---
product_id: 3067453
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: "HK$216"
currency: HKD
in_stock: true
category: "Hm Digital"
url: https://www.desertcart.hk/products/3067453-hm-digital-tds-3-handheld-tds-meter-with-carrying-case
store_origin: HK
region: Hong Kong
---

# Auto-off after 10 min ±2% accuracy 0-9990 ppm range 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:** HK$216
**Availability:** ✅ In Stock

## Summary

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

## 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?** HK$216 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/3067453-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

- • **Portable & Protective:** Includes a rugged carrying case with belt clip for on-the-go convenience and durability.
- • **Smart Power Management:** Auto-off feature conserves battery life, keeping you ready for every test.
- • **Data Hold Functionality:** Save and review measurements effortlessly, ensuring no detail is missed during your analysis.
- • **Multi-Use Water Quality Tool:** Perfect for tap water, filtration systems, hydroponics, aquariums, and more—be the water quality expert in your circle.
- • **Precision at Your Fingertips:** Instantly measure water purity with 1 ppm resolution for professional-grade accuracy.

## 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. Designed for commercial and professional use, it features advanced microprocessor technology, a built-in digital thermometer, data hold, and an auto-off function to extend battery life. Packaged with a durable carrying case and belt clip, it’s the go-to tool for instant, reliable water quality testing across multiple applications.

## Description

Product 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. From the Manufacturer Ideal for commercial use.

## Features

- plastic
- Imported
- 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
- Built-in digital thermometer

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000VTQM70 |
| Additional Features | High Accuracy |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Battery Life | 3 Hours |
| Best Sellers Rank | #3,012 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Conductivity Meters & Accessories |
| Brand | HM Digital |
| Brand Name | HM Digital |
| Color | Style 1 |
| Customer Reviews | 4.6 out of 5 stars 1,816 Reviews |
| Display Type | LCD |
| Global Trade Identification Number | 00826333000001 |
| Included Components | Storage Case |
| Indoor Outdoor Usage | Indoor |
| Item Length | 1 Inches |
| Item Weight | 0.2 Grams |
| Manufacturer | HM Digital |
| Model | TDS-3 |
| Model Name | TDS-3 |
| Number of Batteries | 2 LR44 batteries required. (included) |
| Outer Material | Metal |
| Part Number | TDS-3 |
| Power Source | Battery Powered |
| Product Care Instructions | Wipe Clean |
| Resolution | 1 ppm |
| Reusability | Single Use |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | High Accuracy |
| Style Name | Contemporary |
| UPC | 891144000083 826333000001 |
| Unit Count | 1.0 Count |
| Upper Temperature Range | 50 Degrees Celsius |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** HM Digital
- **Color:** Style 1
- **Display Type:** LCD
- **Included Components:** Storage Case
- **Outer Material:** Metal
- **Power Source:** Battery Powered
- **Product Care Instructions:** Wipe Clean
- **Special Feature:** High Accuracy
- **Unit Count:** 1.0 Count

## 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)
![HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy - Image 2](https://m.media-amazon.com/images/I/61HMBs6FSjL.jpg)
![HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy - Image 3](https://m.media-amazon.com/images/I/61u+PIX2faL.jpg)
![HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy - Image 4](https://m.media-amazon.com/images/I/61HLc3eAlpL.jpg)
![HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy - 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.

## Frequently Bought Together

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-07-15*