDT, 0.05 in WC Set Point, 0.02 in WC Differential, 1/2 lb/sq-in Maximum Pressure, Diaphragm/Vertical Mounting, Pilot Duty: 300 V-A at 115 - 277 VAC, -40 to 180 deg F, 4.38 in W x 5.81 in H x 2.94 in D
| Amperage Rating | : | 15 A |
| Connection Type | : | 1/4 in 90 deg Male Quick Connect Spade Terminal Electrical, (2) Dual-Barbed Slip-On Connectors Supply Line |
| Contact Configuration | : | SPDT |
| Dimensions | : | 4.38 in W x 5.81 in H x 2.94 in D |
| Frequency Rating | : | 60 Hz |
| Mounting Type | : | Diaphragm/Vertical |
| Pilot Duty Rating | : | 300 V-A at 115 - 277 VAC |
| Pressure Rating | : | 0.05 in WC Set Point, 0.02 in WC Differential, 1/2 lb/sq-in Maximum |
| Switching Action | : | Snap |
| Temperature Rating | : | -40 to 180 deg F |
| Voltage Rating | : | 277 VAC |
- 2 barbed 1/4 in slip-on connectors sample line connectors
Specification Sheet