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.

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

Product ID: 1092617

Details

Brand
HM Digital
Capacity
9999
Color
Purple
Item dimensions L x W x H
1 x 1.25 x 6.1
Material
Plastic

📏0-9990 ppm range

📟1 ppm resolution

🔋1000 hrs battery life

€ 31.75

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay ahead of water quality—because pure is the new power move!

DURABLE STYLISH - Robust translucent purple housing that stands out on your desk or in the field.
LONG LASTING POWER - Up to 1000 hours of use with included LR44 batteries and smart auto-off to save energy.
USER FRIENDLY DESIGN - Large, easy-to-read LCD screen with hold function to freeze readings for effortless recording.
VERSATILE WATER TESTING - Ideal for tap water, filtration systems, hydroponics, aquariums, pools, and more—know your water’s purity instantly.
PRECISION AT YOUR FINGERTIPS - Accurate TDS readings with 1 ppm resolution and 3% accuracy for confident water quality checks.

The HM Digital TDS-EZ is a compact, economy-grade water quality tester offering a wide 0-9990 ppm measurement range with 1 ppm resolution and 3% accuracy. Featuring a large LCD, hold function, and auto-off for battery conservation, it runs on two LR44 batteries (included) with approximately 1000 hours of use. Its durable translucent purple casing and easy recalibration make it perfect for professionals monitoring water purity in filtration, hydroponics, aquariums, and more.

Specifications

ASIN	B002C0A7ZY
Brand Name	HM Digital
Capacity	9999 picoliters
Color	Purple
Customer Reviews	4.4 4.4 out of 5 stars (7,618)
Global Trade Identification Number	00891144000168
Included Components	meter
Item Dimensions	1 x 1.25 x 6.1 inches
Item Type Name	meter
Manufacturer	HM Digital, Inc.
Manufacturer Part Number	TDS-EZ
Material Type	Plastic
Model Number	TDS-EZ
Number of Items	1
Size	0-9990 ppm. Measurement Range
UPC	712641079917 891144000168
Unit Count	1 Count

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€ 31.75

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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