Introduction
The PC101 Water Quality Tester is designed for quick and accurate measurement of pH and Chlorine (CL2) levels in swimming pools, aquariums, and spas. This device provides instant readings, eliminating the need for complex color matching charts. It is an essential tool for maintaining optimal water quality.

Image: The PC101 Water Quality Tester, showing the main handheld unit, the separate probe with two electrodes, and the coiled cable connecting them.
Setup
- Battery Installation: The PC101 requires one (1) AA 1.5V Alkaline battery (not included). Open the battery compartment, insert the battery with correct polarity, and close the compartment securely.
- Probe Connection: Ensure the probe is securely connected to the main unit.
- Initial Adjustment (Chlorine): Before testing chlorine levels, the meter must be adjusted to the "adjustment point." Refer to the operating instructions for detailed steps on this calibration.
Operating Instructions
General Usage Notes:
- Do not immerse the probe in any liquid other than pool or spa water.
- Always ensure the probe is clean before and after use.
Testing Chlorine (CL2) Level:
- Preparation: Ensure the unit is powered on and the probe is clean.
- Adjustment: Before each chlorine test, adjust the meter to the "adjustment point" as indicated on the device. This typically involves placing the probe in a known solution or following a specific procedure outlined on the device itself (often a dial or switch).
- Immersion: Carefully immerse the probe into the water you wish to test (pool, spa, aquarium).
- Reading: Wait for the reading to stabilize on the large screen. The safe measure range for Chlorine Level is 1.2 to 1.7 ppm.
Testing pH Level:
- Preparation: Ensure the unit is powered on and the probe is clean.
- Immersion: Carefully immerse the probe into the water you wish to test.
- Reading: Wait for the reading to stabilize on the large screen. The safe measure range for pH Level is 7.2 to 7.8.

Image: A close-up view of the PC101 tester's display, showing the analog scales for pH and Chlorine levels with color-coded indicators for ideal ranges.
Maintenance
- Cleaning the Probe: After each use, gently rinse the probe with clean water and wipe it dry with a soft cloth. Do not use abrasive materials or harsh chemicals.
- Storage: Store the PC101 tester in a dry, cool place, away from direct sunlight and extreme temperatures. Ensure the probe is protected from damage.
- Battery Replacement: If the display becomes dim or readings are inconsistent, replace the AA 1.5V battery.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display or dim display | Low or dead battery | Replace the 1.5V AA battery. |
| Inaccurate Chlorine readings | Meter not adjusted to "adjustment point" before testing | Ensure the meter is adjusted correctly before each chlorine test. |
| Inconsistent readings | Dirty probe electrodes; Battery low | Clean the probe electrodes thoroughly; Replace battery. |
| Probe damage | Physical damage or immersion in non-pool/spa liquids | Avoid immersing the probe in liquids other than pool/spa water. Handle with care. Replacement probe may be required. |
Specifications
- Model: PC101
- Chlorine Level Safety Range: 1.2 to 1.7 ppm
- pH Level Safety Range: 7.2 to 7.8
- Power Supply: 1 x AA 1.5V Alkaline Battery (not included)
- Main Unit Dimensions: Approximately 190 x 120 mm
- Probe with Handle Length: 150 mm
- Probe (electrode part only) Length: 48 mm (excluding black band)
- Cable Length: 130 mm
- Display Features: Wireless
Warranty and Support
No specific warranty or support information is provided with this product. For any issues, please refer to the troubleshooting section or contact your retailer.





