IP Ratings and Equivalent NEMA Ratings
IP Ratings (Ingress Protection) and Equivalent NEMA Ratings Explained IP Ratings An IP rating contains two numbers (i.e. IP65) in most instances which relate to the level of protection provided…
ATEX Ratings, Intrinsic Safety, Hazardous Areas and Explosive Atmospheres
Please note that this page provides helpful information only, detailed reference should be taken from an appropriate accredited agency or organisation. Protection Concepts Zone Hazard Protection Concepts 0 In which…
Why 4-20 mA Standard is so popular ?
4-20 mA Standard 4-20mA has an inherent ‘live zero’. Zero engineering units is 4.0mA, not 0.0mA. 0.0mA indicates an open circuit, a failure or a fault mode like cut wires…
Pressure Transmitters Installation Tips
There are a number of points to consider in a pressure measurement application. All require some thought in both the planning and execution. Location of Process Connections Process connections should…
Helix and Spiral Tubes – Pressure Sensor
Spiral-Type Bourdon Tube – One limitation of the C-type bourdon tube is the relatively small amount of tip movement. A spiral-type bourdon tube provides more tip movement. The spiral-type tube…
C-Bourdon Tube Pressure Gauge Theory
The Bourdon tube works on a simple principle that a bent tube will change its shape when exposed to variations of internal and external pressure. As pressure is applied internally,…
Top 10 Facts about HART Technology
What You Thought You Knew But Didn’t 1: HART is Useful Only for Device Set-up, Commissioning, and Periodic Maintenance FACT: HART can offer many more valuable benefits. It can be…
Temperature Sensors Interview Questions
Complete set of Questions and Answers on Thermocouple, Resistance thermometers, Thermowell and more Temperature Sensors Interview Questions. Temperature Sensors Interview Questions Resistance thermometers What is RTD class A and class…
Linear to Square Root Extraction
In Linear to Square Root Conversion, Relationship is non-linear there is a greater change in flow at low pressures compared to higher ones.
Level Calculation with Remote Seals
Diaphragm seals for tanks under Vacuum The transmitter must be mounted level with or below the lowest tap to ensure positive pressure at the transmitter. Dist. Between Taps = H DP = Hside - Lside…
