Manometers

Manometers are instruments used to measure the pressure of liquids and gases, and are vital for maintaining and troubleshooting equipment that uses gas or liquid to operate. Most modern manometers are compact and portable digital instruments that offer greater levels of accuracy, safety and ease of use than older types featuring a U-shaped glass tube filled with liquid mercury.

What are the features of manometers?

Modern manometers are handheld, battery operated and have clear digital screens so that results can be easily read even in awkward places or in bright or dim light. Hi-tech sensors and sophisticated microprocessors give highly accurate readings, while many come with software that allows data to be transferred to laptops, smartphones or tablets for storage or analysis.

Most digital manometers have memory capacity for data logging. A range of maximum pressure measurements are available, and some models are designed to be intrinsically safe for use in hazardous environments.

How do manometers work?

Digital and analogue manometers work on the same principle of fluid displacement. In traditional U-tubed manometers, water fills the tube before a gas line introduces pressure to displace the water. The height to which the water rises is then measured on an analogue scale.

The modern digital manometer can accurately reproduce this process electronically, with pressures typically displayed in pounds per square inch (PSI). They can measure absolute pressure, differential pressure, and gauge pressure. In conjunction with a pitot tube, a manometer can convert pressure readings into air velocity (FPM).

Where are manometers used?

Manometers are used to measure air, gas or fluid pressure in commercial, domestic and industrial environments to ensure that levels remain optimal and safe. They can also be used to troubleshoot system failures and seek out leaks, and are commonly used for food processing, research and education.

In refrigeration systems, digital pressure meters can gauge pressure, vacuum and temperature. They can also help to establish flow and static pressure in gas systems, or be used for pressure-drop testing in gas pipes.


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Description Price Best Accuracy Calibrated Number of Pressure Ports Maximum Pressure Measurement Minimum Pressure Measurement Pressure Port Type Leak Testing Minimum/Maximum Recordings Data Logging Intrinsically Safe IP Rating Battery Type Display Type Overpressure Maximum
RS Stock No. 146-7721
BrandRS PRO
$1,362.14
Each
units
±0.1 % - - 10bar 0bar Absolute Yes Yes - No IP54 Alkaline LCD 10bar
RS Stock No. 146-7719
BrandRS PRO
$933.31
Each
units
±0.1 % - 1 1bar 0bar Differential Yes Yes - No IP54 Alkaline LCD 1bar
RS Stock No. 146-7720
BrandRS PRO
$1,009.38
Each
units
±0.1 % - 1 7bar 0bar Gauge Yes Yes - No IP54 Alkaline LCD 7bar
RS Stock No. 144-5336
BrandRS PRO
$275.12
Each
units
±0.3 % - 2 0.137 bar, 0.14 kgcm², 2 psi, 4.072 inHg, 4.612 ftH2O, 13.79 kPa, 32 ozin², 55.4 inH2O, 103.4 mmHg, 137.8 psi, 140.6 cmH2O -2psi Differential, Gauge - Yes - - - 9V LCD -
RS Stock No. 146-7722
BrandRS PRO
$1,362.14
Each
units
±0.1 % - - 20bar 0bar Gauge Yes Yes - No IP54 Alkaline LCD 20bar
RS Stock No. 146-7723
BrandRS PRO
$1,362.14
Each
units
±0.1 % - 1 700bar 0bar Absolute Yes Yes - No IP54 Alkaline LCD 700bar
RS Stock No. 146-7718
BrandRS PRO
$1,362.14
Each
units
±0.1 % - - 350mbar 0mbar Differential Yes Yes - No IP54 Alkaline LCD 350mbar
RS Stock No. 146-7717
BrandRS PRO
$933.31
Each
units
±0.1 % - 2 70mbar 0mbar Differential Yes Yes - No IP54 Alkaline LCD 70mbar
RS Stock No. 2552269676
Mfr. Part No.RS8890 AU Std CAL
BrandRS PRO
$415.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 460-9780
Mfr. Part No.PM-80
BrandDigitron
$610.04
Each
units
±0.2 % - 2 130mbar 0mbar Differential - - - - IP65, IP67 AA LCD 1bar
RS Stock No. 287-636
Mfr. Part No.FLUKE 922/KIT
BrandFluke
$1,575.09
Each
units
±1% +0.01 mbar - - 40mbar - Differential - Yes Yes - IP40 AA LCD -
RS Stock No. 312-0523
Mfr. Part No.I705-13G-2388
BrandDruck
$1,388.38
Each
units
±0.1 % - 1 20bar 0bar - Yes Yes - - IP54 AA LCD 40bar
RS Stock No. 245-1236
Mfr. Part No.C9555
BrandComark
$648.51
Each
units
±0.2 % - 2 2.1bar 0bar Differential - Yes - No IP67 9V LCD 6200mbar
RS Stock No. 920-5188
Mfr. Part No.0563 0510
BrandTesto
$298.02
Each
units
+1.5 (0.40 → 40 inH2O) %, +1.5 (1.01 → 100 hPa) % - 2 40.15 inH2O, 100 hPa 0 hPa, 0 inH2O Differential - - - - IP40 AAA Backlit LCD -
RS Stock No. 312-0517
Mfr. Part No.I705-07G-2388
BrandDruck
$960.20
Each
units
±0.1 % - 1 2bar 0bar Gauge Yes Yes - - IP54 AA LCD 4bar
RS Stock No. 850-7672
Mfr. Part No.FLUKE 922
BrandFluke
$1,279.83
Each
units
±1 % - - 6psi -6psi Differential - Yes Yes - IP40 AA LCD -
RS Stock No. 437-8931
Mfr. Part No.PM-20
BrandDigitron
$535.36
Each
units
±0.2 % - 2 130mbar 0bar Differential - - - - IP67 AA LCD -
RS Stock No. 313-0233
Mfr. Part No.2023P7
BrandDigitron
$1,749.07
Each
units
±0.15% + 0.0105 bar + 1 Digit - 2 7bar 0bar Differential - Yes - - IP67 AA LCD 10bar
RS Stock No. 313-0205
Mfr. Part No.2022P7
BrandDigitron
$1,066.09
Each
units
±0.15% + 0.003 bar + 1 Digit - 2 2bar 0bar Differential - Yes - - IP67 AA LCD 4bar
RS Stock No. 539-5072
Mfr. Part No.2028P7
BrandDigitron
$694.69
Each
units
±0.15% + 0.0015 bar + 1 Digit - 2 1bar 0bar Differential - Yes - - IP67 AA LCD 2bar
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