How to Revive a Dried Out ph meter Electrode

A ph meter is an essential tool for measuring the acidity or alkalinity of a solution. It consists of a probe with a glass electrode that detects the hydrogen ion concentration in the solution. However, if the electrode dries out, it can affect the accuracy of the pH readings. In this article, we will discuss how to revive a dried out ph meter electrode to ensure accurate measurements.

When a ph meter electrode dries out, it can lead to a buildup of contaminants on the glass membrane, affecting its sensitivity and response time. This can result in inaccurate pH readings and potentially damage the electrode. To revive a dried out ph meter electrode, the first step is to rehydrate the glass membrane.

FL-9900 High Precision Type Runner Flow Controller
Measuring range Frequency 0~2K Hz
Velocity of flow 0.5~5 m/s
Instantaneous flow 0~2000 m³/h
Cumulative flow 0~9999 9999.999 m³
Applicable pipe diameter range DN15~DN100;DN125~DN300
Resolution 0.01 m³/h
Refresh rate 1s
Accuracy class Level 2.0
Repeatability ±0.5%
Sensor input Radius:0~2K Hz
Supply voltage:DC 24V(instrument internal supply)
The electronic unit automatically temperature compensates for errors +0.5%FS;
4-20mA Technical characteristics Meter/transmitter dual mode (photoelectric isolation)
Loop resistance 500Q(max),DC24V;
Transmission accuracy ±0.01mA
Control port Contact mode Passive relay control output
Load capacity Load current 5A (max)
Function selection Instantaneous flow upper/lower alarm
Mains supply Working voltage: DC24V 4V Power consumption :<; 3.OW
Cable length Factory configuration: 5m, can be agreed: (1~500) m
Environmental requirement Temperature: 0~50℃; Relative humidity: ≤85%RH
Storage environment Temperature: (-20~60) ℃; Humidity: 85%RH
Overall dimension 96×96×72mm(height × width × depth)
Opening size 92×92mm
Installation mode Disc mounted, fast fixed
Sensor Body material Body: Engineering plastic PP; Bearing :Zr02 high temperature zirconia
Flow rate range 0.5~5 m/s
Withstand pressure ≤0.6MPa
Supply voltage lDC 24V
Output pulse amplitude| Vp≥8V
Normal pipe diameter DN15~DN100;DN125~DN600
Medium characteristic Single-phase medium(0~60℃)
Installation mode Direct line insertion

To rehydrate the glass membrane, you will need to soak the electrode in a storage solution or a buffer solution with a pH of around 4. This will help to remove any contaminants and rehydrate the glass membrane. It is important to ensure that the electrode is fully submerged in the solution and left to soak for at least 24 hours.


After soaking the electrode, you will need to calibrate the ph meter to ensure accurate readings. Calibration involves adjusting the ph meter to read the correct pH value of a buffer solution. This can be done using calibration solutions with known pH values. It is important to follow the manufacturer’s instructions for calibration to ensure accurate readings.

Model pH/ORP-5500 pH/ORP Online Meter
Range pH:0.00~14.00 ; ORP: (-2000~+2000)mV; Temp.:(0.0~99.9)°C (Temp.Compensation: NTC10K)
Resolution pH:0.01 ; ORP: 1mV; Temp.:0.1°C
Accuracy pH:+/-0.1 ; ORP: +/-5mV(electronic unit); Temp.: +/-0.5°C
Temp. compensation Range: (0~120)°C; element: Pt1000
Buffer Solution pH value 9.18; 6.86; 4.01; 10.00; 7.00; 4.00
Medium Temp. (0~50)°C (with 25°C as standard) manual/automatic temp. compensation for selection
Analog output Isolated (4~20)mA, Instrument/Transmitter for selection
Control Output Double relay output (ON/OFF); AC 240V/3A
Working Environment Temp.(0~50)℃; relative humidity <95%RH (non-condensing)
Storage Environment Temp.(-20~60)℃;Relative Humidity ≤85%RH (none condensation)
Power Supply DC 24V; AC 110V; AC220V
Power consumption <3W
Protection level IP65 (with back cover)
Dimension 96mmx96mmx105mm(HxWxD)
Hole Size 91mmx91mm(HxW)

In addition to rehydrating the glass membrane and calibrating the ph meter, it is important to properly store the electrode to prevent it from drying out in the future. The electrode should be stored in a storage solution or a buffer solution with a pH of around 4 when not in use. This will help to keep the glass membrane hydrated and maintain the accuracy of the pH readings.

It is also important to regularly clean the electrode to remove any contaminants that may affect its performance. Cleaning the electrode involves rinsing it with distilled water and wiping it with a soft cloth. It is important to avoid using harsh chemicals or abrasive materials that could damage the glass membrane.


In conclusion, a dried out ph meter electrode can affect the accuracy of pH readings and potentially damage the electrode. To revive a dried out ph meter electrode, it is important to rehydrate the glass membrane, calibrate the ph meter, and properly store the electrode. By following these steps, you can ensure accurate pH measurements and prolong the life of your ph meter electrode.

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