Obviously for "aquaristic rough determination" just right!

1. First things first:
The device displays the measured values ​​as a particle of, unit "ppm" (parts per million "), and this statement I find much more practical than the conductivity of the water, which in" s / cm "(micro Siemens per centimeter) is given! (Both you can convert into each other.) The conductivity of the water itself is the hobby basically yes irrelevant (no one wants to electronics in the water sink), but it comes down to the "in water dissolved substances", so the burden of water with solutes . And the can with the unit ppm (parts per million) to German "parts per million", are displayed very sensible.
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2. Test measurements:
I have long wondered whether a conductivity meter for a paltry 17, - can suck what. I decided to try it and have found that it the device can obviously!

I have not (yet) calibration solution! Maybe I put over here with H2O dist., Calcium carbonate and fine balance which order or what. My preliminary tests are quite pragmatic:

a) distilled H2O .: 2ppm (exactly as in a other reviewers here)
Very plausible! In distilled water only a little atmospheric CO2 is dissolved. These tracks are almost always least in H2O. available! The value "0 ppm" would therefore naturally not real (too low). 2ppm however, sound very plausible for traces of dissolved carbon dioxide.

b) tap water: approx 244ppm
Also plausible in our hardness (measured drops) of 15. Exactly 15 ° dH would be 267ppm, according to conversion. 244ppm correspond to a hardness of 13.6 ° dH.
ATTENTION! Published by the Waterworks drinking water analysis from 2012 is the water here but with an average of 13.4 ° dH total hardness on. If we assume that this is true (which can be assumed in a laboratory analysis well) and is mistaken the drop test (the drops are in the size not "standardized", but covered with "about the same size" down), then the conductivity meter closely!

c) Diverse small 1L-water bucket, the standing around for certain aquaritsische plant trials have long with me, all with verschienenen Eindampfungsgrad - is the more water evaporates, the higher ppm value is displayed.
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3. Temperature measurement:
The device displays the temperature with a resolution of 1 Kelvin. Which is the difference of one degree Celsius. It takes a while until the temperature display has come to rest and not be changed, then the device displays but (compared with two calibrated JBL aquarium thermometers) the temperature with "0.5-1 Kelvin too little" sufficiently precise (ie, if the temperature in the test vessel sank, the meter significantly fell rather to the next lower temperature value than the reference thermometer). From this one may well also include a sufficiently accurate temperature compensation in the ppm measurement.
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4. Auto Power Off:
Very important! The unit turns itself off reliably after about 10min! So you will not run the risk of being empty batteries.
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5. Conclusion:
Exactly how the device is numerically really, one could only conclude with calibration solutions. But the measured values ​​of my votes in proportion all! And they are reproducible! The device displays in the same water to a leveling out of 30s always the same values. And most importantly, is also least. Water obviously measured correctly.

Therefore, I come to the conclusion that the device for "aquarium ratio estimate" is very appropriate. It's all in the hunting and not to determine the water values ​​to 5ppm exactly, but rather to determine how strong the ppm value has increased since the last water change or how much the hardness goes back through the peat or to check whether the ion exchangers are regenerated needs. Once done, the device obviously good. In 95% of cases you want the measurement yes not measure the conductance numerically concrete, but check and find only one changes in the conductance.

For "a paltry 17, - Euro" a pleasingly inexpensive affair!
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