Waterproof Portable pH ORP Temp Meters

AD131 is a heavy-duty portable waterproof meters for pH and temperature measurements, designed to provide laboratory results and accuracy even under harsh industrial conditions.


  • 7 memorized buffers for pH calibration (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45)
  • Messages on the LCD to make the calibration easy and accurate
  • pH readings with manual or automatic temperature compensation
  • Calibration time-out alarm
  • Log-on-demand
  • HOLD feature to freeze stable reading on the LCD
  • GLP feature to view last calibration data for pH and relative mV

Supplied complete with

AD1230B pH electrode with epoxy body with tip protector, AD7662 stainless steel temperature probe, calibration solution in sachets (pH7 and pH4, 20 ml each), 1.5V AA alkaline battery (4 pcs), user manual.

Manual PDF

Manual AD131-132

Video - Adwa AD131 pH Measurement

Video – Adwa AD131 pH measurement (similar to AD132)

Video - Adwa AD131 ORP Measurement

Video – Adwa AD131 ORP measurement (similar to AD132)