Almost all of our force sensors are certified for explosion protection and are supplied as a complete measuring chain, consisting of a force sensor, J-Box, safety barriers and a measuring amplifier. The J-Box contains the resistances required for zero point and sensitivity adjustment and is permanently assigned to the force sensor by the common serial number. For deliveries that contain more than one measuring chain, the individual components must not be interchanged.
The components of the measuring chain are identified by an "F" in the order code:
For example RKS01D-50k-TF
|II||Equipment Group II (not underground - mining)|
|2||Category 2 (high level of security)|
|Gas - Zones 1 and 2|
Dust - Zones 21 and Zone 22
|Ex ia||Intrinsically Safe Equipment|
|IIC||Explosion Group Gas (Devices from group IIC are also certified for IIA and IIB|
|IIIC||Explosion Group Dust (Devices from group IIIC are also certified for IIIA and IIIB|
|T6 - T1||Temperature Class|
|T135°C||Maximum permissible surface temperature of the device|
|Gb / Db||Equipment Protection Level (EPL)|
HAEHNE has had its product range certified with a type examination and can therefore offer almost all force sensors with ATEX approval. The strain gauge sensors comply with Directive 2014/34/EU, the regulation for the intended use of equipment in potentially explosive atmospheres.
Certificates issued under the old ATEX directive 94/9/EC (until April 20, 2006) continue to apply unabated and are updated and expanded by supplements.
Adjustment box for operating force measuring sensors without internal adjustment resistors. It is used to adjust the sensors in the - increased temperature range - hazardous areaExplosion protection device group II (2) G