PH-220 Series

Portable pH/ORP Meter


* 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.

* Help message as a operational guide that helps you quickly using the meter(for PH-220).

* Manual temperature calibration improves the measurement accuracy of meter(for PH-320).

* Selectable temperature unit (°C or°F ) meets different application requirements(for PH-320).


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.


Ion Concentration Mode(For PH-320):

* 2 to 5 points calibration providing the 8 concentration points can be selected.

* Automatically recognize ion electrodes, does not need to specify the type of ion.

* Direct ion concentration readout simplifies the elaborate measurement process.

* Selectable multiple concentration units include the ppm, mg/L and mol/L.

Technical Parameters:

Model PH-220 PH-221 PH-320
pH Range -2.00~16.00pH -2.000~20.000pH -2.000~20.000pH
pH Accuracy ±0.01pH ±0.002pH ±0.002pH
Resolution 0.01pH 0.1, 0.01, 0.001pH, Selectable 0.1, 0.01, 0.001pH, Selectable
Calibration Points 2 points 1~5 points


1~5 points


Calibration Solutions USA (pH4.01/7.00/10.01) 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 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 0~100°C, 32~212°F, Manual or Automatic 0~100°C, 32~212°F, Manual or Automatic
mV Range -1999~1999mV -1999.9~1999.9mV -1999.9~1999.9mV
mV Accuracy ±1mV ±0.2mV ±0.2mV
Resolution 1mV 0.1, 1mV, Selectable 0.1, 1mV, Selectable
Calibration Points / 1 point (Only for Relative mV mode) 1 point (Only for Relative mV mode)
Ion Concentration Range / / 0.001~19999ppm, mg/L, mol/L (Refer to the range of ISE)
Ion Concentration Accuracy / / ±0.5% F.S (Monovalent),±1% F.S (Divalent)
Calibration Points / / 2~5 points (0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000ppm, mg/L, mol/L)
Temperature Range 0~100°C, 32~212°F 0~105°C, 32~221°F /
Temperature Accuracy ±1°C ±0.5°C,±0.9°F /
Resolution 0.1°C / /
Hold Function Manual / /
Memory Stores up to 50 data sets Stores up to 500 data sets Stores up to 500 data sets
Output / USB Communication Interface USB Communication Interface
Connector BNC ——–
Power Requirements 1×9V/800mA battery 3×1.5V “AA” batteries or DC5V power adapter 3×1.5V “AA” batteries or DC5V power adapter
Dimensions(W*D*H) 185*88*32mm 170*85*30mm
Package Size(W*D*H) 475*155*350mm
Net Weight 300g
Gross weight 2kg




SKU: PH-220 Category: Tag: