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.
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.
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.
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.
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.
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.
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.
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.