Three specific types of errors have a negative impact on pressure sensor accuracy. This easy-to-understand video from WIKA explains the difference between zero-point errors, span errors, and non-linearity. Inaccuracies in pressure instrumentation occur when the …
Know-how
Diaphragm Seal Overview: Basic Principle and Applications
Chi-Che Ma | Know-how, PressureA diaphragm seal makes measuring pressure safer and more reliable, even in extreme working conditions, and is ideal for protecting pressure instrumentation and process transmitters. Discover the basic principle of diaphragm seals and when to use them. Pressure …
The Problems with Verifying Thermocouple Accuracy During Reactor Startups
Robert Torgerson | Know-howRefinery operators who work with fixed bed catalysts place a high value on temperature accuracy, but they also don’t want to waste time by taking unnecessary temperature readings. Thus, to better understand any radial temperature differences that may exist during …
What to Know about Aging and Drift in Type K Thermocouples
Robert Torgerson | Know-how, TemperatureWith repeated exposure to high temperatures, a Type K thermocouple becomes less accurate. Aging is a phenomenon that results in higher-than-accurate temperature readings, while drift results in lower-than-accurate readings. While all Type K thermocouples experience …
Pressure Transmitter Accuracy and Pressure Transmitter Non-Linearity: Not the Same Thing
Robert Lukat | Know-howSometimes, references to pressure transmitter accuracy are actually about the non-linearity of the pressure transmitter’s response. Although accuracy and non-linearity are related, the two terms are not the same and shouldn’t be used interchangeably. The …





