Nitrogen Indicators | McMaster-Carr

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Warning: Products have one, but not necessarily all, of the selected characteristics.

	Pipe Size Pipe Size

1/8

1/4

1/2

	Thread Type Thread Type

	Scale Scale

	Measures Measures

Differential Pressure

Pressure

Vacuum

	Connection Location Connection Location

	Bottom		Center Back

	System of Measurement System of Measurement

Inch

	Dial Diameter Dial Diameter

	Scale Type Scale Type


Single	Dual

	Connection Material Connection Material

	Case Material Case Material

	Dial Type Dial Type

	Dry

	Gender Gender

Female

Male

	Connection Style Connection Style

	Connection Type Connection Type

	Display Type Display Type

Dial

Digital

Color Band

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Accuracy Grade Accuracy Grade

Not Graded

	Lens Material Lens Material

Plastic

Glass

	Mounting Orientation Mounting Orientation

Any Angle

Upright

	Accuracy Scale Accuracy Scale

Mid Scale

Full Scale

	Maximum Process Temperature Maximum Process Temperature

	Maximum Environment Temperature Maximum Environment Temperature

	Minimum Environment Temperature Minimum Environment Temperature

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447 Products

About Pressure Gauges

Pressure Gauges

These are the most commonly used pressure gauges. Use them with pumps, filters, regulators, and in process lines to measure and display pressure.

Miniature Pressure Gauges

The small dial on these gauges allows for installation in tight spaces.

Digital High-Accuracy Pressure Gauges

A digital display allows for easy reading of measurements.

High-Accuracy Low-Pressure Gauges

Measure small pressure changes in ventilation systems, hydraulic applications, and other critical processes.

Low-Pressure Differential Gauges with Color Indicator

A band of green, yellow, and red provides a clear indication of changes in differential pressure.

Gauge Guards

Also known as isolators or diaphragm seals, these protect gauges from corrosive process media.

Pressure and Vacuum Transmitters

Convert both pressure and vacuum into an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls to monitor pressure or control equipment.

Pressure and Vacuum Transmitters with Digital Display

Monitor and control vacuum pumps, air compressors, and hydraulics while viewing readings and warnings on a display. With two outputs, these transmitters—also known as transducers—can be used as a transmitter, a switch, or both.

Easy-Setup Pressure and Vacuum Transmitters

These transmitters automatically compensate for error introduced into both pressure and vacuum measurements by vibrations as well as temperature fluctuations, so you do not need to program corrections for these factors into your receiving device. They convert pressure and vacuum to an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls to monitor pressure or control equipment.

Sanitary Easy-Setup Pressure
and Vacuum Transmitters

Designed for sanitary environments, these transmitters automatically compensate for error in vacuum and pressure measurements caused by vibration and temperature fluctuations, so you don’t need to program corrections into your receiving device.

Hazardous Location Easy-Setup
Pressure and Vacuum Transmitters

Used in hazardous locations, these transmitters safely convert pressure and vacuum into an electrical signal to measure liquids, gases, and steam. NEC rated for safety, these transmitters are explosion proof, so they can be used in environments containing flammable gases and vapors.

Vacuum Transmitters

Convert vacuum into an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls to monitor vacuum or control equipment.

Sanitary Easy-Setup Vacuum Transmitters

Monitor and control equipment in food-processing and pharmaceutical plants—these transmitters convert vacuum into electrical signals for receiving devices and have a 3-A certified sanitary design. They automatically compensate for vibration and temperature changes, saving you the effort of programming manual corrections.

Pressure Transmitters

Pressure Transmitters with Digital Display

Read pressure directly at the source and send data remotely with one device.

Absolute Pressure Transmitters
for Development Boards

Measure your equipment’s pressure and send the data directly to a development board or single-board computer. Also known as transducers, these transmitters convert pressure into an electrical I²C signal and transmit it to your board.

Wireless Pressure Transmitters

Remotely track your system's pressure readings from the convenience of a smartphone or tablet. Good for preventative maintenance and route-based monitoring, these battery-powered transmitters use Bluetooth to alert you when equipment requires your attention.

Sanitary Pressure Transmitters

For use in sanitary applications such as food processing, these transmitters are 3-A certified.

Pressure Transmitters

Remotely monitor pressure in general purpose applications such as pumping and compressing systems.

Absolute Pressure Transmitters

Monitor and control pressure in portable HVAC systems, hydraulics, and oil and gas equipment. Unlike other pressure transmitters that measure the difference between your system and the atmosphere, these transmitters give measurements relative to zero pressure—regardless of altitude or temperature.

High-Accuracy Pressure Transmitters

At least five times as accurate as standard pressure transmitters, these transmitters sense pressure at an accuracy of ±0.1%, making them ideal for use in laboratories and in analytical testing applications.

Easy-Setup Pressure Transmitters

These transmitters automatically compensate for error introduced by vibration as well as temperature fluctuations, so you do not need to program your receiving device to correct for these factors. They convert pressure to an electrical signal that can be interpreted by receiving devices, such as remote displays, programmable logic controllers, and motor speed controls to monitor pressure or control equipment.

Hazardous Location Easy-Setup Pressure Transmitters

Safely monitor liquid, gas, and steam pressure in hazardous locations with these transmitters. They meet NEC safety standards, so they protect against an explosion where flammable gases and vapors are present.

Sanitary Easy-Setup Pressure Transmitters

Used in food-processing and pharmaceutical plants to automatically compensate for temperature changes and errors caused by vibration, these transmitters have a sanitary design certified by 3-A.

Differential Pressure Transmitters

Measure the difference in pressure between two points in flow applications, such as heating, cooling, and pumping systems.

Hazardous Location Easy-Setup
Differential Pressure Transmitters

For use in hazardous locations, these transmitters safely measure the difference in pressure between two process lines in flow applications—such as heat exchangers, chillers, and pumps. They meet NEC safety standards, so they protect against an explosion where flammable gases and vapors are present.

Easy-Setup Differential Pressure Transmitters

Measure the difference in pressure between two process lines in flow applications such as heat exchangers, chillers, and pumps. These transmitters automatically compensate for error introduced by vibration as well as temperature fluctuations, so you do not need to program your receiving device to correct for these factors.

Low-Pressure Differential Pressure Transmitters

Often used in HVAC systems and clean room airflow monitoring applications, these transmitters measure the difference in pressure between two low-pressure process lines.

High-Accuracy Test Gauges for Pressure

With an accuracy of ±0.25%, these gauges are designed for critical processes that require precision.

Charging and Gauging Kits for Hydraulic Accumulators