SANSEL make online pH indicator Model pH 641 is a precis, rugged
and weather proof instrument carefully designed for the most accurate
measurement of pH in all industries. These instruments are completely IC version
using “MOSFET” input “OP -AMP” and CMOS ICs.
This instrument is a panel mountable with a compact standard size of 48 x 96 x
65mm with front end potmeter type easy adjustable 4pH & 7pH buffer calibration
option. This instrument operates from 90V to 270V AC / DC ,50Hz.
