Meter · HM Digital
COM-300 pH/EC/TDS/Temperature Meter
A waterproof handheld meter that combines several water measurements.
$189.95
Recorded 2026-10-08 · excludes shipping and tax. Confirm current price and availability with the retailer.
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Specifications
- Measurements
- pH, EC, TDS, salinity and temperature
- Ingress Rating
- IP67
- Listed Accuracy
- ±2%
- Calibration
- Factory calibrated; user calibration supported
- Sensor
- Replaceable
Specifications checked 2026-10-08.
Planning notes
Best use
A grow journal workflow that records nutrient-solution and water measurements with one handheld tool.
Before you buy
Budget for calibration and storage solutions, and follow the probe-care instructions.
Strengths noted
- One meter covers five common water measurements.
- The sensor is replaceable rather than permanently fixed.
Considerations
- Multi-parameter meters still need proper calibration and probe care.
- The listed ±2% accuracy does not replace a consistent testing routine.