Portable pH/ORP Meter PH-221

Portable pH/ORP Meter PH-221

Professional portable pH meter with relative and absolute millivolts measurement modes. The meter supports 5 points calibration, system menu contains 9 optional parameters. Accuracy: 0.002pH.

  • pH Mode:

    1. Professional portable pH meter is equipped with a large backlit LCD display.
    2. 1 to 5 points push-button calibration with auto-buffer recognition.
    3. Selectable pH buffer standard (USA/NIST/DIN) or using the custom calibration solutions.
    4. Automatic electrode slope display helps user decide whether to replace sensor.
    5. Automatic Temperature Compensation provides accurate reading over the entire pH range.
    6. Calibration Due Reminder prompts you to calibrate the meter regularly.


    ORP Mode:

    1. Single point offset calibration allows adjusting the displayed value to a known standard.
    2. Relative and absolute millivolts measurement modes provide accurate ORP readings.


    Other Features:

    1. Stability indicator automatically shows current measurement status.
    2. Auto-Hold function freezes stable measured value for easy viewing and recording.
    3. Manual temperature calibration improves the measurement accuracy of meter.
    4. Selectable temperature unit (°C or °F) meets different application requirements.
    5. Automatic electrode diagnosis shows zero point offset and slope of the pH electrode.
  • Model PH-221
    pH 　
    Range -2.000~20.000pH
    Accuracy ±0.002pH
    Resolution 0.1, 0.01, 0.001pH, Selectable
    Calibration Points 1 to 5 points
    Calibration Solutions USA, NIST, DIN or User-defined
    Temperature Compensation 0~100°C, 32~212°F
    Compensation Mode Manual or Automatic
    mV 　
    Range -1999.9~1999.9mV
    Accuracy ±0.2mV
    Resolution 0.1, 1mV, Selectable
    Calibration Points 1 point (Only for Relative mV mode)
    Calibration Range ±200mV
    Temperature 　
    Range 0~105°C, 32~221°F
    Accuracy ±0.5°C, ±0.9°F
    Resolution 0.1°C
    Calibration Range Measured value ±10°C
    Temperature Units °C or °F
    Others 　
    Hold Function Manual or Automatic
    Stability Conditions Low or High
    Calibration Due 0 to 31 days
    Power Off Manual or Automatic (10, 20, 30 minutes)
    Reset Function Yes
    Memory Stores up to 500 data sets
    Output USB Communication Interface
    Connector BNC
    Power Requirements 3×1.5V "AA" Batteries
    Battery Life Approximately 150 hours (Turn off the backlit)
    Dimensions 170(L)×85(W)×30(H)mm
    Weight 300g