--- product_id: 49973872 title: "TDS-4 Pocket Size TDS Meter" brand: "hm digital" price: "€ 47.23" currency: EUR in_stock: true url: https://www.desertcart.fr/products/49973872-tds-4-pocket-size-tds-meter store_origin: FR region: France --- # Auto-off after 10 min 0-9990 ppm range Lightest & smallest design TDS-4 Pocket Size TDS Meter **Brand:** hm digital **Price:** € 47.23 **Availability:** βœ… In Stock ## Summary > πŸ’§ Pocket-sized precision for water quality pros on the move! ## Quick Answers - **What is this?** TDS-4 Pocket Size TDS Meter by hm digital - **How much does it cost?** € 47.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/49973872-tds-4-pocket-size-tds-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 - β€’ **Effortless Portability:** Weighing just 34g and compactly designed, it fits seamlessly into your daily carry for on-the-go testing. - β€’ **Smart Power Management:** Auto-off feature conserves battery life, delivering up to 1000 hours of reliable use without interruptions. - β€’ **Versatile Water Testing:** Perfect for aquariums, hydroponics, pools, and drinking waterβ€”join the community prioritizing pure water. - β€’ **Precision in Your Pocket:** Measures TDS from 0 to 9990 ppm with 1 ppm resolution for ultra-accurate water quality insights. - β€’ **User-Friendly Calibration:** Factory calibrated with easy recalibration via mini-screwdriver ensures consistent, trustworthy readings. ## Overview The HM Digital TDS-4 is the smallest and lightest Total Dissolved Solids meter on the market, offering a wide measurement range of 0-9990 ppm with high accuracy. Featuring automatic temperature compensation, a large LCD display, and an auto-off function to extend battery life, it’s factory calibrated and easily recalibrated for consistent performance. Ideal for professionals and enthusiasts in water purification, aquaculture, hydroponics, and pool maintenance, this sleek, portable device ensures you never compromise on water quality wherever you go. ## Description HM Digital TDS-4 Pocket Size TDS Meter ## Features - πŸ”Ή The TDS-4 is ideal for all water purification applications - πŸ”Ή The smallest and lightest TDS meter on the market & perfect for personal or consumer use - πŸ”Ή Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1 ppm. From 1000 to 9990 ppm, the resolution is in increments of 10 ppm - πŸ”Ή Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver - πŸ”Ή Recommended for fresh water aquariums & aquaculture, horticulture & hydroponics, and pools & spas. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | HM Digital | | Part number | TDS-4 | | Item Weight | 41 g | | Product Dimensions | 20.83 x 7.11 x 1.78 cm; 41 g | | Batteries | 2 LR44 batteries required. | | Item model number | TDS-4 | | Style | Contemporary | | Material | Silver | | Power source type | Battery Powered | | Item Package Quantity | 1 | | Display style | LCD | | Special Features | ATC, Auto Off, High Accuracy, Hold Function | | Included components | 2 x 1.5V button cell batteries (LR44) | | Batteries included? | No | | Batteries Required? | No | | Battery Cell Type | Alkaline | ## Product Details - **Brand:** HM Digital - **Special feature:** ATC, Auto Off, High Accuracy, Hold Function - **Age range (description):** Adult - **Included components:** 2 x 1.5V button cell batteries (LR44) - **Outer material:** Plastic - **Display type:** LCD - **Product care instructions:** Wipe Clean - **Unit count:** 1 count - **Power source:** Battery Powered - **Model name:** TDS-4 ## Images ![TDS-4 Pocket Size TDS Meter - Image 1](https://m.media-amazon.com/images/I/51bKRGo1LXL.jpg) ## Questions & Answers **Q: Does this test for safe drinking water ?** A: This is a TDS meter this measure the electrical conductivity of the water. The higher the level of dissolved minerals in the water, the higher the reading it will provide. A reading of 0 would mean the water does not have any mineral content, a reading of 300 would mean the water has a high mineral content. This meter DOES NOT test for bacteria in the water. IT WILL NOT INDICATE if water is safe to drink, as it does not test for bacteria. If you need any further information call help line at Vyair 01507 524576 where we will try and offer technical support. ## Frequently Bought Together - HM Digital TDS-4 Pocket Size TDS Meter - SaltyShrimp Bee shrimp mineral GH+ - HM Digital 342ppm TDS Calibration Solution (a.k.a Water Testing Solution) 3 fl oz (90 ml) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fr/products/49973872-tds-4-pocket-size-tds-meter](https://www.desertcart.fr/products/49973872-tds-4-pocket-size-tds-meter) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-05-02*