--- product_id: 51745800 title: "HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy" brand: "hm digital" price: "£41.51" currency: GBP in_stock: true reviews_count: 8 category: "Hm Digital" url: https://www.desertcart.co.uk/products/51745800-hm-digital-tds-3-handheld-tds-meter-with-carrying-case store_origin: GB region: United Kingdom --- # ±2% accuracy 0-9990 ppm range 3-hour battery life HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy **Brand:** hm digital **Price:** £41.51 **Availability:** ✅ In Stock ## Summary > 💧 Stay ahead of water quality—because pure is the new power move. ## Quick Answers - **What is this?** HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy by hm digital - **How much does it cost?** £41.51 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/51745800-hm-digital-tds-3-handheld-tds-meter-with-carrying-case) ## 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 Data Capture:** Hold function saves readings for easy logging and hassle-free reporting. - • **Dual-Function Display:** Large, easy-to-read LCD shows both TDS levels and temperature for comprehensive water analysis. - • **Built for On-the-Go Pros:** Includes rugged carrying case with belt clip—perfect for fieldwork and quick checks anywhere. - • **Trusted Industry Standard:** World’s most popular handheld TDS meter, favored by commercial and industrial users alike. - • **Precision at Your Fingertips:** Instantly measure water purity with 1 ppm resolution for professional-grade accuracy. ## Overview The HM Digital TDS-3 is a handheld Total Dissolved Solids meter designed for precise water quality testing with a 0-9990 ppm range and 1 ppm resolution. Featuring ±2% accuracy, a built-in digital thermometer, and a large LCD screen, it offers reliable, instant readings. Its rugged carrying case with belt clip and hold function make it ideal for professionals needing quick, accurate water purity checks in commercial, industrial, and home settings. ## Description Product Description: A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. With the push of a button, the TDS-3 can tell you your overall water purity level, which will be displayed on the screen in ppm (parts per million). The lower the TDS level, the purer the water, with 0 ppm being pure H2O. The TDS-3 is great for checking your tap water quality, or knowing when to change a filter. (The meter does not test for biological contaminants.) The TDS-3 is a great tool for drinking water, water filtration and purification, colloidal silver, hydroponics (test your nutrients), aquariums, RO/DI systems, pools and spas, commercial and industrial applications and more. The TDS-3 is a rugged model that includes a protective carrying case. This is the world's most popular handheld TDS meter for industry professionals. Review: Perfect checking water filter performance - After a month’s use monitoring drinking water, I've found it accurate and consistent. The unit delivered came with batteries and a carrying case included. Also included was a note from the suppliers asking me to get in touch if I noticed any errors - nice touch. Some reviewers have noted continuing varying read outs. I've noticed something similar when used with hot water but didn't find this a problem as it was mostly used with room temp water. In my opinion, it's accurate to within plus/minus 2%. This is based on ongoing readings given on municipal water, distilled water and stored samples. Granted, these aren't 'standard' samples but over time these samples confirmed the unit's accuracy and repeatability, in my opinion. I bought it to use as a quick check on my Brita water filter's performance and this it did admirably. Review: Excellent product, really simple to use. - I use the product to test my fish tanks and pond water. Also test my tap water. ## Features - Its Ideal for Commercial Use - Its Includes a Carrying Case with Belt Clip - Hold Function: Saves Measurements for Convenient Reading and Recording - Highly Efficient and Accurate Due to Its Advanced Microprocessor Technology - Built-in Digital Thermometer, Display: Large and Easy-to-read LCD Screen. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000VTQM70 | | Age Range Description | Adult | | Age range (description) | Adult | | Battery Life | 3 Hours | | Best Sellers Rank | 326,151 in DIY & Tools ( See Top 100 in DIY & Tools ) 812 in Multi Testers | | Brand | HM Digital | | Colour | Style 1 | | Customer Reviews | 4.4 out of 5 stars 1,756 Reviews | | Display Type | Digital | | Global Trade Identification Number | 00826333000001 | | Included Components | Carrying case, 2 x 1.5V button cell batteries | | Included components | Carrying case, 2 x 1.5V button cell batteries | | Indoor Outdoor Usage | Indoor | | Item Length | 1 Inches | | Item Weight | 0.2 Grams | | Manufacturer | HM Digital | | Manufacturer Part Number | TDS-3 | | Model Name | TDS-3 | | Model Number | TDS-3 | | Number of Batteries | 2 LR44 batteries required. (included) | | Outer Material | Plastic | | Outer material | Plastic | | Power Source | Battery Powered | | Product Care Instructions | Wipe Clean | | Resolution | 1 ppm | | Reusability | Single Use | | Smart Home Compatibility | Not Smart Home Compatible | | Special Features | High Accuracy | | Special feature | High Accuracy | | Specification Met | Tds | | Style Name | Contemporary | | UPC | 891144000083 826333000001 | | Unit Count | 1.0 count | | Upper Temperature Rating | 9990 Degrees Celsius | ## Product Details - **Age range (description):** Adult - **Brand:** HM Digital - **Colour:** Style 1 - **Display type:** Digital - **Included components:** Carrying case, 2 x 1.5V button cell batteries - **Outer material:** Plastic - **Product care instructions:** Wipe Clean - **Special feature:** High Accuracy - **Specification met:** Tds - **Unit count:** 1.0 count ## Images ![HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy - Image 1](https://m.media-amazon.com/images/I/512msUopWxL.jpg) ![HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy - Image 2](https://m.media-amazon.com/images/I/61HMBs6FSjL.jpg) ![HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy - Image 3](https://m.media-amazon.com/images/I/61u+PIX2faL.jpg) ![HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy - Image 4](https://m.media-amazon.com/images/I/61HLc3eAlpL.jpg) ![HM Digital TDS-3 Handheld TDS Meter with Carrying Case, 0-9990 ppm TDS Measurement Range, 1 ppm Resolution, 2% Readout Accuracy - Image 5](https://m.media-amazon.com/images/I/811R9g1lQSL.jpg) ## Questions & Answers **Q: Does this TDS compensate for differences in temperature like the HM Digital TDS-4?** A: Yes if it was a real HM TDS meter but it is not. It's a knock off. Go to manufacturer's webpage and find a dealer in your area and order it there if you want a real meter. I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT. The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate. The knock-off simply has a hole and no printed words about calibration on it. The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not. Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM. **Q: Where is this item made?** A: This is a a knock-off. I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT. The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate. The knock-off simply has a hole and no printed words about calibration on it. The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not. Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM. **Q: Does this teat for lead , mercury, cadmium and other metals? If so, does it tell you concentrations?** A: No, it does not test for any specific dissolved solid. It tells you the purity of the water only. In other words, how close is the water sample is to distilled water. **Q: The one I bought seems to work however it has no way to adjust it there is a hole in the back but no screw is it a imposter?** A: That's because it's a knock-off. I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT. The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate. The knock-off simply has a hole and no printed words about calibration on it. The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not. Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect checking water filter performance *by T***K on 19 June 2021* After a month’s use monitoring drinking water, I've found it accurate and consistent. The unit delivered came with batteries and a carrying case included. Also included was a note from the suppliers asking me to get in touch if I noticed any errors - nice touch. Some reviewers have noted continuing varying read outs. I've noticed something similar when used with hot water but didn't find this a problem as it was mostly used with room temp water. In my opinion, it's accurate to within plus/minus 2%. This is based on ongoing readings given on municipal water, distilled water and stored samples. Granted, these aren't 'standard' samples but over time these samples confirmed the unit's accuracy and repeatability, in my opinion. I bought it to use as a quick check on my Brita water filter's performance and this it did admirably. ### ⭐⭐⭐⭐⭐ Excellent product, really simple to use. *by R***L on 30 October 2021* I use the product to test my fish tanks and pond water. Also test my tap water. ### ⭐⭐⭐⭐ Happy with it so far. *by I***N on 4 July 2021* So far the HM Digital TDS 3 seems to work fine. Only used it once so only 4 stars as I have not had enough time to determine its accuracy, perhaps 5 stars is deserved. It's easy to use one read and so far I have no issues with it. ## Frequently Bought Together - HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy - HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue - HoneForest Water Quality Tester, Accurate and Reliable, TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc. --- ## 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.co.uk/products/51745800-hm-digital-tds-3-handheld-tds-meter-with-carrying-case](https://www.desertcart.co.uk/products/51745800-hm-digital-tds-3-handheld-tds-meter-with-carrying-case) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-18*