HM Digital COM-300L pH EC TDS Meter - Waterproof 5-in-1 Professional Tester replacement sensor ✅ Easy installation — drop-in

✅ Easy installation — drop-in replacement

9%/°C) Power Supply 3 x 1

The battery percent level is displayed at start up alerting the user to the remaining battery power that is available

Why This Filter Outperforms Standard Replacements

1 non-slip rubber base ring

HM Digital COM-300L pH EC TDS Meter - Waterproof 5-in-1 Professional Tester replacement sensor ✅ Easy installation — drop-inProfessional 5 in 1 Waterproof pH EC TDS Salinity Temperature Meter The HM Digital COM 300L is a professional grade waterproof combo meter that measures pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity, and Temperature in a single rugged instrument. With IP 67 waterproof rating, digital calibration, and replaceable probe technology, this meter delivers lab quality results for hydroponics, water treatment, aquaculture, pools,