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Item #:
20458457
HM Digital COM-300 Waterproof pH Tester Combo Meter with Temperature, EC, and TDS Meter
Item #:
20458457
USD 140
Price Details
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*All items will import from US
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Imported from USA store
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Only 12 items left in stock.
Order now and get it around Monday, September 07
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The COM-300 is an advanced waterproof combo meter with superior accuracy.
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What Stands Out
Versatile Measurements
The HM Digital Com-300 efficiently measures pH, TDS, EC, and temperature, making it ideal for aquariums, hydroponics, and laboratory applications with comprehensive aquatic health insights.
User-Friendly Display
Equipped with a large LCD display, the meter allows for easy reading of results, ensuring accurate monitoring for both professionals and hobbyists in a variety of environments.
Durable Design
Built with robust materials, the Com-300 guarantees longevity and reliability in various settings, providing long-term value for users seeking precision in their measurements.
Product Details
- HM Digital COM-300 is a waterproof combo meter that measures 4 water parameters in one device: pH, electrical conductivity (EC), total dissolved solids (TDS), and temperature. As a reliable pH meter and TDS meter in one, it is well suited for hydroponic systems, water gardens, and ponds. The water tester features 2 conductivity conversion factors for converting EC to TDS using either the 0.5 (NaCl) or 0.7 (442) factor, with selectable measurement modes across µS, mS, and ppm scales. Automatic temperature compensation (ATC) accounts for natural temperature variations to keep readings consistent, while digital calibration makes it straightforward to fine-tune for precise results. The sump-type screened inlet design adds to its practical, field-ready build. Whether you need a dependable pH test tool or full water quality monitoring, HM Digital delivers accurate multi-parameter readings in a single handheld unit.
| Features | Automatic Temperature Compensation |
| Brand | HM Digital |
| Display | LCD |
| Has written warranty | No |
| Height | 8.1 in (20.6 cm) |
| Pack quantity | 1 |
| Model | COM-300 |
| Item Weight | 0.4 lbs (180 grams) |
Who Should Buy?
-
Hydroponics Enthusiasts
Ideal for individuals managing nutrient levels in hydroponic systems, ensuring healthy plant growth through accurate measurements.
-
Aquarium Owners
Perfect for aquarium hobbyists needing to monitor water quality accurately, which is crucial for fish health and environment.
-
Laboratory Technicians
Beneficial for lab settings requiring precise pH, TDS, and EC measurements in various chemical and biological experiments.
-
Casual Users
Not suitable for casual users or beginners who may find the calibration and readings too complex for simple tasks.
Product Description
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Customer Questions & Answers
-
Question:
Is the COM-300 meter waterproof?
Answer: Yes, the COM-300 is an advanced waterproof combo meter. -
Question:
What parameters does the COM-300 measure?
Answer: The COM-300 measures pH, electrical conductivity (EC), total dissolved solids (TDS), and temperature. -
Question:
Does the COM-300 feature automatic temperature compensation?
Answer: Yes, the meter incorporates automatic temperature compensation (ATC) to accommodate for discrepancies in temperature.
HM Digital PH and Thermometers Editorial Review
HM Digital COM-300 Waterproof pH Tester Combo Meter with Temperature, EC, and TDS Meter is a versatile tool featuring automatic temperature compensation, making it easy to get accurate readings in varying conditions. Users appreciate its lightweight design and LCD display, which enhances usability. Although this model doesn't come with a written warranty, its reliability as a pH tester is noted in several reviews. Many find that its combination of pH and TDS measurement capabilities in one device meets their needs effectively, making it a favorite for both professionals and enthusiasts.
Customer Reviews & Ratings
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Pros
- Automatic temperature compensation for accurate readings
- Lightweight and portable for easy handling
- LCD display for clear visibility in any light
- Combination of pH and TDS measurements
- User-friendly design for quick operation
Cons
- Does not include a written warranty
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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Chitra
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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23 July 2026 · via Trustpilot
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USD 140
Order now and get it around Monday, September 07
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 12 items left in stock.
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Features & Benefits
- Measures pH, EC, TDS, and temperature
- Features 2 conductivity conversion factors and selectable measurement modes
- Incorporates automatic temperature compensation (ATC)
- Digital calibration for precise results
- Ideal for hydroponic systems, water gardens, and ponds
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