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MIDWEST INSTRUMENT Series 120 Differential Pressure Gauge with Switch - Medium & High Operating Pressure Differential Gauges with Switch
MIDWEST INSTRUMENTMedium & High Operating Pressure Differential Gauges with Switch

MIDWEST INSTRUMENT Series 120 Differential Pressure Gauge with Switch

The MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back is a medium and high operating pressure differential gauge with switch, part of the Series 120. It features a piston sensor type, an aluminum housing…

SKU 3G-OTH-174593

Also listed as: 120AA00OAA5P · 120AA 00 O AA 5P

Brand
MIDWEST INSTRUMENT
Item
Series 120 Differential Pressure Gauge with Switch
Category
Medium & High Operating Pressure Differential Gauges with Switch
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

MIDWEST INSTRUMENT
Manufacturer Part Number
120AA-00-O-AA-5P
Series
120
Type
120
Dial
2 1/2 in
NPT Female
1/4 in
Sensor Type
Piston
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, part of the Series 120. It features a piston sensor type, an aluminum housing, and a 2 1/2 in dial with 1/4 in NPT female connections. The gauge accuracy is ±3-2-3%, and a certificate of calibration is not included.

Frequently Asked Questions

What is the MIDWEST INSTRUMENT 120AA-00-O-AA-5P differential pressure gauge with switch used for?

This gauge with switch is used to measure and control differential pressure in medium to high operating pressure systems. Common applications include monitoring filter condition, pump performance, and flow in industrial hydraulic, pneumatic, and process lines where a local readout and switch output are needed.

What are the specifications of the MIDWEST INSTRUMENT Series 120 differential pressure gauge with switch?

The Series 120 model 120AA-00-O-AA-5P uses a piston sensor, has an aluminum housing, a 2 1/2 in dial, and 1/4 in NPT female back connections. Gauge accuracy is ±3-2-3%. It does not include a certificate of calibration. The switch is integrated for alarm or control at a set differential pressure.

Where to buy the MIDWEST INSTRUMENT 120AA-00-O-AA-5P differential pressure gauge with switch worldwide?

3G Electric supplies the MIDWEST INSTRUMENT 120AA-00-O-AA-5P differential pressure gauge with switch worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install a MIDWEST INSTRUMENT Series 120 differential pressure gauge with switch?

Mount the gauge using the 1/4 in NPT female back connection to the high- and low-pressure ports. Ensure the piston sensor is oriented correctly per the flow direction arrow. Wire the switch contacts according to your control circuit voltage (e.g., 24 VDC or 120 VAC). Avoid overtightening to prevent housing damage.

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, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-25P)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-25P)
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-10P)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-10P)
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-20P)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-20P)
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-15P)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-15P)
This differential pressure gauge with switch from the Series 120 is designed for medium to high operating pressure systems. It features a piston sensor, aluminum housing, and a 2 1/2 in dial with 1/4 in NPT female back connections. Gauge accuracy is ±3-2-3% of span. Certificate of calibration not included. Typical applications include industrial filtration, pump monitoring, and HVAC systems
MIDWEST INSTRUMENT
This differential pressure gauge with switch from the Series 120 is designed for medium to high operating pressure systems. It features a piston sensor, aluminum housing, and a 2 1/2 in dial with 1/4 in NPT female back connections. Gauge accuracy is ±3-2-3% of span. Certificate of calibration not included. Typical applications include industrial filtration, pump monitoring, and HVAC systems
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-50P)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge & Switch: Back, 1/4 in NPT Female, 120, 2 1/2 in Dial (MPN 120AA-00-O-AA-50P)

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