Metering Pumps
A very common method for directly controlling low flow rates of fluids is to use a device known as a metering pump. A “metering pump” is a pump mechanism, motor,…
Two out of Three Logic Analogy
Two out of Three Logic with Boolean Algebra Analysis : In designing digital circuits, the designer often begins with a truth table describing what the circuit should do. The design…
Safety Questions and Answers
HSE and Safety Interview Questions and Answers What is a BUMP TEST ? A bump test is a functional test of a gas monitor/detector. Sensors and alarm indicators are tested,…
Displacer Interface Level Measurement
Displacer level instruments may be used to measure liquid-liquid interfaces just the same as hydrostatic pressure instruments. One important requirement is that the displacer always be fully submerged (“flooded”). If…
How Buoyant Force instruments Works ?
Displacer level instruments exploit Archimedes’ Principle to detect liquid level by continuously measuring the weight of an object (called the displacer ) immersed in the process liquid. As liquid level…
Fixed Gas Detectors vs. Portable Gas Detectors
Fixed Gas Detection Systems vs. Portable Gas Monitors Fixed gas detection systems and portable gas monitors are both essential to protecting workers and equipment and meeting OSHA/EPA requirements. Both products…
Hydrostatic Interface Level Measurement
Hydrostatic pressure sensors may be used to detect the level of a liquid-liquid interface, if and only if the total height of liquid never drops down into the sensing range…
Differential Pressure Transmitters Compensated Leg Systems
Differential Pressure Transmitters Compensated Leg Systems The simple and direct relationship between liquid height in a vessel and pressure at the bottom of that vessel is ruined if another source…
Basics of DP Transmitter Suppression and Elevation
Transmitter Suppression and Elevation A very common scenario for liquid level measurement is where the pressure-sensing instrument is not located/installed at the same level as the 0% measurement point. The…
Float Level Measurement
Float Level Measurement Perhaps the simplest form of solid or liquid level measurement is with a float : a device that rides on the surface of the fluid or solid…
