Meter · HM Digital
HydroMaster 500 Continuous Monitor
A continuous pH, EC, TDS and temperature monitor with alarms.
$269.95
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 and temperature
- Display
- Backlit LCD touchscreen
- Alarms
- Adjustable high and low
- Storage
- Up to 20 readings
- Mounting
- Portable, wall or benchtop
- Power
- Rechargeable battery
Specifications checked 2026-10-08.
Planning notes
Best use
A reservoir-centered hydroponic setup where pH and conductivity trends matter throughout the day.
Before you buy
Plan probe placement and a maintenance schedule; the monitor observes conditions but does not dose or correct them.
Strengths noted
- Continuous readings and alarms can expose drift between manual checks.
- The display stores up to 20 measurements and supports several mounting positions.
Considerations
- The higher price only pays off when continuous monitoring is useful.
- Both probes still need cleaning, calibration and correct storage.