---
product_id: 764689794
title: "HM Digital HM-DIGITAL-TDS-3 HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case"
brand: "hm digital"
price: "€ 48.83"
currency: EUR
in_stock: true
reviews_count: 5
category: "Hm Digital"
url: https://www.desertcart.pt/products/764689794-hm-digital-hm-digital-tds-3-hm-digital-tds-3
store_origin: PT
region: Portugal
---

# 0-9990 PPM range Auto-off after 10 min Built-in digital thermometer HM Digital HM-DIGITAL-TDS-3 HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case

**Brand:** hm digital
**Price:** € 48.83
**Availability:** ✅ In Stock

## Summary

> 💧 Measure purity like a pro — never second-guess your water quality again!

## Quick Answers

- **What is this?** HM Digital HM-DIGITAL-TDS-3 HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case by hm digital
- **How much does it cost?** € 48.83 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/764689794-hm-digital-hm-digital-tds-3-hm-digital-tds-3)

## 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

- • **Instant Data Capture:** Hold function freezes readings for easy recording and analysis anytime, anywhere.
- • **Dual-Function Display:** Large LCD shows both TDS levels and water temperature for comprehensive water quality insights.
- • **Effortless Portability:** Compact handheld design with included carrying case and belt clip for on-the-go testing.
- • **Smart Power Management:** Auto-shutdown after 10 minutes conserves battery life for uninterrupted field use.
- • **Precision that Professionals Trust:** High-accuracy microprocessor ensures reliable TDS readings within ±2%.

## Overview

The HM Digital TDS-3 is a handheld Total Dissolved Solids meter designed for commercial and personal water quality testing. Featuring a wide measurement range up to 9990 PPM, a built-in digital thermometer, and a high-accuracy microprocessor, it delivers precise readings with easy-to-read LCD output. Its portability is enhanced by a carrying case with belt clip, while smart features like auto-off and hold function optimize battery life and usability. Trusted by thousands with a 4.4-star rating, it’s the go-to tool for professionals and water-conscious millennials alike.

## Description

Features Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate due to its advanced microprocessor, technology:. Hold function: Saves measurements for convenient reading and recording. Auto – off function: The meter shuts off automatically after 10 minutes of non use to conserve batteries. Measurement range: 0 – 9990 PPM. From 0 – 999 PPM, the resolution is in increments of 1ppm. From 1000 to 9990 PPM, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image. Built – in digital thermometer Display: Large and easy – to – read LCD screen. Our meters are calibrated with a 342 PPM NaCl solution. meters can be recalibrated with a mini screwdriver.

Review: 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: Usei um medidor e constatei que a água do filtro tem a mesma qualidade da água da torneira, com o mesmo número de resíduos. Tudo foi instalado conforme o manual. O produto me ajudou a ver que fui enganada

## Features

- 高精度

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000VTQM70 |
| Amazon Bestseller | #116,170 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,400 in Voltage Testers |
| Batteries | 2 LR44 batteries required. (included) |
| Batteries Included | Yes |
| Batteries Required? | Yes |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,701) |
| Date First Available | September 15, 2013 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 15.2 x 3.8 x 2.5 cm |
| Item Weight | 0.2 g |
| Number Of Pieces | 10 |
| Part number | TDS-3 |
| Power source type | Battery Powered |
| Product Dimensions | 15.24 x 3.81 x 2.54 cm; 0.2 g |
| Special Features | High Accuracy |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** HM Digital
- **Global Trade Identification Number:** 00826333000001
- **Number of Batteries:** 2 LR44 batteries required. (included)
- **Outer Material:** Plastic
- **Power Source:** Battery Powered
- **Special Feature:** High Accuracy
- **UPC:** 891144000083 826333000001
- **Unit Count:** 1.0 Count

## Images

![HM Digital HM-DIGITAL-TDS-3 HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case - Image 1](https://m.media-amazon.com/images/I/512msUopWxL.jpg)
![HM Digital HM-DIGITAL-TDS-3 HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case - Image 2](https://m.media-amazon.com/images/I/61HMBs6FSjL.jpg)
![HM Digital HM-DIGITAL-TDS-3 HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case - Image 3](https://m.media-amazon.com/images/I/61u+PIX2faL.jpg)
![HM Digital HM-DIGITAL-TDS-3 HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case - Image 4](https://m.media-amazon.com/images/I/61HLc3eAlpL.jpg)
![HM Digital HM-DIGITAL-TDS-3 HM Digital TDS-3 Total Dissolved Solids Handheld Meter with Carrying Case - 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

### ⭐⭐⭐⭐⭐ Review
*by T***K on June 19, 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.

### ⭐⭐⭐⭐⭐ Review
*by C***L on November 21, 2023*

Usei um medidor e constatei que a água do filtro tem a mesma qualidade da água da torneira, com o mesmo número de resíduos. Tudo foi instalado conforme o manual. O produto me ajudou a ver que fui enganada

### ⭐ Review
*by A***A on March 9, 2020*

Purtroppo non ci sono istruzioni in italiano

## 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.

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-21*