--- product_id: 264617149 title: "HM Digital - HMDAP1 AP-1 AquaPro Water Quality Total Dissolved Solids r, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy (Magnetic Body)" brand: "hm digital" price: "€ 46.53" currency: EUR in_stock: true reviews_count: 5 category: "Hm Digital" url: https://www.desertcart.it/products/264617149-hm-digital-hmdap1-ap-1-aquapro-water-quality-total-dissolved store_origin: IT region: Italy --- # 0-5000 ppm TDS range Magnetic body for fridge storage 500 ms fast response HM Digital - HMDAP1 AP-1 AquaPro Water Quality Total Dissolved Solids r, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy (Magnetic Body) **Brand:** hm digital **Price:** € 46.53 **Availability:** ✅ In Stock ## Summary > 💧 Know your water, own your health — precision meets convenience! ## Quick Answers - **What is this?** HM Digital - HMDAP1 AP-1 AquaPro Water Quality Total Dissolved Solids r, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy (Magnetic Body) by hm digital - **How much does it cost?** € 46.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/264617149-hm-digital-hmdap1-ap-1-aquapro-water-quality-total-dissolved) ## 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 - • **Sleek Magnetic Design:** Store your meter effortlessly on any magnetic surface—perfect for modern kitchens and busy professionals. - • **Instant Water Purity Check:** Get real-time TDS readings with 1 ppm precision to know exactly what’s in your water. - • **Water-Resistant Durability:** Built to withstand splashes and spills, so you can test confidently anywhere indoors. - • **One-Button Digital Calibration:** Easily maintain accuracy with push-button calibration—no tech degree required. - • **Smart Temperature Compensation:** Automatic Temperature Compensation (ATC) ensures accurate results regardless of water temperature. ## Overview The HM Digital AquaPro AP-1 is a sleek, magnetic-bodied TDS meter designed for professionals and health-conscious millennials. It measures total dissolved solids in water with a wide 0-5000 ppm range and 1 ppm resolution, delivering fast, accurate readings within 500 milliseconds. Featuring automatic temperature compensation and water-resistant housing, it’s perfect for monitoring tap water, filtration systems, aquariums, and more. Its magnetic design allows easy storage on your fridge, blending seamlessly into your modern lifestyle. ## Description Product Description: How Pure is Your Water? A TDS meter (aka ppm pen, 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 AP-1 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 AP-1 is great for checking your tap water quality, or knowing when to change a filter. (The meter does not test for biological contaminants.) The AP-1 is a great tool for drinking water, water filtration and purification, hydroponics (test your nutrients), colloidal silver, aquariums, RO/DI systems, pools and spas, and more. HM Digital's AquaPro digital water r has a sleek design that's perfect for today's modern kitchen. The AquaPro digital water rs are the next generation for today's tech-savvy and health-conscience consumer. Temperature Range: 0-80 C; 32-176 F Review: Buen medidor tds teniendo en cuenta su bajo precio. Una lastima que las instrucciones vengan en inglés. No hay instrucciones en español. Review: Alles o.k. gerne wieder ## Features - Measures total dissolved solids (TDS) and temperature - Automatic Temperature Compensation (ATC) - Water-resistant housing - Digital Calibration (push button) - Magnetic body - store the meter on your fridge when not in use! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B007KDYOMU | | Item model number | HMDAP1 | | Manufacturer | HM Digital | | Product Dimensions | 14.99 x 1.27 x 2.79 cm; 80 g | ## Product Details - **Age range (description):** Adult - **Brand:** HM Digital - **Included components:** Battery - **Outer material:** Plastic - **Special features:** Digital ## Images ![HM Digital - HMDAP1 AP-1 AquaPro Water Quality Total Dissolved Solids r, 0-5000 ppm TDS Range, 1 ppm Resolution, +/- 2% Readout Accuracy (Magnetic Body) - Image 1](https://m.media-amazon.com/images/I/51w0Cb6+QtL.jpg) ## Questions & Answers **Q: Does anyone have instructions for this tester? I have had mine for two years and can’t find the instructions.** A: Not sure if website links are allowed, but here is the link to the PDF manual. http://hmdigital.com/wp-content/uploads/2016/11/ap1manual.pdf **Q: which conversion factor does this meter use to convert EC to ppm 500 or 700?** A: The website says 0.5 NACL which leads me to believe its 500. I think 700 measures a different solid other than nacl. **Q: can you use this to check colliodal silver ppm???** A: Yes, I use it for that purpose. I really like this tester. It is accurate when compared to another meter I have that has been calibrated for reading silver levels. If you are going to purchase this meter I would suggest adding a TDS Calibration Solution as well. **Q: Does this work for measuring percent of salt in food brine?** A: If the salt is in a fluid suspension yes it can be measured. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by G***R on 2 December 2017* Buen medidor tds teniendo en cuenta su bajo precio. Una lastima que las instrucciones vengan en inglés. No hay instrucciones en español. ### ⭐⭐⭐⭐⭐ Review *by M***A on 24 January 2023* Alles o.k. gerne wieder ### ⭐⭐⭐⭐⭐ Review *by U***R on 17 November 2021* Worked well and accurate... tested against buffered solution!! ## Frequently Bought Together - HM Digital AquaPro Handheld Water Total Dissolved Solids Tester - HM-DIGITAL-AP-1 - Apera Instruments PH20 Value pH Meter, Pocket Tester, Waterproof, ±0.1 pH Accuracy, 0-14 pH Range, ±0.5°C Temperature Sensor, Complete kit - HM Digital PH-80 Digital pH/Temperature Meter --- ## 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.it/products/264617149-hm-digital-hmdap1-ap-1-aquapro-water-quality-total-dissolved](https://www.desertcart.it/products/264617149-hm-digital-hmdap1-ap-1-aquapro-water-quality-total-dissolved) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-10*