---
product_id: 264617149
title: "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: "341 kr"
currency: DKK
in_stock: true
reviews_count: 5
category: "Hm Digital"
url: https://www.desertcart.dk/products/264617149-hmdap1-ap-1-aquapro-water-quality-total-dissolved-solids-r
store_origin: DK
region: Denmark
---

# 0-5000 ppm TDS range Magnetic body for fridge storage 500 ms fast response 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:** 341 kr
**Availability:** ✅ In Stock

## Summary

> 💧 Know your water, own your health — precision meets convenience!

## Quick Answers

- **What is this?** 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?** 341 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/264617149-hmdap1-ap-1-aquapro-water-quality-total-dissolved-solids-r)

## 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: Gaspar - 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. - 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 |
| Additional Features | Digital |
| Age Range Description | Adult |
| Age range (description) | Adult |
| Brand | HM Digital |
| Brand Name | HM Digital |
| Customer Reviews | 4.2 out of 5 stars 1,632 Reviews |
| Display Type | LCD display |
| Global Trade Identification Number | 00891144000120 |
| Included Components | Battery |
| Included components | Battery |
| Indoor Outdoor Usage | Indoor |
| Inner Material | Magnetic |
| Item Weight | 0.18 Pounds |
| Item height | 1.1 inches |
| Manufacturer | HM Digital |
| Model | HMDAP1 |
| Model Name | HMDAP1 |
| Number of Batteries | 1 Lithium Metal batteries required. |
| Outer Material | Plastic |
| Outer material | Plastic |
| Power Source | Battery Powered |
| Product Care Instructions | Wipe Clean |
| Resolution | 1 ppm |
| Response Time | 500 Milliseconds |
| Reusability | Reusable |
| Special features | Digital |
| Specification Met | TDS |
| Specification met | TDS |
| UPC | 891144000120 807032971472 |
| Unit Count | 1.0 Count |
| Upper Temperature Range | 80 Degrees Celsius |

## Product Details

- **Age range (description):** Adult
- **Brand:** HM Digital
- **Included components:** Battery
- **Outer material:** Plastic
- **Special features:** Digital

## Images

![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

### ⭐⭐⭐⭐⭐ Gaspar
*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.

### ⭐⭐⭐⭐⭐ Alles o.k.
*by M***A on 24 January 2023*

Alles o.k. gerne wieder

### ⭐⭐⭐⭐⭐ Great buy
*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

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-07*