Intrinsically Safe Temperature Sensors (ATEX)

Early in 2012, we have begun manufacturing explosion resistant thermocouples and resistance thermometers for business and industry sectors utilizing flammable substances in either gaseous form, as mists or dust particles. These are available in a wide variety of make and design.


Certified Production Facility

In 2011 the quality management system at both GÜNTHER GmbH production facilities was certified pursuant to ATEX (Atmosphères Explosibles) directive 94/9/EG, a requirement for the production of type-approved sensors.

To satisfy future requirements and technological variety, continuous development of our products, as well as their adaptation for individual application scenarios is a matter of course. As a result, our current product line was expanded to include a wide range of ATEX Sensors for gas-Ex- and dust-Ex-areas.

Application Areas for Our Intrinsically Safe Temperature Sensors

Application Areas for Our Intrinsically Safe Temperature Sensors

Application Areas for Our Intrinsically Safe Temperature Sensors

Function, Construction and Application

Our intrinsically safe sensors are implemented as resistance thermometers or thermocouples. They convert the temperature at the point of measurement into an electric variable (voltage, resistance) and, in combination with corresponding secondary devices, serve to measure, register and regulate temperatures in the region between - 200°C and approx. +1200°C.

Resistance thermometers in series R1 to R6, as well as thermocouple thermometers in series T1 to T6, are constructed so that they do not – and this includes provision for possible errors – provide a source of ignition.

GÜNTHER Ex-sensors find application in many industry sectors as intrinsically safe equipment for temperature measurement in liquid and gaseous environments. The sensors in series R1/T1 to R4/T4 consist of a protective fitting with varying process connectors, a connector head and exchangeable gauge slide. The sensors in series R5/T5 and R6/T6 consist of gauge slides with connector head or connection box with various process
connectors. They are implemented either with protective tubing or mineral-insulated wiring and cable connectors.

Depending on application and measurement requirements, our sensors may be fitted with a variety of process connectors. The devices may only be operated with the designated protective tubing, as all protective fittings (process contacting parts) are leakage tightness tested in our certified test laboratory.

These sensors with the Ex ignition protection type “i”, are certified for connection to intrinsically safe category “ia” circuits. When connecting to an intrinsically safe circuit, the operator is required to limit the incoming power to the point where the maximum electric surface heat corresponding to the temperature class, minus the protection ratio distance, is not exceeded.

Common platinum and nickel resistors are used for these resistancethermometers (R1-R6). These sensors are manufactured pursuant to DIN EN 60 751 and are available in all prevalent tolerance classes, as two-, three- or four-wire systems. Models with two measurement circuits are also possible.

The thermocouple assemblies (T1-T6) are optionally fitted with thermocouples T, J, K, E and N pursuant to DIN EN 60584-1, in tolerance class 1 or 2, as single or double measurement circuits.

They fulfill the requirements for explosion group II of categories 1/2G and/or 2G, several types also meet the requirements for categories 1/2D and/or 2D. As a result, they are suited for application in explosion hazard areas zone 1 for gas, zone 21 for dust.

For more information on each intrinsically safe product series please read our PDF offered in the top of right column.