Dwyer Instruments 43320B Pressure Switch, Capsu-Photohelic Switch/Gage, 10-0-10 in w.c., Brass Case

Dwyer Instruments

Dwyer Instruments 43320B Pressure Switch, Capsu-Photohelic Switch/Gage, 10-0-10 in w.c., Brass Case

SKU: IMM_74521363Brand: Dwyer Instruments
$969.00 USD

Card or bank transfer · proforma invoice on request

We ship worldwideTraceable calibration documents

Key specs from the product description

Series
43000B Capsu-Photohelic switch/gage
Range
10-0-10 in w.c. (bidirectional)
Accuracy
±3% of full scale at 70 °F (21.1 °C)
Switch repeatability
±1% of full scale
Switch type
Two phototransistor-actuated relays, each 2 Form C (DPDT)
Electrical rating
10 A @ 120 VAC, 6 A @ 240 VAC, 10 A @ 28 VDC
All 12 specifications ↓
Dwyer Instruments 43320B Pressure Switch Overview The Series 43000 Capsu-Photohelic functions as a precise pressure gage combined with a highly repeatable pressure switch. Its encapsulated sensing element suits...

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Dwyer Instruments 43320B Pressure Switch

Overview

The Series 43000 Capsu-Photohelic functions as a precise pressure gage combined with a highly repeatable pressure switch. Its encapsulated sensing element suits both compatible gases and liquids at system pressures to 500 psig, and the brass-case version is specified for water or water-based liquids.

Two phototransistor-actuated DPDT relays provide low and high limit control, with setpoints adjusted by knobs on the gage face. Individual setpoint deadband is less than 1% of full scale, and setpoints can be interlocked for variable deadband, ideal for control of pumps.

Features

  • 4-inch Magnehelic-style gage with encapsulated sensing element
  • Range 10-0-10 in w.c. (bidirectional)
  • Cast brass case for water or water-based liquids
  • Two phototransistor-actuated DPDT relays, 2 Form C per setpoint
  • Setpoint knobs on gage face with deadband less than 1% of full scale
  • ±3% of full scale accuracy at 70 °F
  • System pressure capability to 500 psig
  • 1/4-inch female NPT process connections

Applications

  • Pump control and pumping systems
  • Low/high limit control on compatible gas or liquid lines
  • Filter and differential pressure monitoring in process and HVAC service

Dwyer Instruments 43320B Pressure Switch Technical Specifications

Series 43000B Capsu-Photohelic switch/gage
Range 10-0-10 in w.c. (bidirectional)
Accuracy ±3% of full scale at 70 °F (21.1 °C)
Switch repeatability ±1% of full scale
Switch type Two phototransistor-actuated relays, each 2 Form C (DPDT)
Electrical rating 10 A @ 120 VAC, 6 A @ 240 VAC, 10 A @ 28 VDC
Power requirements 120 VAC 50/60 Hz; 240 VAC and 24 VAC optional
Pressure limits -20 in Hg to 500 psig
Temperature limits 20 °F to 120 °F (-6.7 °C to 48.9 °C)
Process connections 1/4-inch female NPT
Dial / case 4-inch dial, 5-inch OD x 9-3/16-inch case
Weight 11 lb, 2 oz (brass case)

Manufacturer information: Series 43000 spec sheet on dwyeromega.com.

Price $969.00 USD as listed on 05 Nov 2026. Request a firm quote: https://na.indomultimeter.net/products/dwyer-instruments-43320b-pressure-switch-capsu-photohelic-switch-gage-10-0-10-in-w-c-brass-case

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You get a 30-day money-back guarantee for items that arrive defective, damaged or wrong. See the refund policy.