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Mid-West Instrument Type 140/142 Diaphragm-Style Differential Pressure Switches

  • Total seperation of high and low by a convoluted elastomer diaphragm
  • Hermetically sealed read switches
  • Model 140 switch adjustable 10-90% of full scale ascending. Model 142 switch adjustable 15-95% of full scale ascending
  • Over-range protection to max pressure
  • Weatherproof rated to NEMA 4X/IP65
  • Accuracy ±2% Full Scale Ascending
  • Five year Limited Warranty
The Model 140/142 provides outstanding capabilities not previously available.
It is ideally suited for use on dissimilar fluids, wet gas or fluids with high concentration of solids, etc.
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50 variations of this product are available.

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50 PRODUCT OPTIONS
Compareitem specifications
Accuracy Max Pressure (PSI) Resolution
Availability Pricing
Mid-West Instrument 142-AA-00-O(AA)-20H Diaphragm Differential Pressure Switch, 20"WC, Al GZ-68403-20 Mfr # 142-AA-00-O(AA)-20H
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±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-25H Diaphragm Differential Pressure Switch, 25"WC, Al GZ-68403-21 Mfr # 142-AA-00-O(AA)-25H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-30H Diaphragm Differential Pressure Switch, 30"WC, Al GZ-68403-22 Mfr # 142-AA-00-O(AA)-30H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-40H Diaphragm Differential Pressure Switch, 40"WC, Al GZ-68403-23 Mfr # 142-AA-00-O(AA)-40H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-50H Diaphragm Differential Pressure Switch, 50"WC, Al GZ-68403-24 Mfr # 142-AA-00-O(AA)-50H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-60H Diaphragm Differential Pressure Switch, 60"WC, Al GZ-68403-25 Mfr # 142-AA-00-O(AA)-60H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-75H Diaphragm Differential Pressure Switch, 75"WC, Al GZ-68403-26 Mfr # 142-AA-00-O(AA)-75H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-100H Diaphragm Differential Pressure Switch, 100"WC, Al GZ-68403-27 Mfr # 142-AA-00-O(AA)-100H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-200H Diaphragm Differential Pressure Switch, 200"WC, Al GZ-68403-28 Mfr # 142-AA-00-O(AA)-200H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-300H Diaphragm Differential Pressure Switch, 300"WC, Al GZ-68403-29 Mfr # 142-AA-00-O(AA)-300H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-400H Diaphragm Differential Pressure Switch, 400"WC, Al GZ-68403-30 Mfr # 142-AA-00-O(AA)-400H
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-5P Diaphragm Differential Pressure Switch, 5 psid, Al GZ-68403-31 Mfr # 142-AA-00-O(AA)-5P
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-10P Diaphragm Differential Pressure Switch, 10 psid, Al GZ-68403-32 Mfr # 142-AA-00-O(AA)-10P
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-15P Diaphragm Differential Pressure Switch, 15 psid, Al GZ-68403-33 Mfr # 142-AA-00-O(AA)-15P
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-20P Diaphragm Differential Pressure Switch, 20 psid, Al GZ-68403-34 Mfr # 142-AA-00-O(AA)-20P
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-25P Diaphragm Differential Pressure Switch, 25 psid, Al GZ-68403-35 Mfr # 142-AA-00-O(AA)-25P
COMPARE
±2% full-scale (ascending)
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Mid-West Instrument 142-AA-00-O(AA)-30P Diaphragm Differential Pressure Switch, 30 psid, Al GZ-68403-36 Mfr # 142-AA-00-O(AA)-30P
COMPARE
±2% full-scale (ascending)
Call For Price
Mid-West Instrument 142-AA-00-O(AA)-50P Diaphragm Differential Pressure Switch, 50 psid, Al GZ-68403-37 Mfr # 142-AA-00-O(AA)-50P
COMPARE
±2% full-scale (ascending)
Call For Price
Mid-West Instrument 142-AA-00-O(AA)-75P Diaphragm Differential Pressure Switch, 75 psid, Al GZ-68403-38 Mfr # 142-AA-00-O(AA)-75P
COMPARE
±2% full-scale (ascending)
Call For Price
Mid-West Instrument 142-AA-00-O(AA)-100P Diaphragm Differential Pressure Switch, 100 psid, Al GZ-68403-39 Mfr # 142-AA-00-O(AA)-100P
COMPARE
±2% full-scale (ascending)
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Showing 1 - 20 of 50

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