CD Instrumentation Pvt. Ltd. Offers Pocket Size pH Meter. CD Instrumentation Pvt. Ltd. Supplies Secondary Standard Dosimeter, Clinical Dosimeter, Xrossline Lasers, Calibrator, pH meter, Pocket pH Meter, Conductivity Meter, Pocket Conductivity Meter, etc. The Pocket Size pH Meter is an electronic device that is easy to use. The Pocket Size pH Meter is used to measure the pH [acidity or alkalinity] of a liquid [though special probes are sometimes used to measure the pH of semi-solid substances]