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Portable pH/ORP Meter (PH-221)

In stock

Portable pH/ORP Meter (PH-221)


2-4 Weeks - Lead Time


Portable pH/ORP Meter ( Model pH221)




Economy portable pH meter, 2 points calibration, automatic temperature compensation, system menu contains 2 optional parameters. The meter is used for measuring the pH and millivolt of samples. Accuracy: 0.01pH.



* Stability indicator automatically shows current measurement status.

* Auto-Hold function freezes stable reading for easy viewing and recording.

* Automatic electrode diagnosis shows offset and electrode slope.

* Reset feature automatically resumes parameters back to factory default options.


pH Mode (For PH-221/320):

* 1 to 5 points push-button calibration with auto-buffer recognition.

* Automatic electrode slope display helps user decide whether to replace sensor.

* Automatic Temperature Compensation provides accurate measured values.

* Calibration Due Reminder prompts you to calibrate the meter regularly.

ORP Mode(For PH-221/320):

* 1 point offset calibration allows adjusting the displayed value to a known standard.

* Relative and absolute mV measurement modes provide accurate ORP readings.


pH Range -2.000~20.000pH
pH Accuracy ±0.002pH
Resolution 0.1, 0.01, 0.001pH, Selectable
Calibration Points 1~5 points




Calibration Solutions USA (pH1.68/4.01/7.00/10.01/12.45), NIST (pH1.68/4.01/6.86/9.18/12.45), DIN (pH1.09/4.65/6.79/9.23/12.75) or User-defined
Temperature Compensation 0~100°C, 32~212°F, Manual or Automatic
mV Range -1999.9~1999.9mV
mV Accuracy ±0.2mV
Resolution 0.1, 1mV, Selectable
Calibration Points 1 point (Only for Relative mV mode)
Ion Concentration Range /
Ion Concentration Accuracy /
Calibration Points


Temperature Range 0~105°C, 32~221°F
Temperature Accuracy ±0.5°C,±0.9°F
Resolution /
Hold Function /
Memory Stores up to 500 data sets
Output USB Communication Interface
Connector BNC
Power Requirements 3×1.5V “AA” batteries or DC5V power adapter
Dimensions(W*D*H) 170*85*30mm
Package Size(W*D*H) 475*155*350mm
Net Weight 300g
Gross weight 2kg


Additional information

Dimensions 9 × 17 × 5 cm


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