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Instrumentation Books

What is ON/OFF Valve ?

S Bharadwaj Reddy
An ON/OFF Valve is the fluid equivalent of an electrical switch, a device that either allows unimpeded flow or acts to prevent flow altogether. These valves are often used for...

Basics of AC Induction Motors

S Bharadwaj Reddy
The basic principle of an AC induction motor is that one or more out-of-phase AC (sinusoidal) currents energize sets of electromagnet coils (called stator coils or windings) arranged around the...

Basics of Pressure switches

S Bharadwaj Reddy
A pressure switch is one detecting the presence of fluid pressure. Pressure switches often use diaphragms or bellows as the pressure-sensing element, the motion of which actuates one or more...

OTDR Testing

S Bharadwaj Reddy
An Optical Time-Domain Reflectometer or OTDR is a sophisticated test instrument used to probe the characteristics of long optical fibers. They work by injecting a very brief pulse of light...

Multi-mode and Single-mode Optical Fibers

S Bharadwaj Reddy
In any sort of waveguide – optical, electrical, or even acoustical (sound) – the signal energy may be able to propagate down the waveguide in different orientations. This is true...

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