About Pressure Gauges
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About Pressure Transmitters
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Low-Pressure Differential Gauges with Color Indicator
A band of green, yellow, and red provides a clear indication of changes in differential pressure. Gauges are commonly used to indicate clogged filters.
- For Use With: Air, Water, Hydraulic Fluid, Carbon Dioxide, Nitrogen, Hydrogen, Argon, and Acetylene
- Accuracy: ±5% Full Scale (Not Graded)
Pressure Range, psi | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Green Band | Yellow Band | Red Band | Max. Pressure, psi | Environment Temp. Range, °F | Process Temp. Range, °F | Ht. | Wd. | Dp. | Case Color | Each | |
NPT Female | ||||||||||||
| 1/4 | 0-13 | 13-20 | 20-30 | 300 | -40° to 200° | -40° to 200° | 3 1/4" | 3 1/4" | 1 1/2" | Black | 0000000 | 0000000 |
High-Pressure Differential Gauges
These gauges are able to withstand line pressures up to 3,000 psi. They are commonly used to measure pressure differences in pumps and filters.
Gauges with 316 stainless steel case are more corrosion resistant than gauges with an aluminum case.
- For Use With: Water, Hydraulic Fluid, and Gasoline
- Accuracy: ±2% Full Scale (Not Graded)
Available Pressure Ranges | ||
|---|---|---|
| Pressure Range, psi | Graduation Marks, psi | Numeric Increments, psi |
2 1/2" Dial Diameter | ||
| 0 to 20 | 1 | 5 |
4 1/2" Dial Diameter | ||
| 0 to 20 | 1 | 5 |
- For Use With: Water, Hydraulic Fluid, and Gasoline
- Accuracy: ±2% Full Scale (Not Graded)
Available Pressure Ranges | ||
|---|---|---|
| Pressure Range, psi | Graduation Marks, psi | Numeric Increments, psi |
2 1/2" Dial Diameter | ||
| 0 to 20 | 1 | 5 |
4 1/2" Dial Diameter | ||
| 0 to 20 | 1 | 5 |
Differential Pressure and Vacuum Gauges with Digital Display
Gauges have a four-digit LCD display for easy reading of measurements. Commonly used to indicate clogged filters, these gauges display the difference between two pressure or vacuum measurements. They are also known as compound gauges.
- For Use With: Air
- Accuracy: ±0.5% Full Scale (Not Graded)
Pressure Range | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| psi | kPa | in. of H₂O | mbar | Vacuum Range, in. of Hg | Resolution, in. of H₂O | Max. Pressure, psi | For Tube ID | Environment Temp. Range, °F | Process Temp. Range, °F | Digit Ht. | Batteries Included | Features | Each | |
Barbed Tube Connection | ||||||||||||||
| 0-20 | 0-137.9 | 0-553" | 0-1,379 | 40.72"-0 | 0.01 | 60 | 1/8"-3/16" | 35° to 100° | 0° to 140° | 3/8" | Yes | 40-Reading Memory, Overpressure Alarm | 0000000 | 0000000 |
Barbed Tube Connection with Calibration Certificate Traceable to NIST | ||||||||||||||
| 0-20 | 0-137.9 | 0-553" | 0-1,379 | 40.72"-0 | 0.01 | 60 | 1/8"-3/16" | 35° to 100° | 0° to 140° | 3/8" | Yes | 40-Reading Memory, Overpressure Alarm | 0000000 | 000000 |
Differential Pressure Transmitters for Liquids
Used with pumps, cooling systems, and other liquid applications, these transmitters remotely measure the difference in pressure between two inputs. They are also known as transducers. These transmitters convert differential 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. You’ll often see them used to indicate a filter is clogged.
For your receiving device to interpret the signal from the transmitter, you will need to calibrate it for the transmitter's differential pressure range and output signal. Transmitters will only provide accurate readings within the rated pressure range. Connect them using two wires. The same wire is used to send a signal to the receiver and to power the transmitter. Current doesn’t lose signal over long distances and isn’t affected by electrical interference from other devices.
IP56 rated transmitters protect against some dust and washdowns. NEMA 4 rated transmitters protect against weather and washdowns.
- For Use With: Hydraulic Fluid, Water
- Accuracy: ±1%
- Pipe Connection: NPT Female
- Connection Material: Brass
- Temperature Range: 32° to 122° F
Mounting Holes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Differential Pressure Range | Max. Input Pressure, psi | Input Voltage | Pipe Size | Mounting Hardware Included | Dia. | No. of | Ht. | Wd. | Environmental Rating | Each | |
4-20 mA Output Signal—Screw Terminals | |||||||||||
| 0-1 in. of H2O | 20 | 18-30V DC | 1/8 | No | 7/32" | 4 | 3 5/16" | 2 15/16" | IP56, NEMA 4 | 0000000 | 000000000 |
| 0-3 in. of H2O | 20 | 18-30V DC | 1/8 | No | 7/32" | 4 | 3 5/16" | 2 15/16" | IP56, NEMA 4 | 0000000 | 000000 |
| 0-5 in. of H2O | 20 | 18-30V DC | 1/8 | No | 7/32" | 4 | 3 5/16" | 2 15/16" | IP56, NEMA 4 | 0000000 | 000000 |
| 0-10 in. of H2O | 20 | 18-30V DC | 1/8 | No | 7/32" | 4 | 3 5/16" | 2 15/16" | IP56, NEMA 4 | 0000000 | 000000 |
| 0-25 in. of H2O | 20 | 18-30V DC | 1/8 | No | 7/32" | 4 | 3 5/16" | 2 15/16" | IP56, NEMA 4 | 0000000 | 000000 |
| 0-1 psi | 20 | 18-30V DC | 1/8 | No | 7/32" | 4 | 3 5/16" | 2 15/16" | IP56, NEMA 4 | 0000000 | 000000 |
Submersible Liquid-Level Transmitters
Best for measuring liquid levels in applications where traditional mounting is difficult, these transmitters sit at the bottom of your tank. They sense liquid levels by measuring the pressure from the weight of the liquid above them. These transmitters continuously send measurements, so you can monitor the status and manage components in your system. Also known as level loggers, level sensors, and pressure transducers.
Transmitters for liquids with solids have sink weights that keep the transmitter in place in applications with moving solids or agitated liquids.
For Pressure Range | Overall | Temp. Range, °F | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ft. of H2O | psi | Accuracy | Max. Pressure | Dia. | Lg. | Min. | Max. | Cable Lg., ft. | Input Voltage | For Container Type | Electrical Connection Type | Environmental Rating | Each | |
4-20mA Output Current | ||||||||||||||
For Liquids | ||||||||||||||
| 0-46 | 0-20 | ±0.5% | 30 psi @ 70° F | 1" | 5 5/8" | 32° | 140° | 60 | 12-36V DC | Closed Tank, Open Tank | Wire Leads | IP68 | 0000000 | 0000000 |
For Liquids with Solids | ||||||||||||||
| 0-46 | 0-20 | ±0.5% | 30 psi @ 70° F | 3 1/4" | 5 1/4" | 32° | 140° | 60 | 12-36V DC | Closed Tank, Open Tank | Wire Leads | IP68 | 0000000 | 000000 |
Pressure Recording Film
Create an instant, permanent image of pressure distribution and magnitude. These sheets of film help you identify uneven pressure that can lead to leaks and stress fractures. Use them between any two surfaces that touch each other, such as bolted joints, welding fixtures, and jigs. Tiny capsules within the film burst at specific pressure levels, causing the film to change color. This produces an instant map of pressure variation, similar to a heat map. For a custom size, cut the film with scissors.
Film that includes two sheets must be used together.
Pressure Film | ||||||
|---|---|---|---|---|---|---|
| Pressure Range, psi | Image Produced | Temp. Range, °F | Includes | Accuracy | Each | |
11" × 17" | ||||||
0.02" Thick. | ||||||
| 2-20 | Grayscale | 0° to 150° | Two 0.01" Thick Sheets | Not Rated | 0000000 | 000000 |
Tire Pressure Gauges with Indicator Bar
A bar slides out of the top of these gauges to display pressure reading.
Stainless steel gauges are more corrosion resistant than steel and brass gauges.
