PDFPrintE-mail
Dwyer-Large diaphragm pressure switchesDwyer-Low Differential Pressure Switch1800i

Dwyer-Low Cost OEM Pressure Switch-A1si

( Dwyer )
Feature:
  • 316 SS or Buna-N diaphragm.
  • Aluminum, Brass, or 316 SS pressure chamber.
  • High current SPDT snap switch.
  • Weatherproof enclosure available in Polycarbonate or 316 SS.
  • Hermetically sealed snap switch option.
Specifications:
Pressure ChamberAluminum with PTFE impregnated anodized coating, brass, or 316 SS.
Diaphragm316 SS on A1S, Buna-N on A1B.
O-ringFluoroelastomer on A1S, Buna-N on A1B.
Temperature Limit-40 to 180°F (-40 to 82°C).
Pressure Limits750 psig (51 bar).
Enclosure RatingO, and OP enclosure none. PC, PN, SC, and SN enclosures meet NEMA 4X standards.
Switch Type

Type 1: SPDT snap switch.

Type 1HS: SPDT hermetically sealed snap switch.
Electrical Rating

Switch Type 1: 15A @ 120/240/480 VAC, 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC.

Switch Type 1HS: 5A @ 120/240 VAC.
Electrical ConnectionScrew terminals on Type 1 switch, terminal block on Type 1HS switch.
Process Connection1/8˝ female NPT and 1/2˝ male NPT. OP style has 1/8˝ female NPT and 1/2˝ male straight thread.
Mounting OrientationWithin 20° of vertical.
Set Point AdjustmentKnurled screw cap with indicating scale.
WeightA1S: 9 oz (.25 kg), A1B: 6 oz (.17 kg).





Back