How many times can the tester be used?

FROM HM DIGITAL: Unlimited. Eventually, you will need new batteries, but the TDS-EZ can be used an unlimited number of times.

What temperature was this device calibrated at? I noticed that readings vary with temperature. How do I get a consistent reading?

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.

can the battery be replaced? if so, what battery does it take?

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.

Can this be used to check for collodial silver in the 10 ppm range in a solution of distilled water?

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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

HM Digital blue 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy, TDS-EZ Water Quality TDS Tester, TDS-EZ

Product ID: 249196335

Details

Brand
HM Digital
Capacity
9999
Colour
blue
Item dimensions L x W x H
25 x 32 x 155
Material
Plastic

📊3% readout accuracy

📏0-9990 ppm range

🔋1000 hrs battery life

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

₹ 3685

Duties & taxes included

In stock

Sold byAmazon IndiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to India.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Description

💧 Measure purity, master quality — don’t let your water’s secrets slip away!

SMART AUTO OFF - Energy-saving auto-shutdown after 10 minutes keeps your meter ready when you need it most.
DURABLE STYLISH - Translucent blue, rugged housing built to withstand daily use while looking sleek on your desk.
LONG LASTING POWER - Up to 1000 hours of continuous use with included LR44 batteries—stay powered without interruption.
USER FRIENDLY DESIGN - Large, easy-to-read LCD and hold function for effortless measurement recording on the go.
PRECISION AT YOUR FINGERTIPS - High-resolution 1 ppm increments up to 999 ppm for ultra-accurate water quality insights.

The HM Digital TDS-EZ is a compact, reliable water quality tester offering a broad 0-9990 ppm measurement range with 1 ppm resolution and 3% accuracy. Featuring a large LCD, hold function, and energy-efficient auto-off, it delivers precise readings for tap water, filtration systems, hydroponics, and more. Powered by included LR44 batteries with up to 1000 hours of use, its durable translucent blue casing combines style with practicality for professionals who demand trustworthy water insights anytime, anywhere.

Specifications

ASIN	B002C0A7ZY
ASIN	B002C0A7ZY
Batteries	2 LR44 batteries required. (included)
Brand Name	HM Digital
Capacity	9999 Picoliters
Color	blue
Customer Reviews	4.4 4.4 out of 5 stars (7,369)
Customer reviews	4.4 4.4 out of 5 stars (7,369)
Date First Available	7 August 2012
Global Trade Identification Number	00891144000168
Included Components	meter
Is Discontinued By Manufacturer	No
Item Dimensions	25 x 32 x 155 millimeters
Item Type Name	meter
Item model number	TDS-EZ
Manufacturer	HM Digital, Inc.
Manufacturer	HM Digital, Inc.
Manufacturer Part Number	TDS-EZ
Material Type	Plastic
Model Number	TDS-EZ
Product Dimensions	2.54 x 3.18 x 15.49 cm; 41 g
Size	0-9990 ppm. Measurement Range
UPC	712641079917 891144000168
Unit Count	1 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced from reputable international marketplaces in US, UK, and UAE. We have a robust verification process to ensure product authenticity, and each item is inspected at our warehouse before shipping to customers. Every product comes with applicable warranties and our standard return policy for your peace of mind.

How long does delivery take to India and is it reliable?+

We typically deliver within 4-9 business days to major Indian cities. Each order is trackable end-to-end through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

Why are prices different from Amazon prices?+

All products are sourced from US, UK, and UAE. Our prices include international shipping costs, customs duties, payment processing fees and logistics handling to ensure smooth delivery to India. We handle all customs clearance so you don't face any hidden charges later.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.