Products

Whether your business needs Piston and Diaphragm Type Differential Pressure Gauges, Switches, Indicators or Flow Test kits - Mid-West Instrument provides you with convenient online ordering.

Today Mid-West Instrument is world recognized as a leader and an innovator when it comes to the design and manufacturing of Differential Pressure Gauges. Mid-West Instrument has been manufacturing differential pressure related products for over 50 years. Our continued growth is due in part to companies like yours and responding to your needs with a cost effective, quality product every time.

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Mid-West Instrument operates a Quality Management System which complies with the requirements of CSA B51-09 (certificate of conformance)

NEW! 2014 Mid-West Instrument Catalog

 
2014 Catalog
 
   

 

Download 2014 Catalog pdf - (10.7 mb)

Today Mid-West Instrument is world recognized as a leader and an innovator when it comes to the design and manufacturing of Differential Pressure Gauges. Mid-West Instrument has been manufacturing differential pressure related products for over 50 years. Our continued growth is due in part to companies like yours and responding to your needs with a cost effective, quality product every time.

 

Piston Type Differential Pressure Gauges

 
model 120
model 122
 
 

MODEL 120

MODEL 122

 

About This Product

DP Range: 0-5 PSID (0-0.35 bar) thru 0-110 PSID (0-7 bar)

Mid-West Piston Type: Model 120 ± 2% or Model 122 ± 5% Full Scale Accuracy. Piston type gauges are primarily designed for liquid applications. Differential Pressure is sensed by the movement of a precisely ground floating piston/magnet in a precision bore against a calibrated spring. Any variation in pressure on either side of the piston/magnet will cause the magnet to move proportionally to the change in differential pressure.

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Diaphragm Type Differential Pressure Gauges

 
model 130
 
 

MODEL 130

 

About This Product

DP Range 130: 0-5 - H2O (0-12.4 mbar) thru 0-400 - H2O (0-1 bar)

The low range capability of the Model 130 is ideally suited for flow, liquid level and vacuum applications. Magnetic coupling between the sensing element and the indicating pointer provides for complete isolation of the process fluid within the pressure capsule. The few internal metal parts are 316L Stainless Steel.

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Diaphragm Type Differential Pressure Gauges

 
model 140
model 142
 
 

MODEL 140

MODEL 142

 

About This Product

DP Range 140: 0-25 PSID (0-1.7 bar) thru 0-100 PSID (0-7 bar)
DP Range 142: 0-20 In H2O (0-50mbar) thru 0-25 PSID (0-1.7 bar)

Mid-West Diaphragm Type: Models 140 & 142 ± 2% Full Scale Accuracy. The high and low-pressure ports are completely isolated from each other. There is no bypass and therefore they are best suited for air or gas along with liquids.

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Diaphragm Type Differential Pressure Gauges

 
model 522 3-color
 
 

MODEL 522 3 Color

 

About This Product

DP Range 522: 0-5 PSID thru 0-50 PSID

Mid-West Diaphragm Type: Models 522 ± 5% Full Scale Accuracy(Ascending). The Differential Pressure Gauge & Switch is a compact, weather resistant gauge for challenging DP Applications and installations when quickly identifying critical differential pressures are required.

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Differential Pressure Filter Indicator - Model 555A

 
model 555a
 
 

MODEL 555A

 

About This Product

Model 555A Differential Filter Indicator is designed for determining the state of an in-line filter. Indicator accuracy is ±5% Full Scale. Colored bands allow you to quickly identify pressure drop across element. Divided into three sections, each clearly marked for ease of understanding. Filtration systems require monitoring to maintain a level of performance specified by the manufacturer for the continued expectations of the end user.

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Flow Test Kits - Models 805, 806, 809, 820, 831, 841, 842, 843

 
flow products
 
     

About This Product

These test kits are built for just about any type of flow test measurement
scenario. Whether you are looking for a high accuracy portable test kit for flow indication and leak detection - or a more rugged medium accuracy portable test kit - Mid-West Instrument has designed and manufactured the RIGHT test kit for your budget and your application. Many models are available - all built to provide you with the test kit you need.

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Accessories

 
manifoldaccessoriesaccessories
 
     

About This Product

Mid-West Instruments has a selection of accessories to enhance your gauge's functionality.

Select from 3 & 5 valve single block instrument manifolds -
Needle valves offer a safe & economical method for regulating pressures up to 10,000 psi.
Model 150 Pulsation Dampeners to protect against surges &
pressure shocks -
Model 200 "Gauge Minder" Pressure Limiting Valve prevents instrument over-range.

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