Personal Handheld Meter PH71/PH72

Compact, Easy-to-Use, and Dip-proof, the PH71/PH72 series is designed specifically to meet the needs of both the field and the laboratory. This portable pH and/or ORP meter includes advanced features such as self-diagnostics, data memory, Automatic or Manual Temperature Compensation, and several calibration options.

Combined with a wide variety of pH and ORP electrodes, the PH71/PH72 series offers the flexibility to meet the requirements of nearly any pH and ORP applications.

About OpreX

OpreX is the comprehensive brand for Yokogawa’s industrial automation (IA) and control business and stands for excellence in the related technology and solutions. It consists of categories and families under each category. This product belongs to the OpreX Analyzers family that is aligned under the OpreX Measurement category.


  • Waterproof (IP67), sealed case and connector cover to keep out moisture
  • "One-Touch" Automatic and Manual Calibration
  • Auto or Manual Temperature Compensation
  • Large, easy-to-read LCD display
  • Self-Diagnostics warn of fault conditions
  • Auto power off extends battery life
  • 300 Points of Data Memory (stores pH/ORP value, temperature, date, and time)
  • Audio Alarm Function
  • ORP Measurement with appropriate electrode
Measuring range pH: 0 to 14 pH
ORP: -2000 to 2000 mV
Temperature: 0 to 80℃
Resolution pH: 0.01 pH
ORP: 1 mV (0.1 mV for ±199.9 mV)
Temperature: 0.1℃
Repeatability (w/o sensor) ±0.01 pH ±1 digit
±1 mV ±1 digit
Display Digital display by liquid crystal
Temperature compensation Automatic, manual
Calibration Automatic (1 or 2 point), manual
Ambient temperature 0 to 50℃
Construction IP67 (JIS C0920)
Weight Approx. 220 g (without sensor)
Power source 2 AA size dry cell batteries


Descripción General:

Current trend for increasing mercury awareness throughout the public sector has caused the government to take action. Recently, the Environmental Protection Agency (EPA) has focused their efforts on controlling mercury levels produced in various coal fired power plants. Based on information from several case studies, the EPA developed the Mercury and Air Toxics Standards to cut back mercury emissions. The most popular technology utilized by coal plants to meet the new standards is a scrubber which cleans the off gas from the combustion process. ORP sensors can further monitor the effluent from these scrubbers to ensure optimal mercury emission levels are achieved. By closely monitoring the mercury concentrations in the effluent, plant managers will be able to easily confirm their plants are meeting the EPA's standards.



¿En busca de información adicional sobre Yokogawa Iberia, tecnología y soluciones?