- HM Digital Pro COM-100 TDS EC Temp Meter
- Protective Cap
- 2 x AAA Batteries
- User Manual
HM Digital Pro COM-100 TDS EC Temp Meter
$89.99 USD
starting from 0% interest financing from
/mo.
- Measures EC up to 9.99 mS and TDS up to 8560 ppm for precise nutrient management
- IP-67 rated waterproof housing is fully submersible and floats for easy retrieval from tanks
- Powered by two standard AAA batteries with an auto-shutoff feature to preserve power between tests
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Who This Is For
- You are dialing in nutrient concentrations because inconsistent dosing is causing unpredictable growth rates.
- You are tracking reservoir runoff because you need to know exactly how much your crop is consuming.
What We Found
- We like that this unit floats because searching for a sunken meter at the bottom of a deep tank is a huge hassle.
- The AAA batteries are a major upgrade over the coin cells found in cheaper pens that always die when you need them.
- We noticed the digital calibration holds its accuracy much longer than the manual screw-turn style meters.
What Users Say
- Operators who switched to this pen say they stopped wasting time recalibrating their gear every single morning.
- Users tell us the large screen makes it much easier to log reservoir data in the low light of a grow environment.
- Commercial staff report fewer runoff errors since the meter provides EC and TDS readings on a single screen.
HM Digital Pro COM-100 TDS EC Temp Meter
Maintaining the perfect nutrient balance is critical for a successful harvest, yet many growers struggle with inconsistent readings and complex tools. The HM Digital Pro COM-100 TDS EC Temp Meter eliminates the guesswork, providing professional-grade precision in a rugged, pen-sized format. Whether you are managing a commercial facility or a home garden, this meter is the gold standard for monitoring water quality and nutrient strength.
This versatile device measures Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature simultaneously. For growers who require even more comprehensive data, including pH levels, we recommend the HM Digital Pro COM-300 pH TDS EC Temp Meter. The COM-100 is engineered for durability and ease of use, featuring digital calibration and a large, easy-to-read LCD screen that ensures you get the right data every time.
As a staple in the HM Digital lineup, this meter is built to withstand the humid conditions of a grow room. It integrates seamlessly into your grow supplies toolkit, allowing for rapid testing of reservoirs and runoff. For those looking for a more entry-level solution for basic TDS testing, the HM Digital Pen Style COM-80 TDS EC Temp Meter is an excellent alternative.
What's Included
Features
📊
Simultaneous Readings
Measures EC, TDS, and temperature levels simultaneously for efficient water testing.
🔘
Digital Calibration
One-button automatic calibration ensures you maintain professional accuracy at all times.
📺
Large LCD Display
A high-contrast digital display ensures measurements are easy to read in any environment.
🔋
Battery-Operated
Powered by two AAA batteries with an auto-shutoff feature to maximize energy efficiency.
💧
IP-67 Waterproof
Fully waterproof housing that is submersible and floats for safe use in deep reservoirs.
Specifications
| Specification | Value |
|---|---|
| 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 | 0.1 µS/ppm (0-99); 1 µS/ppm (100-999); 10 µS/ppm (1000-9990) |
| Accuracy | +/- 2% |
| Conversion Factor | Non-linear conversions for KCl, 442TM or NaCl |
| Probe | Detachable platinum electrodes |
| Housing | IP-67 Waterproof (submersible; floats) |
| Power Source | 2 x AAA Batteries (included) |
| Dimensions | 18.5 x 3.4 x 3.4 cm |
Warranty
The HM Digital Pro COM-100 is backed by a manufacturer's warranty covering defects in materials and workmanship. Please contact HM Digital or your authorized retailer for specific terms and claim procedures.
FAQs
What is the difference between EC and TDS?
EC (Electrical Conductivity) measures the water's ability to conduct electricity, which is directly related to the concentration of dissolved nutrients. TDS (Total Dissolved Solids) is a calculation of the total weight of dissolved solids, often converted from the EC reading using a specific scale (like 0.5 or 0.7).
How often should I calibrate the COM-100?
For best results, calibrate your meter once a month or before taking critical measurements. Frequent calibration ensures the sensors remain accurate, especially if you are testing high-concentration nutrient solutions.
Is the COM-100 probe replaceable?
Yes, the COM-100 features detachable platinum electrodes, allowing you to replace the sensor probe without having to purchase an entirely new digital meter.
Can this meter be used for saltwater aquariums?
Yes, the COM-100 is suitable for a wide range of water testing applications, including hydroponics, water purification, and aquaculture, provided the levels fall within the meter's specified range.
What does the IP-67 rating mean?
An IP-67 rating means the meter is completely dust-tight and can be submerged in water up to 1 meter deep for 30 minutes. It is also designed to float if dropped in a reservoir.
Happy To Help
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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