How Sliding Stem Valves Work ?
A sliding-stem valve body is one where the moving parts slide with a linear motion. Some examples of sliding-stem valve body designs are shown here: Sliding Stem Valves Most sliding-stem…
Different Flow Measurement Technologies
Every flow-measuring devices exploits a physical principle to measure the flow rate of fluid stream. Discuss Different Flow Measurement Technologies.
What is an Insertion Flow Meter? – Types, Principle, Advantages
A classic example of an insertion flow meter element is the Annubar, a form of averaging pitot tube. Learn the types and principles.
Change-of-Quantity Flow Measurement
Change-of-Quantity Flow Measurement uses load cells to precisely measure weight which is directly proportional to mass with constant gravity.
Mechanical Vibration Switch Principle
Mechanical Vibration Switches provide vibration protection for low- to medium-speed machinery. An inertia sensitive mechanism activates a snap-action switch with SPDT output contacts if the vibration exceeds an adjustable setpoint.…
Hydrogen Sulfide Gas (H2S)
Hydrogen Sulfide (H2S) is a highly toxic gas, with a pungent “rotten eggs” odor at low concentrations but no visible color. At higher concentrations, the gas acts as a nerve…
Non-contact Vibration Measurement
Types of Non - Contact Vibration Measurement Path Measurement Capacitance Eddy Current Hall Effect Optical Speed Measurement Laser-Doppler vibrometer Seismometer Acceleration measurement Path measurement Capacitive Principle The capacitive principle can…
Contact Vibration Measurement
Types of Contact Vibration Measurement Path Measurement Potentiometer Type LVDT Type Speed Measurement Electrodynamics Seismometer Acceleration measurement Piezoelectric sensor Piezo-resistive sensor Resistive sensor Inductive sensor Path Measurement Potentiometric Transmitter The…
Chemiluminescence
Recall that an exothermic chemical reaction is one that releases a net sum of energy, as opposed to an endothermic reaction which requires a greater input of energy than it…
Fluorescence
When a high-energy photon strikes an atom, it may eject one of the lower-level electrons from its shell, leaving a vacancy to be filled by one of the electrons already…
