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

MIDWEST INSTRUMENT Series 120 Differential Pressure Gauge

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

SKU 3G-OTH-175092

Also listed as: 120AA00OO5P · 120 AA 00 OO 5P

Brand
MIDWEST INSTRUMENT
Item
Series 120 Differential Pressure Gauge
Part Number
120-AA-00-OO-5P
Category
Medium & High Operating Pressure Differential Gauges
Available to Order
Also known as:120-AA-00-OO-5PMIDWEST INSTRUMENT
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Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Compliance & shipping

Hazardous material
Not classified as hazardous
California Prop 65 warning
No warning recorded
Licence required
No licence required
Safety Data Sheet
Not available
Special shipping
Ships under standard freight

Technical Specifications

MIDWEST INSTRUMENT
Manufacturer Part Number
120-AA-00-OO-5P
Series
120
Type
±3-2-3% Gauge Accuracy, 120
UNSPSC
41112403
Includes
Instructions
IP Rating
IP65
Standards
CSA; UL
Case Depth
0.75 in
Gauge Type
Differential Pressure Gauge
NPT Female
1/4 in
Relay Type
Piston type Differential Pressure Gauge. Common applications for Filters, Strainers, Compressed Air, Hydraulic, Refrigerant, Pump Performance Testing, Heat Exchanger. 5 Year Warranty.
Sensor Type
Piston
Catalog Page
547
Non-Sparking
No
Case Diameter
3 in
Case Material
Plastic
Catalog Group
D0754
Lens Material
Acrylic
Mounting Type
Panel-Mount
Seal Material
Buna-N
Gauge Accuracy
±3-2-3%
IP/NEMA Rating
IP65 4X
Panel-Mountable
Yes
Removable Bezel
No
Sensor Material
Buna-N
Accuracy Details
ASME B40.1 Grade B
Housing Material
Aluminum
Country of Origin
USA (subject to change)
Nominal Dial Size
2-1/2 in
Includes Vent Plug
No
Number of Switches
0
Blowout Safety Back
No
Bolt Circle Diameter
3.5 in
Adjustable Set Points
Yes
Bezel Gasket Material
Buna-N
Wetted Parts Material
Ceramic/Stainless Steel / Buna-N
Process Connection Size
1/4 in
Process Connection Type
NPT
Process Connection Gender
Female
Socket Material - TS Only
Ceramic/Stainless Steel
Certificate of Calibration
Not Included
Includes Mounting Hardware
No
Process Connection Location
Back
Manufacturer Warranty Length
5 yr
Pressure Measurement - Maximum
5 psid
Pressure Measurement - Minimum
0 psid
Maximum Working Static Pressure
3,000 psig Maximum Working Static Pressure Maximum working static pressure refers to the absolute maximum pressure of a system versus the differential pressure between two sides of a system.
Operating Temperature - Maximum
200 °F
Operating Temperature - Minimum
-40 °F
Includes Calibration Certificate
No
Pressure Scale Minor Graduations
0.2
Process Media Temperature - Maximum
200 °F
Process Media Temperature - Minimum
-40 °F
hidden - max pressure differentiator
3,000 psig x For High Operating Pressure

Technical Documents

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

Product Description

The MIDWEST INSTRUMENT Differential Pressure Gauge: Back is a medium and high operating pressure differential gauge from the Series 120. It features a piston sensor type, an aluminum housing, and a gauge accuracy of ±3-2-3%. The model 120-AA-00-OO-5P has a 1/4 in NPT Female connection and does not include a certificate of calibration.

Frequently Asked Questions

What is the MIDWEST INSTRUMENT Series 120 differential pressure gauge used for?

The MIDWEST INSTRUMENT Series 120 differential pressure gauge is used for measuring pressure differences in medium and high operating pressure systems. Common applications include filtration monitoring, pump performance checks, and flow measurement in industrial processes where a piston sensor provides reliable readings.

What are the specifications of the MIDWEST INSTRUMENT 120-AA-00-OO-5P differential pressure gauge?

The MIDWEST INSTRUMENT 120-AA-00-OO-5P is a Series 120 differential pressure gauge with a piston sensor, ±3-2-3% gauge accuracy, and an aluminum housing. It has a 1/4 in NPT Female back connection and does not include a certificate of calibration.

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

You can source the MIDWEST INSTRUMENT 120-AA-00-OO-5P differential pressure gauge through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the gauge reaches your facility reliably.

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

Install the MIDWEST INSTRUMENT Series 120 gauge by connecting the 1/4 in NPT Female ports to the process lines, ensuring proper sealing with thread tape. Mount the aluminum housing securely, avoid overtightening, and verify zero calibration before pressurizing. Follow standard piping best practices for differential pressure gauges.

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
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MIDWEST INSTRUMENT Products

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

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MIDWEST INSTRUMENT Differential Pressure Gauge: Back, 1/4 in NPT Female, ±3-2-3% Gauge Accuracy, 120 (MPN 120-AA-00-OO-50P)
MIDWEST INSTRUMENT
MIDWEST INSTRUMENT Differential Pressure Gauge: Back, 1/4 in NPT Female, ±3-2-3% Gauge Accuracy, 120 (MPN 120-AA-00-OO-50P)
This differential pressure gauge from the Series 140 uses a diaphragm sensor to measure pressure differences in fluid or gas systems. It features a 1/4 in NPT female connection, an aluminum housing, and ±3-2-3% gauge accuracy. Suitable for medium to high operating pressure applications such as filtration monitoring and flow measurement
MIDWEST INSTRUMENT
This differential pressure gauge from the Series 140 uses a diaphragm sensor to measure pressure differences in fluid or gas systems. It features a 1/4 in NPT female connection, an aluminum housing, and ±3-2-3% gauge accuracy. Suitable for medium to high operating pressure applications such as filtration monitoring and flow measurement
This differential pressure gauge from the Model 142 series features a 4 1/2 in dial and a diaphragm sensor type. It has a 1/4 in NPT Female back connection and an aluminum housing. Designed for medium and high operating pressure applications, it is used to measure pressure differences in industrial fluid or gas systems, such as monitoring filters, pumps, and flow in pipelines. Certificate of calibration is not included
MIDWEST INSTRUMENT
This differential pressure gauge from the Model 142 series features a 4 1/2 in dial and a diaphragm sensor type. It has a 1/4 in NPT Female back connection and an aluminum housing. Designed for medium and high operating pressure applications, it is used to measure pressure differences in industrial fluid or gas systems, such as monitoring filters, pumps, and flow in pipelines. Certificate of calibration is not included
This differential pressure gauge from the Series 140 uses a diaphragm sensor and aluminum housing to measure pressure differences in medium and high operating pressure systems. It features a 1/4 in NPT Female back connection and ±3-2-3% gauge accuracy. Certificate of calibration is not included
MIDWEST INSTRUMENT
This differential pressure gauge from the Series 140 uses a diaphragm sensor and aluminum housing to measure pressure differences in medium and high operating pressure systems. It features a 1/4 in NPT Female back connection and ±3-2-3% gauge accuracy. Certificate of calibration is not included
This differential pressure gauge from the Series 142 features a diaphragm sensor and an aluminum housing. It offers ±3-2-3% gauge accuracy and has a 1/4 in NPT Female back connection. Suitable for measuring pressure differences in medium and high operating pressure systems, it is commonly used for filter monitoring, flow measurement, and level indication in industrial processes
MIDWEST INSTRUMENT
This differential pressure gauge from the Series 142 features a diaphragm sensor and an aluminum housing. It offers ±3-2-3% gauge accuracy and has a 1/4 in NPT Female back connection. Suitable for measuring pressure differences in medium and high operating pressure systems, it is commonly used for filter monitoring, flow measurement, and level indication in industrial processes
The MIDWEST INSTRUMENT Series 140 differential pressure gauge uses a diaphragm sensor to measure pressure differences in medium and high operating pressure systems. It features a 316 stainless steel housing, ±3-2-3% gauge accuracy, and a 1/4 in NPT female connection. Typical applications include filtration monitoring, pump performance checks, and flow measurement in industrial processes
MIDWEST INSTRUMENT
The MIDWEST INSTRUMENT Series 140 differential pressure gauge uses a diaphragm sensor to measure pressure differences in medium and high operating pressure systems. It features a 316 stainless steel housing, ±3-2-3% gauge accuracy, and a 1/4 in NPT female connection. Typical applications include filtration monitoring, pump performance checks, and flow measurement in industrial processes
This differential pressure gauge from the Series 130 features a diaphragm sensor and ±5% gauge accuracy. The housing is made of glass reinforced plastic, and the connection is 1/4 in NPT female. It is used to measure pressure differences across filters, pumps, or flow elements in industrial processes such as HVAC, water treatment, and chemical applications
MIDWEST INSTRUMENT
This differential pressure gauge from the Series 130 features a diaphragm sensor and ±5% gauge accuracy. The housing is made of glass reinforced plastic, and the connection is 1/4 in NPT female. It is used to measure pressure differences across filters, pumps, or flow elements in industrial processes such as HVAC, water treatment, and chemical applications

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