Model 700 / 710 / 715

Diaphragm Type

WET/WET Differential Pressure Transmitter

Mid-West Instrument wet/wet differential pressure transmitter utilizes a piezoresistive differential pressure sensor sensing element with stainless steel isolated diaphragm. Silicon oil is filled in between die and two diaphragms. The measured differential pressure is transmitted onto the die through the diaphragm and silicon oil. The signal output generated by the piezoresistive bridge sensor is amplified into a useable voltage or 4-20 mA output as specified by customer. Series 700 is manufactured in China. It is recommended to install a 3 valve manifold between point of measurement and the transmitter. 1 Year Limited Warranty.  (Standard Delivery 4 Weeks ARO.)

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Product Features/Benefits

  • Utilizes Piezoresistive Differential Pressure Sensor Isolated Diaphragm
  • Use with Liquid or Gas media compatible with material of construction
  • Full stainless steel construction, compact size, easy installation
  • Model 710 LCD Display or Model 715 LED Display available upon request
  • (Available with DIN Connector & 4-20mA Output Only)
  • 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
  • 1 Year Warranty
  • For complete model details See Bulletin_700.pdf

Specifications / Configuration

  • Laser welded, fully-sealed construction: NEMA 4X (IP65)
  • Differential Full Scale Ascending Accuracy 5 PSID to 300 PSID ±0.50% (ASME B40.1 Grade 2A)
  • Available in a Variety of Dial Scales: PSID, BAR and KPA.
  • Static Working Pressures: 2900 PSIG
  • Operating Temp -10°F to +80°F
  • Material of Construction: – 321 Stainless Steel(Wetted Part)
  • Diaphragm & Internal wetted parts-316L Stainless Steel
  • Fill Liquid: Silicone
  • Instrument process connections: ¼” BSPP (STD)
  • Optional Process connection adapters: ¼” Male BSPP X ¼” Female NPT and ¼” Male BSPP X ½” Female NPT
  • Elastomers O-ring Material: Viton
  • For complete specifications see: Specificationsheet_700.pdf

Common Applications

  • Filters
  • Local Flow Indication
  • Factory Pneumatic Air
  • Heat Exchangers
  • Strainers, Pumps
  • Pitot Tubes
  • Level Applications

Electrical Specifications:

See Bulletin IOM_700

Mid-West Instrument Model 700 signal output generated by the piezoresistive bridge sensor is amplified into a useable voltage or 4-20 mA output as specified by customer. Zero and Span Adjustable, CE Certified to EMI / EMC  & RoHS Directives, LCD or LED display available upon request. Din Connector available with 4-20mA output only. NEMA 4X (IP65) Zero and Span Adjustable.

  • Power Supply: 2-Wire 15~28 VDC, LCD = 2-Wire 18~28 VDC, LED = 2-Wire 20-28 VDC, 3-Wire 15~28 VDC
  • Output Signals: 2-Wire = 4~20 ma  DC,  3-Wire = 0-5 VDC, 1-5 VDC, 0-5 VDC, 0-10 VDC, 0-10 ma DC and 0-20 ma DC
  • Electrical Connections: Din Plug 43650 or 1.5m 4-pin cable, Response Time: (10%~90%) ≤1ms, Insulation Resistance 100MΩ, 50VDC

Additional Options:

  • Stainless Steel Adapters: ¼” Male BSPP X ¼” Female NPT and ¼” Male BSPP X ½” Female NPT

The Mid-West Advantage

“Diaphragm Type” Gauges with Electrical Optional

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 114 0-0.72 PSID (0-20" H20) to 0-20 PSID (0-600" H2O)
Tank Level Applications
±2% 1000 PSI CE / LVD, RoHS Compliant, NEMA 4X, 4-20mA Transmitter
Model 130 0-5" H2O to 0-15 PSID (0-400" H2O) 0-5" H2O to 0-9.9" H2O
±5%
0-10" H2O to 0-15 PSID
±3/2/3%
Up to 500 PSI CE / LVD, RoHS Compliant, NEMA 4X, Class 1-Div. 1
Model 140 0-50" H2O to 0-100 PSID 0-50" H2O to 0-399" H2O
±5%
0-15 PSID to 0-100 PSID
±3/2/3%
Up to 3,000 PSI CE / LVD, RoHS Compliant, NEMA 4X, Terminal Strip, Class 1-Div. 1, Class 1-Div. 2, 4-20mA Transmitter N/A
Model 142 0-20" H2O to 0-25 PSID ±3/2/3% Up to 3,000 PSI CE / LVD, RoHS Compliant, NEMA 4X, Terminal Strip, Class 1-Div. 2, 4-20mA Transmitter
Model 522 0-5 PSID to 0-50 PSID ±5% 1,000 PSI CE / LVD, RoHS Compliant N/A

Electrical “Diaphragm Type” Gauges

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 240 0-20" H2O to 0-100 PSID ±3/2/3% Up to 1500 PSI CE / ATEX / RoHS Compliant CSA, UL & KOSHA CERTIFIED, NEMA 4X, Terminal Strip, Class 1-Div. 1, Class 1-Div. 2, 4-20mA Transmitter N/A
Model 700 / 710 / 715 0-5 PSID to 0-300 PSID ±0.50% 2,900 PSI 2-Wire
4-20 mA Transmitter 15-28 VDC, LCD = 4-20 mA Transmitter 18-28 VDC, LED = 4-20 mA Transmitter 20-28 VDC
3 Wire
15-28 VDC/1-5 VDC, 15-28 VDC/0-5 VDC, 15-28 VDC/0-10 mADC, 15-28 VDC/0-20 mADC, 15-28 VDC/0-10 VDC
N/A

“Indicator”  Style Diaphragm Type Gauges

Model No. Differential Pressure Range Accuracy Working Pressure Electrical Available Specifications Installation/ Operation Manual Electrical IOM Drawing
Model 522C3-Color Dial 0-5 PSID to 0-50 PSID ±5% 1,000 PSI CE / LVD, RoHS Compliant N/AN/A
Model 555A3-Color Dial 0-3.5 PSID to 0-43 PSID ±5% 300 PSI Not Available N/AN/A