Pressure gauges are analogue or digital instruments used to measure the pressure or vacuum within a fluid power system. Gauges are installed at any point within a machine where the pressure needs to be measured. By monitoring the pressure within a system, you can prevent damage or downtime caused by spikes in pressure. For a more in-depth overview, please see our pressure gauges guide.
Analogue pressure gauges
This type of gauge displays a pressure measurement on a dial. The needle is controlled by a spring or a tube that changes according to the pressure. It is important to ensure that your dial can read the pressure range within your system. Some pressure gauges can read up to 5000 psi or 7500 psi. The pressure scale range is also measured in "bar".
Digital pressure gauges
This type of gauge uses microprocessors and sensors to display pressure readings on an integrated digital output display. Digital pressure gauges are ideal for low pressures due to resolution scales ranging from 0.001 to 0.01. Digital pressure gauges are typically bottom entry and come in various diameters. These gauges can be used for hydraulic pressure and pneumatic pressure.
RS offer an extensive range of highly accurate devices from industry-leading brands including Bourdon, Fluke, WIKA, Druck, and of course RS PRO.
Calibration of your pressure gauge will ensure the instrument is operating correctly and within the manufacturer's specifications. Calibrated gauges will measure within the desired range and provide accurate readings. For more information on this, we offer in-house calibration services if required.
Other things to consider when choosing a pressure gauge include the operating temperature and the accuracy of the reading. Most gauges are mounted on a threaded connection, such as G 1/4, BSP 3/8 or NPT 1/2
What are pressure gauges made from?
Most standard pressure gauges are made from stainless steel or brass. However, there are lightweight alternatives such as plastic or aluminium options.
Where would I use one?
Pressure gauges are used in a wide range of industrial applications where it is necessary to measure the pressure is within normal limits. Some of the most common are:
Air conditioning systems
- Pneumatic & Hydraulic Pressure Gauges
- Bourdon G 1/4 Bottom Entry Pressure Gauge 6bar UKAS, 0bar min.
- WIKA G 1/8 Analogue Pressure Gauge 4bar Back Entry 0bar min.
- WIKA NPT 1/8 Analogue Pressure Gauge 4bar Back Entry 0bar min.
- G 1/2 Analogue Pressure Gauge 100bar Bottom Entry, 0bar min.
- G 1/2 Analogue Pressure Gauge 3bar Bottom Entry, -1bar min.
- G 1/2 Analogue Pressure Gauge 400bar Bottom Entry, 0bar min.