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

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€ 30.49

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Know your water, own your wellness.

SMART AUTO OFF - Energy-saving auto-shutdown after 10 minutes keeps your meter ready when you need it.
DURABLE STYLISH - Translucent purple housing combines rugged durability with a sleek, modern look that stands out.
LONG LASTING POWER - Up to 1000 hours of continuous use with included LR44 batteries—reliability that won’t quit.
USER FRIENDLY DESIGN - Large, easy-to-read LCD and hold function let you capture and review measurements effortlessly.
PRECISION AT YOUR FINGERTIPS - Instantly measure water purity with 1 ppm resolution for ultra-accurate readings.

The HM Digital TDS-EZ is a compact, highly accurate water quality tester measuring Total Dissolved Solids from 0 to 9990 ppm with 1 ppm resolution. Featuring a large LCD, hold function, and energy-saving auto-off, it offers up to 1000 hours of battery life powered by included LR44 batteries. Its durable translucent purple casing and easy recalibration make it the go-to tool for professionals and enthusiasts monitoring water purity in filtration, hydroponics, aquariums, and more.

Specifications

ASIN	B002C0A7ZY
Brand Name	HM Digital
Capacity	9999 Picoliters
Color	Purple
Customer Reviews	4.5 4.5 out of 5 stars (7,605)
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
Size	0-9990 ppm. Measurement Range
UPC	712641079917 891144000168
Unit Count	1.0 Count

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