Within the European Community, intrinsically safe pressure sensors may only be used in hazardous areas if they are installed in conjunction with an Ex barrier. The combination of pressure sensor and Ex barrier must meet the “ Proof of intrinsic safety ” in …
Know-how
Defeat pressure spikes – prevent damage to pressure measuring instruments
Stefan Heusel | Know-howParticularly when measuring the pressure of fluids in piping systems, pressure sensors are consistently destroyed by overpressure. The analysis of the damaged equipment often then shows that a significantly higher pressure than the prevailing system pressure in the …
Conversion of pressure units
Sabine Mai | Know-howThe common units for the measurement parameter pressure are bar, psi, kg/cm², inHg and MPa, for example. In most cases, one unit has become established in a particular country or region. As a result, it often happens that one must convert a given pressure value into …
Dust explosion, the underestimated danger – Pressure sensors must meet requirements for the maximum permissible surface temperature
Stefan Heusel | Know-howWith the key phrase “potentially explosive atmospheres”, many users immediately think about areas that contain flammable gases and now know that only ATEX-approved pressure sensors may be used in plant and machinery in these areas. Frequently, however, they …
What is meant by diagnostic coverage?
Stefan Heusel | Know-howAn important parameter in the use of pressure sensors in safety devices is the so-called “Diagnostic Coverage” (DC). However, since single-channel, in particular, but also two-channel safety circuits often malfunction or may be defective, a known diagnostic …