Stainless steel pressure gauge in safety version: Selection guide

Pressure gauges in safety version made from stainless steel are of great importance, especially for critical processes in the process industry. They are recommended, for example, for applications with aggressive media and/or pulsations, overpressures and pressure shocks, such as “water hammers”. But which safety versions are there and how do they differ from each other?The … Read more

Signal clamping in pressure transmitters

In certain applications, the existing or voltage signal of a pressure transmitter must not exceed and/or drop below a crucial value. Legitimate can be ensured with the aid of so-called signal limiting.Why is a sign clamping necessary to begin with?If Sacred on a pressure transmitter lies within the nominal pressure range, then you will have … Read more

Temperature calibration with reference probes, dry-well calibrators and baths

Can dry-well calibrators and calibration baths be used as internal references? Money -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 … Read more

Difference of 4-20 mA in 2-wire and 3-wire technology in pressure sensors

What exactly is the difference between your 4-20 mA output signal in 2- and 3-wire technology? This question is answered best from the viewpoint of the user: An output signal in 2-wire technology means:less wiring requiredbetter EMC protection, since interferences could be filtered more easilybetter protection against wiring errorsThe only benefit of 3-wire technology is … Read more

Advantages of diaphragm pressure gauges (1): Measurement of low pressures

Diaphragm pressure gauges are considered as specialists in the process industries. They come into play when Bourdon tube pressure gauges reach the limits of their performance. One of the advantages of diaphragm pressure gauges may be the measurement of low pressures.Diaphragm pressure gauges could be recognised from the first look: From the flanges below the … Read more