Five-in-One Water Testing Pen

Testing water for a pond, aquarium or hydroponic tank usually means several pens. This five-in-one tester shows pH, TDS, EC, salinity and temperature through one handheld unit.

✅ Check several readings with one pen - pH, TDS, EC, salinity and temperature are covered by one instrument.

✅ Compare samples at the same spot - A single unit avoids moving between meters and mixing calibration states.

✅ Read the sample where it is taken - The handheld format is used at the tank or the sample container.

Five readings, one pen

Calibrate before a session and store the electrode wet as the instructions describe; a dry electrode drifts and gives confident wrong numbers. Rinse between samples so one reading does not contaminate the next.

Each parameter has its own calibration and its own limits, and a pen of this type reads the sample it is dipped into, not the whole system. Treat readings as a guide and confirm important values with a calibrated instrument.

Technical details

• Five-in-one water testing pen
• pH, TDS, EC, salinity, temperature
• Handheld unit, no backlight version listed
• Calibrate before use

Calibrate, rinse, then read the sample.