Aei-405

DEPARTMENT OF TECHNICAL EDUCATION ANDHRA PRADESH Name

: M. Vani

Designation

: Lecturer

Branch

: AEI

Institution

: Dr. B. R. Ambedkar GMRP,KNR

Year/sem

: IV-SEM

Subject

: Process Instrumentation-II

Subject code

: AEI-405

Topic

: Miscellaneous measurement

Sub topic

: Leak Detector

Duration

: 50 minutes

Teaching aids

: PPT, Visuals AEI 405.87

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Recap In the last class we have studied about  Flame sensors.

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Objectives Upon the completion of this topic you would be able to know about  Leak detectors

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Leak detectors  Leak detector is a device which detects the leakage.  There are many devices for detection of leakages of gas, water etc..  This detector, detects and gives information about the leakage  These detectors are used to detect leakage through valves and stem, tank, gas leakage . AEI 405.87

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Leak detectors …  Pressure measurement is most widely used in industry. The fall of pointer on a pressure gauge indicates the leakage.  Bubble emission or foam indicates the leakage.  Aerosols, paints and paper that change color due to chemical reaction whenever the leakage exists. AEI 405.87

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Leak detectors …  The color change at the spot means their exists leakage.  Dyes are also used to detect leak in sewage streams.  Ultrasonic leak detectors are used to detect leak of ultrasonic waves.

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Other leak detectors  Thermal conductivity leak detectors  Under ground leakage detection  Thermography (detection of temperature)

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Uses of leak detectors  Leakage through valves and steam traps.  Tightness of above ground tanks and pipes.  Under ground tank leakage  Chemical leakage out in the atmosphere of an industry or laboratory

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Helium leak detector

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Water leak detector

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Summary In this class we have discussed about  Leak detectors  Water leak detector

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Quiz 1. Leak detectors detect the ______ a) Flame b) Leakage c) Smoke d) None

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Quiz 1. Thermography is used for detection of a) Wind leakage b) Water leakage c) Temperature leakage d) None

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Frequently asked questions 1.

Write about leak detector

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Thank you

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