Level Measurement

Level Measurement sabse purane measurements me se ek hai. Industrial field me level measurement apne aapme hi bahut importance rakhte hain.  Liquids ka level affect kar sakta hai pressure aur rate of flow ko inlet aur outlet section of vessel or tank. 

Methods of Liquid Measurement

1)  Direct Method

2) Indirect Method

Direct Methods:- Ye level measurement ki sabse simplest form hoti hain. Following are Direct Methods for measuring level:-

i)                 Hook Type Level Indicator

ii)              Sight Glass

iii)    Float Type

Hook Type Level Indicator

Jab level kisi open tank me measure karna ho kisi scale (inside scale or outside scale) ke zarie to ye bahut mushkil hota accurate reading li ja sake kyuki isme parallax error aa jati hai islie aisy jagah hook type level indicator ka istemal kiya jata hai. Isme corrosion resisting alloy se bana hua wire istemal kiya jata hai jise U shape diya jata hai. Iske ek sire ko 60° taper kar diya jata  hai aur doosre lambe sire par ek vernier scale mount ki hui hoti hai jo ki main scale par slide karta hai aur usi ke zarie level measure kiya jata hai.

Sight Glass Method

Isko Gauge Glass bhi kaha jata hai. Is method ko continuous level indication ke lie istemal kiya jata hai. Isme ek glass tube mount kar di jati hai transparent tank ke paas, is glass tube par hi scale mention ki hui hoti hai jiski madad se level ko measure kar liya jata hai.

Float Gauge

Isme ek float gauge ka istemal kiya jata hai ye float tank ke andar liquid ke surface par rahta hai   `jo liquid ke level ke according upar neeche hota hai aur isse chain hoti hai jo pulley se hote hue scale ek needle se connect hoti hai jo float ke according upar neeche hoti move karti hai aur isse judi scale se measurement kar liya jata hai. Is chain ke doosre sire par kuch weights latke hote hain.

Indirect Level Measurement


1) Hydrostatic Pressure Type

        2)  Electrical Methods

Hydrostatic Level Measurement

Jab kisi tank me liquid bhara hota hai to wo tank ki walls par kuch force exert karta hai ye force liquids ka rest me rehta hai aur ise hi hydrostatic pressure karte hain.aur ye pressure proportional hota hai tank me present liquid ki height ke. Following are the types of hydrostatic pressure measurement:-

i)                 Pressure Gauge Method:- Ye ek simplest way hai kisi open tank me level measure karne ke lie. Isme ek pressure gauge connect hoti tank ke bottom me aur is place ko reference level kehte hain. Aur static pressure gauge ki madad se measure kiya jata hai. Tank me jitna bhi liquid up ya down hoga usi ke according pressure gauge se level ka measurement kar liya jata hai.

ii)            Air Bellows:– Bellow element ka bana hota hai jo ki tubing ki madad se pressure indicator se connected hota hai. Isme air ko seal kar diya jata hai bellows ke upar aur tubing ke andar. Jab tank khali hota hai tab sealed air uncompressed rehti hoti aur zero indicate karti hai. Jaise hi tank me liquid ana start hota hai tank me sealed air bellows ko compress karti hai aur upar nikalne ki koshish karti aur yahi compressure indicator ko transmit kar diya jata hai aur indicator reading show karne lagta hai.

iii)           Air Purge System:– Air purge system sabse zyada popular hai hydrostatic pressure type me liquids ke level ke measurement ke lie jo ki sabhi liquids ke lie suitable hai. Isko Bubbler Tube  bhi kehte hain. Jab tank khali hota hai ya bubbler tube ke neeche hota hai to gauge  par pressure zero show hota hai jaise jaise tank me liquid ka level increase hota hai wese wese hi bubbler tube me back pressure bhi increase hota hai aur isi bubbler tube se connected gauge me ye pressure indicate hota hai jiski madad se ham level measure kar lete hain.

About Mohd Mustaqeem Siddiqui

You can contact me for any ITI related information and for any query on ITI Electronic or Instrument Mechanic. siddiquemustaqeem@gmail.com

View all posts by Mohd Mustaqeem Siddiqui →

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