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MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142 - Medium & High Operating Pressure Differential Gauges with Switch
MIDWEST INSTRUMENTMedium & High Operating Pressure Differential Gauges with Switch

MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142

The MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back is a medium and high operating pressure differential gauge with switch from the Series 142. It features a diaphragm sensor, aluminum housing, and a 2…

SKU 3G-OTH-174575

Also listed as: 142AA00OAA20P · 142 AA 00 O AA 20P · 142-AA-00-O-AA-20P

Brand
MIDWEST INSTRUMENT
Item
Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142
Category
Medium & High Operating Pressure Differential Gauges with Switch
Available to Order
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

MIDWEST INSTRUMENT
Manufacturer Part Number
142-AA-00-O(AA)-20P
Series
142
Type
142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-20P)
NPT Female
1/4 in
Sensor Type
Diaphragm
Gauge Accuracy
±3-2-3%
Housing Material
Aluminum
Certificate of Calibration
Not Included

Technical Documents

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MIDWEST INSTRUMENT Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back is a medium and high operating pressure differential gauge with switch from the Series 142. It features a diaphragm sensor, aluminum housing, and a 2 1/2 in dial with a gauge accuracy of ±3-2-3%. The unit has a 1/4 in NPT Female connection and does not include a certificate of calibration.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the MIDWEST INSTRUMENT 142 differential pressure gauge with switch used for?

This gauge monitors and controls differential pressure in medium to high operating pressure systems. Common applications include filtration monitoring, pump protection, and flow measurement in industrial HVAC, water treatment, and process plants where a local readout and switch output are needed.

What are the specifications of the MIDWEST INSTRUMENT 142-AA-00-O(AA)-20P?

The Series 142 gauge has a diaphragm sensor, aluminum housing, and a 2 1/2 in dial with ±3-2-3% accuracy. It uses a 1/4 in NPT Female back connection. The unit includes a switch but does not include a certificate of calibration. The MPN is 142-AA-00-O(AA)-20P.

Where to buy the MIDWEST INSTRUMENT 142 differential pressure gauge worldwide?

3G Electric supplies the MIDWEST INSTRUMENT 142 differential pressure gauge worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this Series 142 gauge.

How to install a MIDWEST INSTRUMENT differential pressure gauge with switch?

Mount the gauge using the 1/4 in NPT Female connection, ensuring the diaphragm sensor is oriented correctly for the process media. Wire the switch contacts per your control circuit voltage (typically 24 VDC or 120 VAC). Follow standard piping practices to avoid overpressure and vibration.

Used in

Common applications for MIDWEST INSTRUMENT
Filter monitoring in industrial water treatment — MIDWEST INSTRUMENT 522 series 3-color differential pressure indicators
Flow measurement in chemical processing — MIDWEST INSTRUMENT Series 120 piston-type differential pressure gauges
Liquid level indication in oil and gas storage tanks — MIDWEST INSTRUMENT Model 142 diaphragm-type differential pressure gauges
HVAC system filter condition monitoring — MIDWEST INSTRUMENT Series 130 differential pressure gauges with glass-reinforced plastic housing
Pump differential pressure monitoring in industrial plants — MIDWEST INSTRUMENT 522 series indicators with switch for alarm output

MIDWEST INSTRUMENT Products

3G Electric supplies MIDWEST INSTRUMENT medium & high operating pressure differential gauges with switch. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-15P)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-15P)
Medium and high operating pressure differential gauge with switch from the Series 142. Features a diaphragm sensor, aluminum housing, and 2 1/2 in dial with 1/4 in NPT Female back connection. Gauge accuracy is ±3-2-3%. Used for measuring and controlling pressure differences in industrial fluid systems such as filtration monitoring and pump protection
MIDWEST INSTRUMENT
Medium and high operating pressure differential gauge with switch from the Series 142. Features a diaphragm sensor, aluminum housing, and 2 1/2 in dial with 1/4 in NPT Female back connection. Gauge accuracy is ±3-2-3%. Used for measuring and controlling pressure differences in industrial fluid systems such as filtration monitoring and pump protection
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-50H)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-50H)
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-20H)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-20H)
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-100H)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 142, 2 1/2 in Dial (MPN 142-AA-00-O(AA)-100H)
This differential pressure gauge with switch from the Series 142 features a diaphragm sensor and an aluminum housing. It has a 2 1/2 in dial with ±3-2-3% accuracy and a 1/4 in NPT Female back connection. Suitable for monitoring and switching differential pressure in medium to high operating pressure systems such as industrial filtration, pump monitoring, and HVAC applications
MIDWEST INSTRUMENT
This differential pressure gauge with switch from the Series 142 features a diaphragm sensor and an aluminum housing. It has a 2 1/2 in dial with ±3-2-3% accuracy and a 1/4 in NPT Female back connection. Suitable for monitoring and switching differential pressure in medium to high operating pressure systems such as industrial filtration, pump monitoring, and HVAC applications

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Medium and high operating pressure differential gauge with switch from the Series 220. Features a piston sensor type, 316 stainless steel housing, and gauge accuracy of ±3-2-3%. Connections are 1/4 in NPT female with an IP65 4X rating. Suitable for monitoring and controlling differential pressure in industrial filtration, pump protection, and flow monitoring systems
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Medium and high operating pressure differential gauge with switch from the Series 220. Features a piston sensor type, 316 stainless steel housing, and gauge accuracy of ±3-2-3%. Connections are 1/4 in NPT female with an IP65 4X rating. Suitable for monitoring and controlling differential pressure in industrial filtration, pump protection, and flow monitoring systems
Medium and high operating pressure differential gauge with switch from the Series 120. Features a 4 1/2 in dial, 1/4 in NPT female connection, piston sensor, and 316 stainless steel housing. Accuracy is ±3-2-3%. Suitable for monitoring and switching in filtration, pump, and hydraulic systems
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Medium and high operating pressure differential gauge with switch from the Series 120. Features a 4 1/2 in dial, 1/4 in NPT female connection, piston sensor, and 316 stainless steel housing. Accuracy is ±3-2-3%. Suitable for monitoring and switching in filtration, pump, and hydraulic systems
This differential pressure gauge with switch from the Series 220 uses a piston sensor and a 316 stainless steel housing. It has 1/4 in NPT female connections, an IP65 4X enclosure rating, and a gauge accuracy of ±3-2-3%. Typical applications include monitoring differential pressure in medium to high pressure systems for filtration, pump protection, and flow measurement
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This differential pressure gauge with switch from the Series 220 uses a piston sensor and a 316 stainless steel housing. It has 1/4 in NPT female connections, an IP65 4X enclosure rating, and a gauge accuracy of ±3-2-3%. Typical applications include monitoring differential pressure in medium to high pressure systems for filtration, pump protection, and flow measurement
This differential pressure gauge with switch from the Series 142 features a diaphragm sensor and a 2 1/2 in dial. It has a 1/4 in NPT female back connection and a 316 stainless steel housing. Gauge accuracy is ±3-2-3%. Certificate of calibration is not included. Typical applications include monitoring filter condition, pump performance, and flow in industrial processes
MIDWEST INSTRUMENT
This differential pressure gauge with switch from the Series 142 features a diaphragm sensor and a 2 1/2 in dial. It has a 1/4 in NPT female back connection and a 316 stainless steel housing. Gauge accuracy is ±3-2-3%. Certificate of calibration is not included. Typical applications include monitoring filter condition, pump performance, and flow in industrial processes
This differential pressure gauge with switch from the Series 220 is designed for medium to high operating pressure systems. It features a piston sensor, 316 stainless steel housing, and 1/4 in NPT female connections. The gauge accuracy is ±3-2-3% and the enclosure is rated IP65 4X. Typical applications include monitoring differential pressure in filtration, pump systems, and flow measurement in industrial processes
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This differential pressure gauge with switch from the Series 220 is designed for medium to high operating pressure systems. It features a piston sensor, 316 stainless steel housing, and 1/4 in NPT female connections. The gauge accuracy is ±3-2-3% and the enclosure is rated IP65 4X. Typical applications include monitoring differential pressure in filtration, pump systems, and flow measurement in industrial processes
This medium and high operating pressure differential gauge integrates a switch for monitoring and control. It features a 2 1/2 in dial, 1/4 in NPT female connection, diaphragm sensor, and 316 stainless steel housing. Accuracy is ±3-2-3%. Suitable for industrial filtration, pump monitoring, and process control applications
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This medium and high operating pressure differential gauge integrates a switch for monitoring and control. It features a 2 1/2 in dial, 1/4 in NPT female connection, diaphragm sensor, and 316 stainless steel housing. Accuracy is ±3-2-3%. Suitable for industrial filtration, pump monitoring, and process control applications
This differential pressure gauge with switch from the Series 240 uses a diaphragm sensor and 316 stainless steel housing. It has a 1/4 in NPT female connection, ±3-2-3% accuracy, and an IP65 4X enclosure rating. Suitable for monitoring and controlling differential pressure in medium to high pressure systems such as filtration, pump monitoring, and flow measurement
MIDWEST INSTRUMENT
This differential pressure gauge with switch from the Series 240 uses a diaphragm sensor and 316 stainless steel housing. It has a 1/4 in NPT female connection, ±3-2-3% accuracy, and an IP65 4X enclosure rating. Suitable for monitoring and controlling differential pressure in medium to high pressure systems such as filtration, pump monitoring, and flow measurement
This Series 240 differential pressure gauge with switch features a diaphragm sensor and a 316 stainless steel housing. It has a 1/4 in NPT female connection, IP65 4X rating, and gauge accuracy of ±3-2-3%. Suitable for measuring and switching on differential pressure in medium to high operating pressure systems, commonly used in industrial filtration, pump monitoring, and process control
MIDWEST INSTRUMENT
This Series 240 differential pressure gauge with switch features a diaphragm sensor and a 316 stainless steel housing. It has a 1/4 in NPT female connection, IP65 4X rating, and gauge accuracy of ±3-2-3%. Suitable for measuring and switching on differential pressure in medium to high operating pressure systems, commonly used in industrial filtration, pump monitoring, and process control