---
product_id: 274999055
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: "S$35"
currency: SGD
in_stock: true
reviews_count: 5
category: "Hm Digital"
url: https://www.desertcart.sg/products/274999055-hm-digital-tds-3-handheld-tds-meter-with-carrying-case
store_origin: SG
region: Singapore
---

# ±2% readout accuracy 0-9990 ppm TDS range Built-in digital thermometer 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:** S$35
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead of water quality—because pure water means pure peace of mind!

## 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?** S$35 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/274999055-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

- • **Multi-Use Mastery:** Perfect for water filters, hydroponics, aquariums, pools, and industrial quality checks.
- • **Smart Data Capture:** Hold function saves readings so you never miss a critical measurement.
- • **Next-Level Accuracy:** Advanced microprocessor technology ensures reliable results within ±2%.
- • **Pro-Grade Durability:** Rugged design with included carrying case and belt clip for on-the-go professionals.
- • **Precision at Your Fingertips:** Instantly measure water purity with 1 ppm resolution for confident decisions.

## Overview

The HM Digital TDS-3 is a handheld Total Dissolved Solids meter offering a wide 0-9990 ppm measurement range with 1 ppm resolution and ±2% accuracy. Featuring advanced microprocessor technology and a built-in digital thermometer, it delivers fast, reliable water purity readings on a large LCD screen. Designed for professionals, it includes a rugged carrying case with belt clip and a hold function to save measurements, making it ideal for commercial, industrial, and home water quality monitoring.

## 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: 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

- 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 |
| ASIN  | B000VTQM70 |
| Batteries | 2 LR44 batteries required. (included) |
| Batteries  | 2 LR44 batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Color | Style 1 |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,681) |
| Customer reviews | 4.4 4.4 out of 5 stars (1,681) |
| Date First Available | 7 August 2012 |
| Date First Available  | 7 August 2012 |
| Department  | Fish & Aquatic Pets |
| Display Style | Digital |
| Included components | Carrying case |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 0.2 g |
| Item model number | TDS-3 |
| Item model number  | TDS-3 |
| Manufacturer | HM Digital |
| Manufacturer  | HM Digital |
| Material | plastic |
| Number Of Pieces | 10 |
| Part number | TDS-3 |
| Pattern | meter |
| Power source type | Battery Powered |
| Product Dimensions | 15.24 x 3.81 x 2.54 cm; 0.2 g |
| Product Dimensions  | 15.24 x 3.81 x 2.54 cm; 0.2 g |
| Size | 0 - 9990 ppm. TDS Range, 1 ppm Resolution, +/- 3% Readout Accuracy |
| Special Features | Advanced Microprocessor Technology, High Accuracy |
| Specification met | See Manual |
| Style | Contemporary |
| Temperature Range | 0/80 Degrees Celsius |

## Product Details

- **Age range (description):** Adult
- **Brand:** HM Digital
- **Colour:** Style 1
- **Included components:** Carrying case
- **Special features:** Advanced Microprocessor Technology, High Accuracy

## 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)

## Available Options

This product comes in different **Size** options.

## 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 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.

### ⭐⭐⭐⭐⭐ Review
*by C***L on 21 November 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 9 March 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 Singapore*
*Store origin: SG*
*Last updated: 2026-02-14*