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Dwyer Series A4 Differential Pressure Switch

Adjustable Set Point, High Overpressure

Rugged Series A4 Differential Pressure Switch offers field adjustments and can handle system pressures up to 6000 psig. Piston design allows mounting in any orientation. The switch is capable of carrying moderate shock and vibratory loads.

See Dimensions

SPECIFICATIONS
Service: Compatible gases.
Wetted Materials: Body, piston, and fittings: anodized aluminum;. spring: steel.
Temperature Limits: -65 to 225°F (-54 to 107°C).
Pressure Limits: 2000 psid (138 bar).
Repeatability: See table.
Switch Type: SPDT.
Electrical Rating: AC: 3 VA, 0.25A @ 120 VAC; 5 VA, 0.25A @ 175 VDC.
Electrical Connection: 24 AWG X 12" (30.5 cm) wire leads.
Process Connection: 1/4" female NPT.
Mounting Orientation: Any.
Set Point Adjustment: See table.
Weight: 8.5 oz (241 g).
Agency Approvals: CE.
Popular Models
Model
Number
Repeatability (psi) Set Point (psid) Increasing Set Point (psid) Decreasing
 A4-1  ±2  7-13  2-7
 A4-2  ±4  13-25  5-16
 A4-3  ±8  25-45  10-21
 A4-4  ±16  35-160  20-80
 A4-5  ±32  120-250  35-120