Pressure switches (for example, a “normally open contact”), are often used for the monitoring and control of safety functions in order to signal any over or underpressure, and thus to prevent any damage to the machinery or the system. Switches with the “normally …
Know-how
What is the difference between the switching functions “hysteresis” and “window” in pressure switches?
| Enrico Bossart | Know-howElectronic and mechanical switches are used for monitoring critical limit values and therefore usually fulfil a safety function. To meet this safety function, switches offer two alternative switching functions, the “hysteresis” and the “window” functions. In …
Maximum pressure for pressure connection G 1/8 and 1/8 NPT
| Michèle Beyer | Know-howWhy are the threads G 1/8 and 1/8 NPT offered for pressures only to a nominal pressure range of 400 bar? Where does this limit come from? Basically, the explanation is very simple: From a certain pressure limit, the thread flanks are no longer "strong" enough to …
Template for the creation of a proof of intrinsic safety for ATEX certified pressure sensors
| Stefan Heusel | Know-howIn 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 …
Shock resistance of pressure sensors
| Matthias Stratmann | Know-howIn many pressure sensor applications, short-duration, high, impact loading occurs - this is referred to as shock. Shock resistance defines up to what level of acceleration the instrument can withstand the shock loading without being damaged in any way. The loading …