A Wika Pressure Gauge is must in your car toolbox


A Wika pressure gauge measures the pressure of the fluid. It may be air, water or any other flowing material. 

Wika Pressure Gauge
Wika Pressure Gauge

A Wika pressure gauge measures the pressure of a fluid. It may be air, water or any other flowing material. They must set up and tune power machines and are indispensable in shooting them. It is used to measure pressure in a system, giving users a visual indication of the pressure level.

Issues with Pressure Gauges

The links and pinions of a pressure gauge are sensitive to vibration and condensation. The viscous oil in a pressure gauge protects the pointer from corrosion and maintains the working of the needle.

Working principle of pressure gauges

It is based on Hooke’s law. This law states that the force required to expand or compress a spring scales linearly regarding the distance of extension or compression. There is inner pressure and outer pressure. So, when the pressure is applied on the object’s surface, it is more on the inner side as the pressure is less.

Another principle the gauge uses is that a flattened tube straightens or regain circular form in cross-sections when pressurized.


  1. Wika pressure gauges

Wika Pressure Gauge is measured concerning the pressure in a full vacuum. The pressure at complete vacuum is zero.


Their applications include:

  • Measuring the vapour pressures of liquids.
  • Vacuum reactors.
  • Checking leakage in tanks and circuits.
  • Measuring the fall in the pressure of distillation.
  • Performing operations in the oil refining industry.

They are also used in the food packaging industry.

  1. Gauge pressure measuring devices

It is measured concerning the standard atmospheric pressure at sea level. This pressure is positive when greater than the atmospheric pressure and negative when less than the atmospheric pressure.

  1. Wireless pressure gauge

The wireless is the modern edition of gauges that can transfer the pressure reading directly to other devices. Mechanical pressured gauges don’t measure precisely. The advantage of this gauge is that we can collect the data remotely.


  1. Digital pressure gauge

They are commonly used with temporary industry applications that require highly accurate pressure reading—interpretation of reading on a digital scale. The pressure gauge eliminates chances for parallel error, and it rearranges easily.


A variety of pressure sensor designs measures different pressure conditions. The pressure then converts to displacement, which is based on the diaphragm.

The displacement transforms to voltage through the sensor. Given the general area of the diaphragm, you then calculate the pressure.


Wika Pressure Gauge Calibration Procedure

First, set the pointer to zero on the scale before applying it to the pressure gauge. Then apply full pressure to the gauge. The pointer should be at maximum full-scale deflection. Repeat until the pressure gauge is set to zero to have maximum full-scale deflection.


Wireless Pressure Transmitters 

Traditional wired pressure transmitters require a supporting infrastructure including wire, cabling, conduit, junction boxes, marshalling cabinets, and Input-Output to transmit the pressure signal back to the control system. This design sometimes makes installing pressure transmitters in certain locations too difficult or expensive.

A three-sensor wire consists of one load wire and two power wires. The power wires connect to the power supply, and the load wire connects to the programmable logic controller.

Types of Pressure Measurements 


Atmospheric Pressure measures use sensors to gauge pressure into the system. These setups are risky due to the humidity of the outside environment.


How much atmospheric pressure has been applied to seal an object determines the value of sealed pressure. The most common example of sealed pressure is a can of a glass bottle.


Absolute pressure measures the pressure in a vacuum, or the air is absent. Absolute pressure is often mixed with gauge pressure, but these are different pressures. The difference between the two is their zero point. The pointer on the zero refers to absolute zero on the absolute pressure measurement, while the pointer on the zero refers to atmospheric pressure on the gauge measurement device.


Differential pressure applies to all pressure, whether it be absolute or sealed. Differential pressure is the difference between a reference value and a measured value.

For example, if fluid’s pressure flowing in pipe A is at 100 pounds per square inch and the other at 70 psi, differential pressure would be 30 psi.

The differential system monitors the flow of fluid in industrial systems. It determines if the pipe has contamination as the particles flow through orifices and filters.

If clogging occurs in a pipe, a change in pressure occurs, which cause the differential pressure to increase or decrease.

A certain magnitude of differential pressure indicates whether the fluid flowing in the pipe is clean or contaminated with pollutants.


This article discussed gauges and their different types—the working principle of Hooke’s law.


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