Specialised Pressure Gauges

A vacuum gauge measures vacuum pressure, which is lower than atmospheric pressure. They are employed in a number of commercial and industrial applications. We calibrate, repair and supply new vacuum gauges from -30inHg to 15psi. 

Absolute pressure gauges or Torr gauges as they are sometimes referred to are sealed instruments that measure the actual pressure applied regardless of any change in atmospheric pressure, whereas a pressure gauge measures the pressure relative to the atmospheric pressure of the day. We have a vacuum chamber specially designed to calibrate absolute pressure gauges. 

Digital pressure gauges measure pressure and display the value on an digital display. These gauges fulfil the same purpose as regular gauges but store and transmit pressure data electronically. We calibrate, repair and supply new digital pressure gauges from absolute vacuum up to 60,000psi.

- Data Logging Gauges

- High Pressure / Accuracy / Hygienic
- Digital Manometers - Absolute / Standard
- Local / Remote Displays

Diaphragm gauges serve as pressure measuring instruments featuring a barrier between the process medium and the bourdon tube measuring system within the gauge. This protective barrier prevents the process medium from obstructing or corroding a standard bourdon tube gauge. Diaphragms can be crafted from various materials to withstand aggressive process mediums.

- Hygienic Seal Gauges
- In-Line Hygienic Seal Gauges
- Varivent Seal Gauges
- Chemical Seal Gauges
- Flanged Diaphragm Gauges
- Homogeniser Seal Gauges
- Schaeffer Diaphragm Gauges

A differential gauge is engineered to measure pressure disparities between two sources, whether it's gas, air, or liquid applications. Upon installation, one port connects to the low side while the other links to the high side, displaying the pressure drop on the gauge's interface.

- 1.5bar - 400bar max static differential
- Subsea (450 metres depth)
- Duplex Gauges (Train Braking Gauges)
- Bourdon Tube Differential Gauges

Magnehelic Low Pressure Differential Gauges are versatile tools for measuring differential pressure across various applications. Featuring a frictionless movement, these gauges swiftly indicate low air or non-corrosive gas pressures—be it positive, negative (vacuum), or differential. Their robust design ensures resistance against shock, vibration, and over-pressures, guaranteeing reliable performance even in demanding environments.

- Capsuhelic Gauges

- Digihelic Gauges
- Minihelic Gauges
- Photohelic Gauges

A manometer is a pressure measuring instrument, typically using fluid, created to gauge the pressure variance between two distinct points. It accomplishes this by balancing the weight of a fluid column between the two points.

Micromanometers are similar to other manometer types, but they are specifically designed to measure very small pressure differences. These instruments are highly sensitive and are well suited to taking accurate, precise readings of the smallest differences. We can calibrate, repair and supply new a wide array of micromanometers. 

Subsea pressure gauges, caisson gauges and diving gauges are designed to read pressure independent of depth. They  feature a fully filled case with a unique compensation mechanism. This enables the internals of the case to be pressurised to match the external ambient pressure as the gauge descends to depth. This approach eliminates the need for a pressure-proof case, making them suitable for the most extreme depth applications.

- 0 - 4000 metres depth

Pressure gauge accuracy refers to the deviation (error) between the true value and the displayed reading, presented as a percentage of the full-scale span. In mechanical pressure gauges, accuracy is typically defined as a percentage of the full-scale range. It's crucial to select a gauge with specifications suitable for its intended application. Using a gauge with insufficient accuracy can lead to flawed measurements, while opting for overly accurate gauges increases procurement, calibration, and maintenance costs.

- Test gauges and standards: 0.25% to 0.10% FSD (Full Scale Deflection)

- Critical processes: 0.5% FSD

- General industrial processes: 1.0% FSD accuracy

- Less critical commercial uses: 1.6% or 2.0% FSD accuracy

HVAC stands for heating, ventilation, and air conditioning, and it refers to a cost-effective gauge specifically tailored for commercial use within the industry.

Tank gauges are specifically engineered for assessing the volume or level of substances within a tank. They can operate through electronic means or utilise analog displays for manual readings. Typically, a sensor is positioned either inside or outside the tank, where hydrostatic pressure transforms into precise volume or level measurements.

We often receive calls from traction engine / steam engine hobbyists & heritage railway trusts who require vintage designed brass gauges. We can design these to any specification required.