Portable PH Meter

For field engineer that usually measure a pH of the liquid on the environment that they are founded, they usually use portable pH meter in order can easily to check the pH condition of the liquid flow.

The Model Personal pH/ORP Meter is a highly accurate, portable pH meter for
laboratory and field application. With its self-diagnostic function, the PH meter provides
precise measurement of pH and ORP (oxidation-reduction potential). Measurement
results can be stored and stored data can be checked on the meter display any time. The
PHmeter is of waterproof construction so that it can safely be used outdoors on a rainy day, and can also withstand being accidentally dropped into water.
Some Feature should be own by pH meter equipment:
  • Water resistant case
  • Simple calibration
  • Automatic calibration based on preprogrammed data of standard solutions or manual calibration can be done through simple key operations.
  • Calendar and clock function
  • Internal clock functions allow “one-touch checking” of measurement date and time.
  • Data storage function
  • Up to 300 measured pH values along with their respective solution temperatures, dates and times, can be stored and stored data can be checked on the display any time.
  • Auto power off function
  • The meter will turn off power automatically if not operated during a preset time period.
  • The auto power off time can be user configurable in the range of 1 to 120 minutes in increments of 1 minute. The auto power off function can be disabled, where the meter should be used with care to conserve the batteries.
  • Alarm clock function
  • The meter can issue an alarm signal at a specified time. Even when meter power is turned off, the internal clock can issue an alarm signal.
  • Self-diagnostic function
  • A relevant error message will appear based on the self-diagnostic function.
  • Large, clear LCD
  • A measured pH (mV) value, solution temperature, date and time are clearly viewed on the display.
  • Compact, lightweight, and handy
  • The meter fits comfortably your hand and also stands firm on the table.
For portable pH meter it should cover the following specification.
Measuring range: pH: 0 to 14 pH
ORP: -2000 to 2000 mV
Temperature: 0 to 100oC
Resolution: pH: 0.01 pH
ORP: 0.1 mV (-199.9 to 199.9 mV)
1 mV (-2000 to -200 mV and 200 to 2000 mV)
Temperature: 0.1oC
Repeatability (without sensor):
pH: ± 0.01 pH 61 digit
ORP: ± 1 mV 61 digit
Accuracy (Temperature): ± 0.7oC (0 to 70oC)
                                       ±1oC (above 70oC)
Temperature compensation (glass electrode emf — temperature characteristics):
Automatic compensation (or manual compensation*1)
Solution temperature: 0 to 80oC (or 0 to 100oC*1) (0 to 50oC when a KCl replenish free type sensor and its sensor cable are immersed in water)

Solution conductivity: 50 μS/cm or more
Ambient temperature: 0 to 50oC
Construction: Protection class IP67 (IEC 60529)
Power source: 2x AA batteries (LR6)
Auto power off function (time configurable: 1 to 120 minutes)
Battery life: Approximately 600 hours*2 of continuous use (battery type and operating condition dependent)
Dimensions: Approximately 150(H) x 61(W) x 42(D) mm (not including connector part)
Weight: Approximately 220 g (including batteries)
*1: When a needle type or test tube size pH sensor is used.
*2: When alkaline batteries are used.


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