---
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: "$35.78"
currency: USD
in_stock: true
category: "Hm Digital"
url: https://www.desertcart.us/products/3067453-hm-digital-tds-3-handheld-tds-meter-with-carrying-case
store_origin: US
region: United States of America
---

# ±2% accuracy 0-9990 ppm range Auto-off battery saver 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:** $35.78
**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?** $35.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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

- • **Dual-Function Display:** Built-in digital thermometer complements TDS readings for comprehensive water analysis.
- • **Smart Power Management:** Auto-off after 10 minutes conserves battery life, keeping your device ready when you need it.
- • **Portable & Professional:** Compact handheld design with protective carrying case and belt clip for on-the-go convenience.
- • **Broad Measurement Spectrum:** Covers 0 to 9990 ppm, perfect for everything from tap water to hydroponics and industrial use.
- • **Precision at Your Fingertips:** Instant, highly accurate TDS readings with ±2% accuracy for confident water quality checks.

## Overview

The HM Digital TDS-3 is a top-rated handheld meter designed for professionals and enthusiasts alike, delivering precise Total Dissolved Solids measurements from 0 to 9990 ppm with ±2% accuracy. Featuring advanced microprocessor technology, a built-in thermometer, and an energy-saving auto-off function, it’s ideal for hydroponics, water filtration, aquariums, and industrial applications. Its compact design includes a protective carrying case with belt clip, making it the go-to tool for instant, reliable water quality insights.

## 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 |
| Battery Life | 3 Hours |
| Best Sellers Rank | #3,358 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Conductivity Meters & Accessories |
| Brand Name | HM Digital |
| Color | Style 1 |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,791) |
| Display Type | LCD |
| Global Trade Identification Number | 00826333000001 |
| Included Components | Carrying 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 |
| 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:** Carrying 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)

## 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 United States of America*
*Store origin: US*
*Last updated: 2026-06-21*