- HM500 Hydromaster Monitor
- Replaceable pH Probe
- EC/TDS/Temp Probe
- AC Power Adapter
- Built-in Rechargeable Lithium-Ion Battery
- Wall Mounting Hardware
HM Digital Hydromaster HM500 - Continuous pH TDS EC Temp Meter
starting from 0% interest financing from
/mo.
- Tracks 4 water parameters simultaneously to provide real-time data on reservoir health
- Onboard memory stores up to 20 separate measurement readings to help you track trends
- Dual power system uses standard AC outlets or a built-in rechargeable lithium-ion battery
- 3-year warranty on the monitor body, 6-month warranty on the pH probe
- View More Details
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Who This Is For
- You are moving to real-time monitoring because manual testing is too slow to catch drift before it affects plant health.
- You are automating your reservoir alerts because drifting pH levels can lockout nutrients during your busiest hours.
What We Found
- The touchscreen stays responsive even with damp gloves, which makes quick adjustments much easier during tank swaps.
- The built-in battery is a hidden win because it keeps your data logging active even during a circuit breaker trip.
What Users Say
- Users who set the high-low alerts say they stopped manually checking the reservoir every hour to save labor time.
- Teams using the wall-mount setup say they caught nutrient spikes early just by walking past the digital display.
HM Digital Hydromaster HM500 - Continuous pH TDS EC Temp Meter
Precision monitoring is essential for high-yield hydroponics. The HM Digital Hydromaster HM500 provides a comprehensive, continuous look at your water quality, ensuring your plants always have the perfect nutrient balance. By tracking pH, EC, TDS, and Temperature in real-time, this professional-grade meter eliminates the guesswork and allows for immediate adjustments before problems arise.
Whether you are managing a commercial facility or a home grow, the HM500 is designed for reliability. It features a large, intuitive touchscreen that makes it easy to toggle between measurement scales like ppm and mS. If you are looking for a more compact option for spot-checking, the HM Digital Pro COM-300 pH TDS EC Temp Meter offers similar precision in a handheld format. For those needing a simpler continuous setup, the HM Digital Hydromaster HM100 is also a robust choice.
As part of the elite HM Digital lineup, the Hydromaster series is built to last. The HM500 includes programmable alerts that notify you the moment your parameters drift outside your target range. This proactive approach to reservoir management is what separates hobbyists from professional cultivators, ensuring your environment stays within the optimal range for plant health.
What's Included
Features
🚨
Programmable Sensors
Set custom alerts that notify you when your water parameters drift above or below your target limits.
🕒
Continuous Monitoring
Designed for round-the-clock usage to provide real-time data on your hydroponic reservoir health.
💾
Memory Storage
Store up to 20 measurement readings directly on the device to track trends and environmental changes.
📱
Touchscreen Interface
A large, responsive touchscreen makes navigating settings and checking readings simple and fast.
🔋
Energy-Saving Mode
The unit automatically shuts down after five minutes of inactivity to preserve battery life and power.
🔌
Dual Power Source
Operate using the built-in rechargeable battery for portability or plug into AC power for constant use.
Specifications
| Specification | Value |
|---|---|
| Measurement Scales | pH, Temp (°C, °F), TDS (ppm/ppt 0.5 & 0.7), EC (mS/µS) |
| pH Range | 0.1 – 14.0 pH |
| Temperature Range | 0.0 – 80.0 °C / 32.0 – 176 °F |
| TDS Range | 0 – 9999 ppm / 0 – 10.00 ppt |
| EC Range | 0 – 9999 µS / 0 – 20.00 mS |
| Accuracy | pH: ± 0.1 pH, Temp: ± 1 °C, TDS/EC: ± 2% |
| Power Source | AC 110V – 220V / Rechargeable Lithium Ion Battery |
| Sensor Cable | 24-inch shielded Coaxial Cable |
| Dimensions | 8 x 4 x 1.5 inches |
Warranty
The HM Digital Hydromaster HM500 is backed by a three-year warranty on the monitor body and a six-month warranty on the pH probe, ensuring long-term reliability for your grow operation.
FAQs
Can the pH probe be replaced?
Yes, the HM500 features a replaceable pH probe, allowing you to maintain the unit's accuracy without replacing the entire monitor.
Does it work with 220V power?
Yes, the included AC adapter is compatible with both 110V and 220V power sources.
How many readings can the memory store?
The internal memory storage allows you to save up to 20 measurement readings to help you track trends over time.
Is the monitor waterproof?
While the probes are designed for continuous submersion, the monitor unit itself should be mounted in a dry location away from direct water contact.
How often should I calibrate the probes?
For the highest precision, we recommend calibrating your probes at least once a month using standard calibration solutions.
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Questions About This Product?
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
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