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…
Certified Automation Professional (CAP) Exam Questions
The International Society of Automation (ISA) provides sample Certified Automation Professional (CAP) Exam Questions and answers for engineers who are planning to get certification from ISA. Certified Automation Professional Exam Questions…
Gas Filter Correlation (GFC) Spectroscopy
Using filter cells to eliminate wavelengths associated with interfering gases is called positive filtering in the field of spectroscopy. You may think of this as filtering out all the wavelengths…
Active and Passive Fire Protection
Active fire protection systems such as water sprinkler and spray systems are widely used in the process industries for protection of storage vessels, process plant, loading installations and warehouses. The…
How does a Redundant Controller comes in line when the Main Controller fails?
How does a Redundant Controller comes in line when the Main Controller fails in the distributed control system (DCS)? The Processor Card performs calculations and control computation. In case of…
NDIR Analyzer Filter Cells
If other species (Different Gas Components) of gas present in the sample do not absorb any of the light wavelengths absorbed by the one gas we’re interested in measuring, the…
