Overview of PHC10103 Hach pH Electrode
PHC10103 is a digital combination pH electrode launched by Hach, belonging to the gel rugged series, with a cable length of 3 meters. This electrode has a built-in temperature sensor and adopts a double-junction reference design, making it suitable for on-site measurement scenarios such as wastewater treatment.
A pH electrode, also known as a pH probe or pH sensor, is the core component of a pH meter that contacts the substance being measured to determine the electrode potential. The PHC10103, when used with Hach HQ series instruments such as the HQ11D, enables high-precision pH and ORP measurement.

Core Technical Parameters
The PHC10103 electrode features a wide measurement range and high sensitivity. The following are the main technical specifications:
| Parameter | Specification |
|---|---|
| pH range | 0~14 pH |
| ORP range | -1500~+1500 mV |
| Sensitivity | H+: ±0.01 pH; ORP: ±0.5 mV |
| Temperature range | -5~95°C |
| Maximum pressure | 6.9 bar at 105°C |
| Probe material | PEEK, Ryton optional |
Among these, PEEK material offers excellent chemical corrosion resistance and low thermal distortion, suitable for sanitary installations; Ryton material has excellent compatibility with strongly alkaline substances.

Model Classification and Selection Guide
Gel Standard Combination Electrode
- pHC10101: 1-meter cable
- pHC10103: 3-meter cable
Gel Rugged Combination Electrode
- pHC10105: 5-meter cable
- pHC10110: 10-meter cable
- pHC10115: 15-meter cable
- pHC10130: 30-meter cable
Refillable Standard Combination Electrode
- pHC28101: 1-meter cable
- pHC28103: 3-meter cable
- pHC30101: 1-meter cable
- pHC30103: 3-meter cable
All gel-type and refillable electrodes are compatible with Hach HQ series instruments such as HQ14D, HQ30D, HQ40D, and HQ440D. When selecting a model, the specific model should be determined based on cable length, installation environment, and measurement medium.

Technical Advantages and Usage Points
The PHC10103 electrode has a built-in preamplifier, which effectively reduces signal interference and improves measurement stability. Its replaceable salt bridge design extends sensor service life and reduces long-term maintenance costs.
This electrode adopts a digital combination structure, integrating pH measurement, ORP measurement, and temperature compensation functions. The gel-filled double-junction reference system requires no refilling, making it suitable for rapid on-site deployment.
Typical Application Scenarios
- Continuous pH monitoring in wastewater treatment processes
- Industrial process water and discharge water testing
- Outdoor on-site measurements requiring rugged and durable probes
Installation and Maintenance Recommendations
- Select an appropriate cable length based on the installation location to avoid excessive pulling.
- Regularly check the salt bridge condition and replace it when necessary to extend electrode life.
- Avoid using under conditions exceeding 95°C or 6.9 bar pressure.
- Store the electrode in a dedicated storage solution when not in use to prevent the gel from drying out.

Compatible Instruments and Procurement Information
The PHC10103 can be used with Hach multi-parameter analyzers such as HQ11D, HQ14D, HQ30D, HQ40D, and HQ440D. Accessories such as the LDO 101 rugged dissolved oxygen probe (30-meter cable) can also be optionally configured as needed.
For more technical details or selection advice, it is recommended to consult relevant technical experts or refer to the product manual. Currently, this series of electrodes is in large stock, and we welcome your purchase.

