Mid-West Instrument – Diaphragm Type Differential Pressure Gauges

There is no bypass and therefore they are ideally suited for use on dissimilar fluids, air, gases, or liquids with a high concentration of solids, etc. They also come in a variety of sizes allowing for very sensitive measurements. The Differential Pressure is sensed by the movement of an elastomer diaphragm against a precision calibrated range spring. The change in position of the diaphragm in response to the change in Differential Pressure moves an internal magnet. This magnet, in turn, causes a rotary magnet external to the gauge body to rotate. This rotary magnet has a pointer attached which indicates the differential pressure on the
dial.

• Wide Selection of DP Ranges & Scales
• Elastomer Diaphragm Sensing Element, No Cross Port Leakage
• Up to 500 PSIG Working Pressure (34 bar)
• Over-Range Protection, High over Low and Low over High
• Gauge Housings available in Aluminum, Brass, 316/316L Stainless Steel and Polysulfone Thermoplastic
• Wide Range of elastomers
• Over-range Protection – Full to Maximum Working Pressure
• Panel Mounting – Standard
• Pipe Mounting Kit – Optional – 2″ U-Bolt
• Wall Mounting – Optional – Rear Mount
• NACE Compliance – Optional

• DP Ranges from 0-25 PSID to 0-100 PSID
• Elastomer Diaphragm Sensing Element,
  No Cross Port Leakage
• Up to 3000 PSIG Working Pressure (200 bar)
• Over-Range Protection,
  High over Low and Low over High
• Gauge Housings available in Aluminum, Brass, 316/316L Stainless Steel and Acetal Plastic
• Wide Range of Elastomers
• Over-range Protection Full to Maximum Working Pressure
• Panel Mounting Standard, Front or Rear Panel
• Pipe Mounting Kit Optional – 2″ U-Bolt
• Wall Mounting Optional – Rear Mount
• NACE Compliance Optional

• Differential Pressure Range 0-50″ H2O (0-125 mbar) to 0-30 PSID (0-2.0 bar)
• Accuracy ±5% F.S.
• Dial Size
  • Single 1-1/4″ x 2-1/4″ Oval (Std.)
  • Dual 1-1/4″ x 2-1/4″ Oval (Opt.)
• Working Pressure 1,000 PSIG (70 bar)
• Operating Temp. -40ºC to +93ºC
• Body Material – Aluminium, Brass, 316/316L
• Internal Materials – 316 Stainless Steel
• Elastomers Buna-N (Std), Viton®* , Neoprene, Ethylene-Propylene, Silicone
• Switch Option
  • SPDT 3W, 125 VAC/VDC, 0.25 Amp
  • SPST 60W, 240 VAC/VDC, 3 Amp
• Switch Mounting Pre-set in Tube, Flat Pack, Din Connector
• Process Connections
  • 1/8″ FNPT Back Conn. (Opt.)
  • 1/8″ FNPT Bottom Conn. (Std.)
• Viton® is a Registered Trademark of DuPont Dow Elastomers

• Available Ranges:
  0-5 PSID (0.35 bar) to 0-300 PSID (0-20.0 bar)
• Use with Liquid or Gas media compatible with material of construction
• Full stainless steel construction, compact size, easy installation
• Laser welded, fully-sealed construction: NEMA 4X (IP65)
• Utilizes Piezoresistive Differential Pressure Sensor Isolated Diaphragm
• Zero Adjust / Potentiometer ±5%
• Span Adjustable / Potentiometer ±5%
• CE Certified to EMI / EMC Directive
• LCD or LED display available upon request(Available with DIN Connector & 4-20mA Output only, 2-Wire 20-28 VDC)
• Maximum Overpressure:
  (+) Hi-Side equals 2 times specified DP range
• Maximum Overpressure:
  (-) Low-Side is equal to specified DP range
• Maximum Static Pressure 2,900 PSI
• Operating temperature limits – 25.56° C to 79.44° C.
• Storage temperature is -40° C to 93.33° F
• Sensor is temperature compensated from 0° C to 50° C.
• Model 700 is Manufactured in China