--- product_id: 177148819 title: "HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter" brand: "hm digital" price: "NZ$169" currency: NZD in_stock: true reviews_count: 6 category: "Hm Digital" url: https://www.desertcart.nz/products/177148819-hm-digital-com100-waterproof-ec-tds-and-temperature-combo-meter store_origin: NZ region: New Zealand --- # 0.5 sec rapid response Waterproof design Rechargeable with 2 AAA batteries HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter **Brand:** hm digital **Price:** NZ$169 **Availability:** ✅ In Stock ## Summary > 💧 Stay ahead of water quality with precision and style! ## Quick Answers - **What is this?** HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter by hm digital - **How much does it cost?** NZ$169 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/177148819-hm-digital-com100-waterproof-ec-tds-and-temperature-combo-meter) ## 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 - • **Eco-Smart Power:** Rechargeable and powered by 2 AAA batteries, ensuring long-lasting use without frequent replacements. - • **Auto-Off Convenience:** Smart auto-off feature preserves battery life so you’re always ready when it counts. - • **Compact & Lightweight:** Sleek, portable design (only 120g) fits perfectly in your toolkit or pocket for on-the-go testing. - • **Built for Every Environment:** Fully waterproof construction means reliable performance indoors or outdoors—rain or shine. - • **Precision at Your Fingertips:** Digital display delivers instant, accurate TDS and temperature readings in just 0.5 seconds. ## Overview The HM Digital COM100 is a professional-grade waterproof TDS and temperature meter designed for fast, accurate water quality testing. Featuring a digital display with a lightning-fast 0.5-second response time, rechargeable power via 2 AAA batteries, and an auto-off function, it’s perfect for both indoor and outdoor use. Compact and lightweight, this tool ensures you never miss a beat in monitoring water purity. ## Description Product Description ## Features - TDS Meter - hydrotester - ec meter - com100 - water testing tds meter - water tds meter - Waterproof tds meter - water testing meter - water tester - water testing ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0045LQFTK | | Age Range (Description) | Adult | | Age Range Description | Adult | | Best Sellers Rank | #55,235 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #120 in Conductivity Meters & Accessories | | Brand | HM Digital | | Brand Name | HM Digital | | Colour | white | | Country of Origin | Korea, Republic of | | Customer Reviews | 4.3 out of 5 stars 172 Reviews | | Display Type | Digital | | Global Trade Identification Number | 00891144000007 | | Importer Contact Information | hm digital | | Included Components | Model | | Indoor Outdoor Usage | Indoor, Outdoor | | Item Length | 18 Centimetres | | Item Type Name | tds meter | | Item Weight | 120 Grams | | Manufacturer | HM Digital, hm digital | | Manufacturer Contact Information | hm digital | | Model Name | COM100 | | Model Number | COM-100 | | Number of Batteries | 1 A batteries required. | | Outer Material | Plastic | | Outer Material Type | Plastic | | Packer Contact Information | hm digital | | Part Number | COM-100 | | Power Source Type | बटरी सचालित | | Product Care Instructions | Hand Wash Only | | Response Time | 0.5 Seconds | | Reusability | Rechargeable | | Special Feature | Auto Off | | Special Features | Auto Off | | Specification Met | TDS | | UPC | 095225177507 891144000007 | | Unit Count | 1 Count | ## Product Details - **Brand:** HM Digital - **Special Feature:** Auto Off - **Colour:** white - **Age Range (Description):** Adult - **Included Components:** Model ## Images ![HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter - Image 1](https://m.media-amazon.com/images/I/51hfD5nFZmL.jpg) ![HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter - Image 2](https://m.media-amazon.com/images/I/61IzVp26pKL.jpg) ![HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter - Image 3](https://m.media-amazon.com/images/I/61tCsxZirvL.jpg) ![HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter - Image 4](https://m.media-amazon.com/images/I/71wQtNYPw7L.jpg) ![HM Digital COM100 Waterproof EC/TDS And Temperature Combo Meter - 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 P***R on 26 August 2016* ### ⭐⭐⭐⭐⭐ Review *by B***M on 21 June 2025* ### ⭐⭐⭐⭐ Review *by J***I on 15 March 2024* ## 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.nz/products/177148819-hm-digital-com100-waterproof-ec-tds-and-temperature-combo-meter](https://www.desertcart.nz/products/177148819-hm-digital-com100-waterproof-ec-tds-and-temperature-combo-meter) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-05-02*