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

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

📏0-9990 ppm range

🔍1 ppm resolution precision

⏱️Auto-off after 10 min

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

B/.84

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered 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 Panama.

Secure transaction

Description

💧 Measure purity, master your water game!

SMART AUTO OFF - Conserves energy by shutting off after 10 minutes of inactivity—efficiency meets convenience.
DURABLE STYLISH - Translucent blue housing combines rugged durability with a sleek, modern look.
EXTENDED BATTERY LIFE - Up to 1000 hours of continuous use with included LR44 batteries—stay powered longer.
PRECISION AT YOUR FINGERTIPS - Ultra-clear 1 ppm resolution ensures you never miss a detail in water purity.
INSTANT WATER QUALITY INSIGHT - Large LCD display and hold function let you capture and review readings effortlessly.

The TDS-EZ is a compact, highly accurate water quality tester with a broad 0-9990 ppm measurement range and 1 ppm resolution. Featuring advanced microprocessor technology, a large LCD screen, and energy-saving auto-off, it’s perfect for professionals and enthusiasts monitoring water purity in filtration, hydroponics, aquariums, and more. Its durable translucent blue design and long battery life make it a reliable, stylish tool for anyone serious about water quality.

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 directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable 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.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

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

3 weeks ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week 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.