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No, they come pre-calibrated from the factory. Given the sensitivity of the instrument and the process involved its really recommended to not mess with the calibration or your really likely to make it less accurate.
These will use the LR44G battery. Feel free to let us know if you have any further questions!
This meter will read 000 up to 999. Feel free to let us know if you have any further questions!
The TDS-3 Handheld TDS Meter from HM Digital is a useful tool to spot check the TDS of your home water supply or RO/DI unit output. This unit features a digital display, built in thermometer, and comes with a carrying case. As with all HM-Digital products, the TDS-3 comes factory calibrated.
Great product By SomeOldGuy on 8/4/2017SomeOldGuy would recommend this product to a friendI purchased this meter just after moving into our new location. I was curious about the state of our water. Thanks to this meter I now know.
It's amazing easy to use, turn it on, put it into a container of water and I have my answer.
If you need/want to know how much TDS (Total Dissolved Solids) are in your water, this is a great way to find out.
Very easy to use By Reefer250 on 1/19/2017Reefer250 would recommend this product to a friendVery easy to use has a nice bag to put it away
Not Accurate By Aaron on 4/13/2016Aaron wouldn't recommend this product to a friendI purchased this to verify my inline TDS meter was working properly. When I got it they were both off by 10 PPM. This was HMs response when asked about it: These meters are accurate within 2%, but have a range of 500ppm TDS, meaning 10ppm TDS is within that range of error. The product is not as accurate as hobbyists are looking for.
Great By Fred on 3/13/2016Fred would recommend this product to a friendWas curious if my Ro di was doing good and I bought this. Happy I did. Easy to use.
Works! By Paperpimp on 3/7/2016Paperpimp would recommend this product to a friendThis meter works good for me! easy to use and seems well built!
working good By siknd on 2/6/2016siknd would recommend this product to a friendHave had this product for a few months now its been working great bought it to show friends and family the total dissolved solids in their drinking water and tap water also used it to double check my RO system make sure that the TDS from the meter on my ro system and from my handheld probe are the same. I have also use the temperature gauge on the hand held TDS meter to double check my temperatures from my tank probes and it has read within .1° of the two probes on the tank
Mine was defective By Yak on 11/23/2015Yak wouldn't recommend this product to a friendI read all the great reviews on tihs product, tried it out, and it was just...not...accurate. Like my local LFS was reading 90 PPM. BRS was great to deal with though, gave me a full refund on the product. They must know a few go out defective.
Works great By Ray on 11/10/2015Ray would recommend this product to a friendproduct as ordered and works great.
Great and accurate. Must own By Walter on 9/5/2015Walter would recommend this product to a friendWas never sure what my home, fridge, ro drinking, or what my finished product water tds was. I was testing everything like crazy when I received this. Is very accurate with my finished product water at zero tds. Now I carry it with me everywhere due to my scientific curiosities. Thank you brs for another great product.
EASY AND WORTHWHILE By Claude on 12/15/2014Claude would recommend this product to a friendEasy to use, accurate, must have.
works great By Mike on 10/29/2014Mike would recommend this product to a friendDoes great, accurate!
not accurate By toms on 9/8/2014toms wouldn't recommend this product to a friendGot tds meter to compare to one on my new brs 4 stage plus ro unit. Hand held not accurate at all. It read 68ppm on the filtered water and 75 on water supply in. I tested on local fish stores RO unit and same readings. I would not buy this tds meter