--- product_id: 728074927 title: "Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer" brand: "hm digital" price: "753 zł" currency: PLN in_stock: true reviews_count: 5 category: "Hm Digital" url: https://www.desertcart.pl/products/728074927-hydrofarm-hmdcom100-waterproof-ec-tds-and-temperature-combometer store_origin: PL region: Poland --- # 0-9990μS EC range IP67 waterproof rating 0.1°C temperature resolution Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer **Brand:** hm digital **Price:** 753 zł **Availability:** ✅ In Stock ## Summary > 💧 Stay ahead of the curve with precision water testing that works as hard as you do! ## Quick Answers - **What is this?** Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer by hm digital - **How much does it cost?** 753 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/728074927-hydrofarm-hmdcom100-waterproof-ec-tds-and-temperature-combometer) ## Best For - hm digital enthusiasts ## Why This Product - Trusted hm digital brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Sensor Tech:** Removable platinum electrode and 3 non-linear EC-to-TDS conversion modes for versatile, lab-grade testing. - • **Effortless Operation:** Auto-off, data retention, and low battery indicator ensure you never miss a beat in your workflow. - • **Compact & Ready to Go:** Lightweight 120g design with included cap and lanyard—perfect for on-the-go professionals. - • **Built to Brave the Elements:** IP67 waterproof housing means accidental drops or splashes won’t slow you down. - • **Precision at Your Fingertips:** Instant, accurate EC/TDS/Temp readings with ±2% accuracy keep your water quality in check. ## Overview The Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer delivers rapid, highly accurate measurements of electrical conductivity, total dissolved solids, and temperature with a wide range (0-9990μS EC, 0-8560ppm TDS) and ±2% accuracy. Featuring a rugged IP67 waterproof design, removable platinum electrode, and three non-linear EC-to-TDS conversion coefficients, it’s engineered for demanding applications from hydroponics to industrial water management. Lightweight and user-friendly with auto-off, data retention, and low battery alerts, this meter is a must-have for professionals who demand reliable, on-the-spot water quality insights. ## Description EC/TDS/Temporary Staff Combo-Meter Tester for Testing Water Quality μS mS ppm ppt Measurement Waste Regulation, Culture, Hydroponics, Colloidal Silver, Lab & Scientific Tests, Pool & Mines, Ecology Tests, Boiler & Cooling Towers, Water Handling, and More Good Functions 3. Non-linear EC-to-TDS Conversion Factor (KCl, 442TM, Sodium Chloride) Automatic Temperature Compensation (ATC) Waterproof housing Auto-off feature replaceable sensors Data retention function and low battery indicator included cap and lanyard: Batteries not included for safe delivery. Specifications EC Range: 0 - 9990 μS; 0 - 9.99ms TDS Range: 0 - 8560 ppm (mg/L); 0 - 8.56 ppt Temperature range: 0-80 °C; 32-176 °F Resolution: 0-99: 0.1 μS/ppm/ppt; 100-999: 1 μS/ppm; 1000-9990: 10 μS/ppm Temp. Resolution: 0.1°C/F Accuracy: +/-2% EC to TDS conversion coefficient: KCl, 442TM or sodium chloride solutions. Non-linear conversion for scale: digital scale Process: Separable platinum electrode Household: IP-67 waterproof clothing Power Supply: 2 x 1.5V AAA alkaline batteries (not included) Dimension: 7.3x1.3x1.3x1.3 inches Review: Great meter. Near instant readings, accurate, easy to calibrate and best of all, waterproof. I’ve accidentally dropped the whole meter into water, completely submerged for a few seconds with no problems. Review: تجربتي معه جيدة ## Features - Measures electrical conductivity (EC), total dissolved solids (TDS), temperature - EC TDS measurement range: 0-9990μS; 0-5000ppm (0.5 scale); 0-8560ppm (0.7scale) - Head protruding forward? Removable white gold electrode; replaces sensor - Three non-linear EC-to -TDS conversion coefficient (KCl, 442TM, Sodium Chloride) - Applications: waste water regulation, culture, hydroponics, colloidal silver, lab & scientific tests, pool & miners, ecology tests, boilers & cooling towers, water handling, and more ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0045LQFTK | | Additional Features | Non-Contact | | Age Range Description | Adult | | Amazon Bestseller | #182,510 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2,233 in Voltage Testers | | Brand Name | HM Digital | | Customer Reviews | 4.3 4.3 out of 5 stars (167) | | Global Trade Identification Number | 00891144000007 | | Item Weight | 120 Grams | | Manufacturer | HM ELECTRONICS | | Model | COM-100 | | Number of Batteries | 1 A batteries required. | | Outer Material | Plastic | | Part Number | COM-100 | | Power Source | Battery Powered | | Resolution | 0.1 degrees_celsius | | Response Time | 0.5 seconds | | UPC | 095225177507 891144000007 | | Unit Count | 1.0 Count | ## Product Details - **Age Range (Description):** Adult - **Brand:** HM Digital - **Global Trade Identification Number:** 00891144000007 - **Number of Batteries:** 1 A batteries required. - **Outer Material:** Plastic - **Power Source:** Battery Powered - **Response Time:** 0.5 seconds - **Special Feature:** Non-Contact - **UPC:** 095225177507 891144000007 - **Unit Count:** 1.0 Count ## Images ![Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer - Image 1](https://m.media-amazon.com/images/I/51hfD5nFZmL.jpg) ![Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer - Image 2](https://m.media-amazon.com/images/I/61IzVp26pKL.jpg) ![Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer - Image 3](https://m.media-amazon.com/images/I/61tCsxZirvL.jpg) ![Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer - Image 4](https://m.media-amazon.com/images/I/71wQtNYPw7L.jpg) ![Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer - Image 5](https://m.media-amazon.com/images/I/71qEIrsAZOL.jpg) ## Questions & Answers **Q: Can this unit be used to test PH?** A: FROM HM DIGITAL: The COM-100 is NOT a pH meter. It measures EC (electrical conductivity), TDS (total dissolved solids) and temperature. For pH, please purchase HM Digital's PH-200. For more information, please visit www.tdsmeter.com **Q: My meter want read over 999 or am I looking at the wrong ppm?** A: Select 442 scale. Your meter will read more than 999 ppm. **Q: Any trouble measuring in mS?** A: FROM HM-DIGITAL: The COM-100 is a professional waterproof EC/TDS meter that has three EC-TDS conversion factors and selectable modes allowing you to measure in the µs, mS, ppm and ppt scales. For more information, please visit, www.tdsmeter.com/products/com100.html **Q: Isn't one supposed to use calibrating and cleaning solution with this?** A: I clean mine with a wet Q-tip. There is a TDS calibration solution I use when I recalibrate every month. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by B***M on June 21, 2025* Great meter. Near instant readings, accurate, easy to calibrate and best of all, waterproof. I’ve accidentally dropped the whole meter into water, completely submerged for a few seconds with no problems. ### ⭐⭐⭐⭐ Review *by J***I on March 15, 2024* تجربتي معه جيدة ### ⭐⭐⭐⭐⭐ Review *by S***L on March 24, 2020* Great product for checking water quality. ## Frequently Bought Together - HM Digital HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter - HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue - HM Digital 1000ppm TDS Calibration Solution --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/728074927-hydrofarm-hmdcom100-waterproof-ec-tds-and-temperature-combometer](https://www.desertcart.pl/products/728074927-hydrofarm-hmdcom100-waterproof-ec-tds-and-temperature-combometer) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-25*