HM Digital Pocket-Sized TDS Meter w/ Thermometer

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HB00045

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HM Digital, Inc.

Pocket Sized TDS Meter w/ digital thermometer in aquarium-specific packaging.

The world’s smallest and lightest TDS meter also comes with a built-in digital thermometer. It is a true pocket size meter, comfortably fitting into a shirt pocket without adding bulk. The TDS-4TM-A comes in an aquarium-specific retail-ready packaging.

Features

  • Includes an internal digital thermometer (celsius).
  • The smallest and lightest TDS meter available on the market.
  • Hold Function - Saves measurements for convenient reading and recording.
  • Auto-off function - Turns off meter after 10 minutes of non-use to conserve batteries.
  • Dual Range - Measures from 0 - 999 ppm, with a resolution of 1ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image.
  • Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.
  • Recommended for aquariums & aquaculture


Product Manuals & Documentation

HM Digital Pocket-Sized TDS Meter w/ Thermometer

Owner's Manual available for download in Adobe PDF file format

HM Digital Pocket-Sized TDS Meter w/ Thermometer

Additional Info 1 available for download in Adobe PDF file format

Manufacturer Info

HM Digital, Inc.
Established in 1987, HM Digital, Inc. (formerly known as Heemang Electronics) is an original equipment manufacturer (OEM) that has been recognized worldwide for providing the best values in water testing instrumentation, especially the increasingly popular TDS meter.

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15 Reviewers (93%) would recommend this

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“Does the job”
4.0

Not much to review four stars out of five just because it Celsius not Fahrenheit be nice if you could switch back-and-forth will besides that works as well is it supposed to come calibrated one day delivery as usual as well good product.

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“Accurate”
5.0

I tested this device against 2 other borrowed devices and it is precise. I wish the display screen was a bit bigger, but this is not a show stopper.

  • 1
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“TDS Meter”
4.0

I wish that it read Fahrenheit , I do not like having to do the math .

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“Temp is Celsius ONLY”
5.0

The unit only reads temp. in Celsius not Fahrenheit. Not a big deal for me but can be for others. Apart from that, scary when you test your "filtered" drinking water vs. RO/DI Water.

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“Quality and Precision”
5.0

Just started testing my RO/DI water and will tell me exact ppm. Very well built piece and will last! If you want to make sure your RO/DI system is doing its job, get this TDS Meter!

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“Pre-Calibrated, Great Meter”
5.0

Giving this one 4.5 stars only because the cap is a bit loose. It has a clip on it if you wanted to carry it around, but it would fall off very easily. The meter comes pre-calibrated and works right out of the package. Reads TDS almost instantly and seems to be very accurate. Can't beat it for t...Read More

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“Must Have!”
4.0

Very handy meter. Alerted me the first day to a potential problem with my top off water. I checked the source (city tap) water against my RO and then my RO/DI. My RO/DI was zero but the water in the bottom of my top off reservoir was way high. Now I've covered my reservoir and the levels back down t...Read More

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