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Item #:
101472049
HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy
Item #:
101472049
SCR 889
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The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more.
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What Stands Out
High Resolution
With a 1 ppm resolution, the COM-80 provides precise readings of total dissolved solids, ideal for users requiring accuracy in water quality measurements.
Wide Range
Covering a conductivity range of 0-5000 ppm, this hydro tester effectively addresses a variety of applications, from aquariums to hydroponics, making it versatile for different users.
User-Friendly Design
Featuring a compact and portable design, the COM-80 ensures easy handling and convenient storage, catering to both amateur and professional users seeking reliability on-the-go.
Product Details
- Measures electrical conductivity (EC) and total dissolved solids (TDS)
- Ideal for testing applications such as hydroponics, gardening, pools, spas, aquariums, and water ionizers
- Suitable for commercial applications like boilers, cooling towers, and filtration systems
- Four scales available: EC in µS and mS, TDS in ppm and ppt
- Automatic Temperature Compensation (ATC)
- Water-resistant design for added durability
| Special Features | Waterproof |
| Display Type | Digital |
| Power Source | Battery Powered |
| Number of Batteries | 3 LR44 batteries required. |
| Upper Temperature Rating | 9990 Degrees Celsius |
| Response Time | 0.5 seconds |
| Reusability | Rechargeable |
| Immersion Depth | 15.5 Centimetres |
| Indoor Outdoor Usage | Outdoor |
| Battery Life | 2 tyears |
| Resolution | 1 u00b5S/ppm; 0.1 mS |
| Outer Material | Plastic or Rubber |
| Product Care Instructions | Wipe Clean |
| Inner Material | Plastic/Rubber |
| Colour | White |
| Style Name | Minimalist |
| Brand | HM Digital |
| Age Range Description | All Ages |
| Included Components | Protective cap, 3 x 1.5V button cell batteries (LR44 or equivalent) |
| Model Name | HydroTester |
| Model Number | EC/TDS HydroTester Series |
| Country Of Origin | China |
| UPC | 891144000229 |
| Global Trade Identification Number | 00891144000229 |
| Manufacturer | HM Digital |
| Item Weight | 59 g |
| Manufacturer Part Number | COM-80 |
| Specification Met | 0-9990 u00b5S; 0-5000 ppm; 0-9.9 mS; 0-5.0 ppt |
| Unit Count | 1.0 count |
| Item Length | 15.3 Centimetres |
| Special feature | Waterproof |
| Age range (description) | All Ages |
Who Should Buy?
-
Aquarium Enthusiasts
Ideal for hobbyists managing fish tanks, ensuring optimal water quality through precise TDS readings.
-
Hydroponics Users
Excellent for growers who need to monitor nutrient levels in their hydroponic systems for healthy plant growth.
-
Laboratory Testing
Suitable for researchers requiring accurate conductivity measurements for various water quality testing applications.
-
Industrial Use
Not designed for heavy-duty industrial applications where higher ranges or robustness are needed.
Product Description
HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What does EC and TDS measurement mean?
Answer: EC stands for electrical conductivity, which measures how well a solution conducts electricity. TDS stands for total dissolved solids, which is a measure of the concentration of dissolved substances in a solution. -
Question:
What is Automatic Temperature Compensation?
Answer: Automatic Temperature Compensation (ATC) is a feature that automatically adjusts the reading based on the temperature of the solution being tested. -
Question:
Is the COM-80 suitable for commercial use?
Answer: Yes, the COM-80 is suitable for commercial applications such as boilers and cooling towers, filtration and purification systems, etc.
HM Digital Test Kits EC/TDS HydroTester Series Editorial Review
The HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro Tester has garnered positive reception from users, who appreciate its performance and reliability in measuring conductivity and TDS levels. Customers have remarked on the device's accuracy, with readings typically available in merely 2–3 seconds, making it a practical tool for both amateur growers and those involved in small-scale hydroponics. The built-in temperature display adds an additional layer of convenience, particularly valued by users managing multiple growing buckets. Many reviewers highlight the sturdy Construction of the tester, favorably comparing it to more traditional, less durable pH pens. The device arrives pre-calibrated, which is a significant plus for users, as it eliminates the need for additional calibration routines and ensures immediate usability. Quality has emerged as a common theme, with several users expressing surprise at the high standard of the tester given its compact size and affordability. Overall, users feel confident in their purchase from HM Digital, indicating a strong loyalty to the brand. In conclusion, the HM Digital COM-80 is viewed as an excellent investment for anyone needing a reliable and efficient way to monitor water quality in hydroponic systems or aquariums. It balances performance, durability, and user-friendliness, making it a recommended product in its category. **
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Pros
- Fast and accurate readings (2-3 seconds)
- Durable, well-built Construction
- Pre-calibrated for immediate use
- Includes temperature display
- Good quality for the price
- Reputable brand with positive user feedback
Cons
- Limited to non-professional use scenarios
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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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SCR 889
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Features & Benefits
- Economical and reliable meter for EC/TDS measurement
- Suitable for various applications such as hydroponics, gardening, pools & spas, aquariums & reef tanks, etc.
- Four scales available for measurement
- Automatic Temperature Compensation (ATC)
- Water-resistant
- Ideal for nutrient testing
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