---
product_id: 249196335
title: "HM Digital blue 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy, TDS-EZ Water Quality TDS Tester, TDS-EZ"
brand: "hm digital"
price: "C$1812"
currency: NIO
in_stock: true
reviews_count: 8
category: "Hm Digital"
url: https://www.desertcart.ni/products/249196335-hm-digital-blue-0-9990-ppm-measurement-range-1-ppm
store_origin: NI
region: Nicaragua
---

# 0-9990 ppm range 3% readout accuracy 1000 hrs battery life HM Digital blue 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy, TDS-EZ Water Quality TDS Tester, TDS-EZ

**Brand:** hm digital
**Price:** C$1812
**Availability:** ✅ In Stock

## Summary

> 💧 Measure purity, master quality — don’t just test water, own it!

## Quick Answers

- **What is this?** HM Digital blue 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy, TDS-EZ Water Quality TDS Tester, TDS-EZ by hm digital
- **How much does it cost?** C$1812 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/249196335-hm-digital-blue-0-9990-ppm-measurement-range-1-ppm)

## 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

- • **Calibrate Like a Pro:** Factory calibrated with 342 ppm NaCl solution and easily recalibrated with a mini screwdriver for trusted accuracy.
- • **Endurance That Lasts:** Up to 1000 hours of continuous use powered by included button cell batteries—no downtime, no hassle.
- • **User-Friendly Design:** Large, easy-to-read LCD screen paired with a durable, translucent blue housing that stands out.
- • **Smart Power Management:** Auto-off after 10 minutes conserves battery life, keeping your device ready when you are.
- • **Precision at Your Fingertips:** Ultra-wide 0-9990 ppm range with 1 ppm resolution for pinpoint water quality insights.

## Overview

The HM Digital TDS-EZ is a sleek, durable water quality tester offering a broad 0-9990 ppm measurement range with 1 ppm resolution and 3% accuracy. Designed for professionals and enthusiasts alike, it features a large LCD, auto-off power saving, and a long-lasting battery life of approximately 1000 hours. Factory calibrated and user recalibratable, this compact, translucent blue device is perfect for monitoring tap water, filtration systems, hydroponics, aquariums, and more—ensuring you never compromise on water purity.

## 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-EZ 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-EZ 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-EZ is a great tool for drinking water, water filtration and purification, hydroponics (test your nutrients), aquariums, RO/DI systems, pools and spas, and more.

Review: ممتاز - ممتاز الجهاز ويقس نقاوة الماء صح 👌🏽
Review: Very high quality! - Tested this straight from the package inside a 342ppm fluid solution,and got it right straightaway without any calibration.Also it has the ability to calibrate using a screw driver,unlike many other tds pen out there.

## Features

- Economy model that is ideal for end-users. Highly efficient and accurate due to its advanced microprocessor technology.
- Hold Function: saves measurements for convenient reading and recording and battery life is approx. 1000 hours of usage and power source is 2 x 1.5V button cell batteries (included) (LR44 or equivalent)
- Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries. Display: large and easy-to-read LCD screen.
- 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. Fun, translucent blue housing that's very strong and durable.
- TDS-EZ meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. Includes a TDS chart sticker on the back of the meter that explains TDS values.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002C0A7ZY |
| Brand | HM Digital |
| Brand Name | HM Digital |
| Capacity | 9999 Picoliters |
| Color | blue |
| Colour | blue |
| Country of Publication | China |
| Customer Reviews | 4.4 out of 5 stars 7,343 Reviews |
| Global Trade Identification Number | 00891144000168 |
| Included Components | meter |
| Item Dimensions | 25 x 32 x 155 millimeters |
| Item Type Name | meter |
| Item Weight | 2 Ounces |
| Item dimensions L x W x H | 25 x 32 x 155 millimeters |
| Item height | 6.1 inches |
| Item weight | 2 Ounces |
| Manufacturer | HM Digital, Inc. |
| Material | Plastic |
| Material Type | Plastic |
| UPC | 712641079917 891144000168 |
| Unit Count | 1 Count |

## Product Details

- **Colour:** blue
- **Material:** Plastic
- **Capacity:** 9999 Picoliters
- **Brand:** HM Digital
- **Item dimensions L x W x H:** 25 x 32 x 155 millimeters

## Images

![HM Digital blue 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy, TDS-EZ Water Quality TDS Tester, TDS-EZ - Image 1](https://m.media-amazon.com/images/I/51bkCzLQm9L.jpg)

## Questions & Answers

**Q: How many times can the tester be used?**
A: FROM HM DIGITAL: Unlimited.  Eventually, you will need new batteries, but the TDS-EZ can be used an unlimited number of times.

**Q: What temperature was this device calibrated at? I noticed that readings vary with temperature. How do I get a consistent reading?**
A: FROM HM DIGITAL: The TDS-EZ was calibrated at 25 degrees Celsius (77F), but more importantly, the TDS-EZ is one of HM Digital's most basic meters and does not have Automatic Temperature Compensation (ATC).  Therefore, since it does not have ATC, you will see discrepancies when testing hotter or colder from the baseline of 25C/77F.If your water is typically around this temperature, it won't be much of a difference, but if +/-10 degrees or more from 25C/77F, it's a good idea to get a meter with ATC, such as HM Digital's TDS-3, TDS-4, AP-1, COM-80 or COM-100.

**Q: can the battery be replaced? if so, what battery does it take?**
A: Yes, the batteries can be replaced. It takes 2 LR44G "button cell" batteries like the batteries that go in watches, ect. The unit has an auto shut-off so the batteries should last a good long time.

**Q: Can this be used to check for collodial silver in the 10 ppm range in a solution of distilled water?**
A: No it can't.  It doesn't detect specific elements or chemicals.  Though the way calcium, lead, and collodial silver may dissolve would effect the numerical value of TDS and if you knew that in 100 ml of 45 deg Celsius water would only hold X# ppm of an element you might be able to figure it out based on the numerical value shown.

## Customer Reviews

### ⭐⭐⭐⭐⭐ ممتاز
*by ر***ة on 6 April 2024*

ممتاز الجهاز ويقس نقاوة الماء صح 👌🏽

### ⭐⭐⭐⭐⭐ Very high quality!
*by A***I on 7 August 2020*

Tested this straight from the package inside a 342ppm fluid solution,and got it right straightaway without any calibration.Also it has the ability to calibrate using a screw driver,unlike many other tds pen out there.

### ⭐⭐⭐⭐ good one
*by A***F on 12 June 2021*

very useful to detect purity of water

## Frequently Bought Together

- HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy,Purple
- 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 Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-10*