Differential pressure gauge in an ex-zone

An ex-zone is an area in which flammable gases, vapours, mists or dust can mix with air in such a way that one single spark is sufficient to detonate the mixture. If electrical equipment is operated in an ex-zone, it must be guaranteed that it will not become an ignition source.

Classification as a hazardous area

The classification of a room as a potentially explosive atmosphere is based on the nature of the flammable substances contained and the probability that these substances will create an explosive atmosphere.
If gases, vapours or mists are present, the room is assigned zone 0, 1 or 2. Zone 0 is frequent, Zone 1 is occasional and Zone 2 is seldom likely to contain explosive mixtures.
A potentially explosive atmosphere caused by dust requires classification into zones 20, 21 or 22.
A detailed set of technical regulations determines the design of electrical equipment in order to conform to the requirements of the respective zone.

Ex devices in the Rixen Messtechnik product range

In order to make it easier for you to decide on the suitability of our Ex instruments, we have had the relevant pressure gauges certified in accordance with the ATEX directives. In the EU, the ATEX directives form the basis for proof of the safety of individual Ex instruments.
Our differential pressure gauge RW65_EX_II is certified according to ATEX II 1 GD Ex ia IIC/IIIC T4 Ga Da. This marking contains all the results of the tests coded according to the individual regulations. The character combinations “1 GD” and “Ex ia” within the key indicate the suitability for all Ex zones.
The differential pressure gauge MU-Analog-65-EX can be used in Ex-area zone 2.

  • Ringbalance with built-in intrinsically safe 2-wire 4-20mA loop current transmitter. Approved according to ATEX II 1 GD Ex ia IIC/IIIC T4 Ga Da for all ex-zones. Housing steel/brass in RAL5015 or stainless steel. Supply via intrinsically safe power supply unit
  • Explosion-proof 3-colour LED signal lamp ATEX approved for use in EX I and EX II areas. (Colours can be combined as desired) Possible applications as a signal lamp
    • in areas endangered by gases and liquids (chemical industry, filling plants for flammable liquids, petrochemical industry)
    • in areas where there is a risk of explosion due to dust (plastic and metal processing plants, food industry, grain mills and wood processing industry)