WIKA S-20 Pressure Transmitter

What is a pressure transmitter?


Welcome to this new “What is…” blog post. In this edition, you will read all about pressure transmitters. A pressure transmitter is a mechanical device that translates the expansive force of a liquid or gaseous sample into an electrical output. This device converts the pressure through a transducer into an electrical signal. It’s usually made of a metal or silicon, but it can also be made out of other materials. This depends on the composition of the measured liquid or gas.

Why use a pressure transmitter?

Pressure transmitters are used in a wide range of industrial sectors. For example, oil exploration. In this sector, pressure sensors are used to measure differences in value between the interior and exterior of pressure sensitive equipment. Most pressure transmitters are very durable, being able to withstand any environment with a long service life. What makes pressure transmitters applicable in a wide range of cases, is that they can be connected to other systems, such as electrical circuits.

How does a pressure transmitter work?

Of course, there are many different types of pressure transmitters. But despite this fact, they work pretty much the same way. Pressure transmitters work by measuring pressure and converting it into an analogue electrical signal. In general, a pressure transmitter consists of three main components:

  1. Pressure sensor
  2. Measuring circuit
  3. Process connection

The installation of a pressure transmitter measurement system consists of three parts:

  1. Pressure guiding tube
  2. Central measuring diaphragm
  3. Isolating diaphragm (containing silicone oil)

During the operation of the pressure transmitter, the pressure of the medium is transmitted to the central measuring diaphragm, where the membrane is measured. The sheet between these parts is deformed by the pressure difference. When this deformation is measured, the amount of pressure difference can be measured. This measured pressure difference is converted into an analogue electrical sign and can now be perceived.


We are specialized in choosing the right pressure transmitter for you. So please don’t hesitate to contact one of our specialists when looking for the best pressure transmitter. They are there for all your questions and will make sure that you can make the perfect choice.

General contact

Driemanssteeweg 190
3084 CB Rotterdam
The Netherlands
GMS Instruments Office