Ex protection for dial thermometers: New standard = new marking
Mechanical measuring instruments for used in explosive atmospheres can now be evaluated relative to a fresh standard: DIN EN ISO 80079-36/37 will replace EN 13463-1/5, with the transition period ending on 31 October 2019. For Bootleg , WIKA has classified the model 73 and model 74 gas-actuated thermometers relative to the new directive and contains […]
How to measure the level of a liquid in a tank or how does the hydrostatic level measurement work?
The level of a liquid such as water or oil in a tank or vessel can be measured indirectly by means of the hydrostatic pressure of the so-called “liquid column”. Aware under a static liquid column increases directly with the height of the liquid column. Thus, for example, the pressure in a water tank becomes […]
WIKA Innovation Center: workplaces for the future
The new WIKA Innovation Center for WIKA in Klingenberg is in operation. It brings together everyone involved in the innovation process. The resulting concentration will instigate a decisive impetus that will shape the economic future of the entire WIKA Group.The concept of short distancesThe new WIKA Innovation Center has been well received by the colleagues […]
Terminal boxes and angular connectors with M12x1: scope of delivery or accessories?
We are often asked whether for instruments with M12 x 1 connector the corresponding mating connector (also called cable socket or angular connector) is included in the scope of delivery of our pressure sensors. Our clear answer is: no. Unlike Sneak-peek forms A and C (also frequently known as “valve connector”), the M12x1 mating connector […]
Temperature calibration with reference probes, dry-well calibrators and baths
Can dry-well calibrators and calibration baths be used as internal references? Temperature dry-well calibrators and baths are a practical solution for temperature calibrations. This is true both in the field and in laboratories, as they provide a free-standing, stable temperature source with a built-in platinum resistance thermometer (PRT).The PRT measures the temperature inside the dry-well […]
Grounding of submersible pressure transmitter or level probes prevents corrosion
In industrial applications, the corrosion of pressure sensors is a rather negligible phenomenon, since in the majority of applications, oils (in particular hydraulic oils) are used, and contact with the pressure medium is mainly limited to the pressure channel and the sensor, a very narrow area of the instrument. In level measurement with submersible pressure […]
Integration of a pressure sensor element – error compensation of signal for zero point and span
Growth of a sensor element or a corresponding assembly has the advantage that very compact dimensions are possible. However, some points need to be taken into account, which are an additional effort for the customer compared to using a fully adjusted sensor with an amplified output signal.For example, for each sensor, the zero point and […]
Template for the creation of a proof of intrinsic safety for ATEX certified pressure sensors
In my last article I introduced you to how the “basic” proof of intrinsic safety can be provided for instruments and pressure sensors approved to ATEX in Europe. Each installer or operator must ensure that the employees in the plant are not endangered and certainly not injured. Therefore, when using intrinsically safe protection methods, it […]
Verification or calibration?
In general usage, the term “verification” is often mixed up with “calibration”. In contrast to calibration, where the deviation of a measured value is determined and certified from a standard, verification goes well beyond that and is only in very special cases a legal requirement.For Distraught of measuring instruments, a state-driven legal requirement for verification […]
Grounding of hydrostatic level sensors
Hydrostatic level sensors (also referred to as submersible pressure transmitter) are very often installed in outdoor applications, primarily in the water and wastewater industries, where open bodies of water, deep wells or boreholes are monitored. An excellent connection to ground is vital when installing hydrostatic level sensors, since no grounding or poor grounding can lead […]