Does this TDS compensate for differences in temperature like the HM Digital TDS-4?

Yes if it was a real HM TDS meter but it is not. It's a knock off. Go to manufacturer's webpage and find a dealer in your area and order it there if you want a real meter. I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT. The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate. The knock-off simply has a hole and no printed words about calibration on it. The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not. Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM.

Where is this item made?

This is a a knock-off. I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT. The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate. The knock-off simply has a hole and no printed words about calibration on it. The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not. Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM.

Does this teat for lead , mercury, cadmium and other metals? If so, does it tell you concentrations?

No, it does not test for any specific dissolved solid. It tells you the purity of the water only. In other words, how close is the water sample is to distilled water.

The one I bought seems to work however it has no way to adjust it there is a hole in the back but no screw is it a imposter?

That's because it's a knock-off. I spoke to the manufacturer HM DIGITAL today and they said the photo of this product is an original, but the product they ship is NOT. The original real HM Digital TDS-3 have a printed instruction in black letters on the back of the meter that says "CALIBRATION" and has a screw to calibrate. The knock-off simply has a hole and no printed words about calibration on it. The original also has 5 bumps on each edge of the meter like the photo, but the one this seller ships does not. Lastly, the real HM TDS-3 will display "HM" on the screen when you turn it on and then will display 00, but when you first turn it on will display HM.

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

TRUSTED BY INDUSTRY PROS - Powered by advanced microprocessor technology, ensuring reliable results every time.
RUGGED READY FOR ACTION - Includes a durable carrying case with belt clip—perfect for on-the-go commercial use.
PRECISION AT YOUR FINGERTIPS - Instantly measure water purity with 1 ppm resolution for professional-grade accuracy.
ALL IN ONE WATER QUALITY TOOL - Combines TDS measurement and temperature readout on a large, easy-to-read LCD screen.
SAVE REVIEW WITH HOLD FUNCTION - Freeze readings for effortless recording and data tracking in any environment.

The HM Digital TDS-3 is a handheld Total Dissolved Solids meter designed for precise water quality testing with a 0-9990 ppm range and ±2% accuracy. Featuring a built-in digital thermometer and a large LCD display, it offers instant, reliable readings. Its rugged design includes a protective carrying case with belt clip, making it ideal for commercial, industrial, and professional use in water filtration, hydroponics, aquariums, and more.

Specificaties

Manufacturer	HM Digital
Part number	TDS-3
Item Weight	0.2 g
Product Dimensions	15.24 x 3.81 x 2.54 cm; 0.2 g
Batteries	2 LR44 batteries required. (included)
Item model number	TDS-3
Size	0 - 9990 ppm. TDS Range, 1 ppm Resolution, +/- 3% Readout Accuracy
Color	Style 1
Style	Contemporary
Material	plastic
Pattern	meter
Power source type	Battery Powered
Item Package Quantity	1
Number Of Pieces	10
Temperature Range	0/80 Degrees Celsius
Display Style	Digital
Specification met	See Manual
Special Features	Advanced Microprocessor Technology, High Accuracy
Included components	Carrying case
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline

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