In Europe plants or machines used in hazardous areas must comply with the ATEX directive 94/9/EC. Therefore, the pressure sensors or other measuring instruments approved according to ATEX must be used only in conjunction with ATEX approved isolated barriers if they use …
All posts by Stefan Heusel
Pressure sensors, transmitters and safety: SIL, PL, DIN EN ISO 13849 and IEC 61508 – Commonly used terms and abbreviations
| Stefan Heusel | Know-howWhen using pressure sensors and pressure transmitters, our customers often ask for explanations of frequently used terms and abbreviations in connection with "SIL applications". SIL – which means Safety Integrity Level, and PL, which means Performance Level, are …
Ex pressure sensors and transmitters for ATEX Zone 0, Zone 1 or Zone 2 – markings of pressure instruments for use in a hazardous area
| Stefan Heusel | Know-howThe field of application or the suitability of a pressure sensor for a hazardous area is designated by the marking on the device. As a matter of principle, intrinsically safe pressure sensors marked Ex ia can be used in zone 0 (the "most dangerous" area), whereby a …
Ex 101 Hazardous Location Basics Part I – ATEX and CSA/FM hazardous area classification
| Stefan Heusel | PressurePressure sensors and other automation equipment must comply to local explosion protection regulations. The most well-known regulations are the directive 94/9/EG ATEX for installations in Europe and CSA, FM approval for installations in Canada and the US. If one’s …
Fields of application for pressure sensors 3 – Absolute pressure sensors: why is it necessary to use absolute pressure sensors or pressure transmitters
| Stefan Heusel | PressureElectronic pressure sensors usually measure the change in pressure through the deformation of a diaphragm. If this diaphragm is exposed to the process pressure on one side and "vented" on the other side (and thus exposed to the ambient pressure), the deformation is …