HM Digital Pro COM-300 pH TDS EC Temp Meter
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Is the HM Digital Pro COM-300 pH TDS EC Temp Meter Right for You?
If you need a comprehensive water quality testing solution, the HM Digital Pro COM-300 is an excellent option. This multi-functional meter provides precise readings for pH, TDS, EC, salinity, and temperature, making it ideal for hydroponics, water treatment, and laboratory applications. With a large LCD screen, automatic temperature compensation, and digital calibration, the COM-300 ensures accurate and reliable measurements.
- Features & Benefits
- Product Specifications
- What is included?
- Warranty Policy
HM Digital Pro COM-300 pH TDS EC Temp Meter
The HM Digital Pro COM-300 is a versatile water quality meter designed for precision testing of pH, TDS, EC, salinity, and temperature. Ideal for hydroponics, water treatment, and laboratory applications, this advanced meter ensures accurate readings with ease.
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Measures pH, TDS, EC, salinity & temperature. -
Digital calibration for quick, precise adjustments.
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ATC ensures accuracy in all conditions.
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Battery-powered with auto-shutoff for efficiency.
Why Choose the HM Digital Pro COM-300 pH TDS EC Temp Meter?
The HM Digital Pro COM-300 is an all-in-one water quality meter designed for those who need precise pH, TDS, EC, salinity, and temperature measurements. With advanced digital calibration and automatic temperature compensation, it ensures accurate and consistent results for hydroponics, water treatment, and laboratory applications. Featuring a large LCD display, IP65 water-resistant design, and energy-saving auto-shutoff, the COM-300 is built for durability and ease of use. Whether for professional or personal use, this meter provides reliable performance every time.
Why HM Digital?
HM Digital is a trusted name in water quality testing, offering innovative and reliable solutions for growers, aquarium enthusiasts, and professionals. Designed for precision, its advanced meters provide accurate TDS and temperature readings, ensuring optimal water conditions. With user-friendly features like digital calibration and a durable, water-resistant design, HM Digital products help you maintain consistency and efficiency in your water monitoring routine.
Why Buy From Us?
At GreenThumbDepot, you're not just another sale to a faceless corporation. You're partnering with a team genuinely invested in your success. Our legendary customer service, combined with a promise of unbeatable prices, sets us apart. We're here for you, always.
FAQ Section
Specifications 
| HM Digital Pro COM-300 pH TDS EC Temp Meter Specifications | |
|---|---|
| pH Range | 0 – 14 pH |
| EC Range | 0 – 9990 µS; 0 – 9.99 mS |
| TDS Range | 0 – 8560 ppm (0.7 Scale); 0 – 5000 ppm (0.5 Scale) |
| Temperature Range | 0-55 °C; 32-130 °F |
| Resolution | pH: 0.1 pH EC: 0 – 999: 1µS, 1000 – 9990: 10µS, 0-9.99 mS: 0.01 mS TDS: 0 – 999: 1 ppm, 1000 – 9990: 10 ppm Temperature: 0.1 °C/°F |
| Accuracy | +/- 2% |
| EC to TDS Conversion | Non-linear conversions for KCl, 442™ or NaCl solutions, selectable by the user |
| Probe | Detachable platinum electrodes & pH glass sensor with reference tube electrodes |
| Housing | IP-67 Waterproof (submersible; floats) |
| Power Source | 2 x AAA batteries (included) |
| Dimensions | 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches) |
| Weight | 101.5 g (3.6 oz) |
What’s in the Box? ![]()
The HM Digital Pro COM-300 pH TDS EC Temp Meter package includes:
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HM Digital Pro COM-300 pH TDS EC Temp Meter
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Detachable platinum electrode & pH glass sensor with reference tube electrodes
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2 x AAA batteries (pre-installed)
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User manual with setup, calibration, and maintenance guide
Warranty Policy
Please check out the manufacturers website for Warranty related issues.
