MW302 LED Economy Portable Conductivity EC Meter with 1 Point Manual Calibration, 0 to 10.00 milliSiemens/cm, 0.1 milliSiemens/cm Resolution, 2 percent Accuracy

Works great!

product did not work. Myself, as well as many others tried calibrating it, and still didn’t work.

Very good build quality, range, resolution and accuracy. Being factory calibrated, I still perform a cal check routinely and find it dead-on accurate for 222mV standard.The display is large, clear and easy to read.Regarding another reviewer who marked the meter down due to salt residue on the probe - that salt is Potassium Chloride, which is the storage solution for the probe. As KCl dries out, it becomes a white salt. Simply rinse with water to remove.

The meter works fine. I've checked different fluids and I'm getting positive and negative readings. I used alkaline water to test for the negative readings. One reading was -599. The meter comes with a bottle of storage fluid, but I brought more as well. It comes with the probe, but it's not shown in the picture. It comes with a 9 volt battery too.

Hi received this item today and it have this white residue on the probe! Is this worth it keep? or needs replacing as it would affects device life span? any help is appreciated thank you

I spoke with the service department when I first got my device because it was not working. They told me to store the probe in the oxidized water(acidic water) and from then that is what I have been doing. Still it does not work and it stays at the same reading and barely fluctuates at all. The problem is not the probe and it is not the water I am putting it into. Kangen water has a negative ORP, it has been tested many times with other devices. I do not recommend this product AT ALL, it is not consistent therefore if you do presentations it could possibly show an inaccurate reading making you look like a fraud. I am only putting 1 star for this review because I have no choice. Do not buy this!!!

Great product was ready to use right out of the box. Even came with a battery.

"The MA9025 ORP Probe Oxidation Kit is needed for MW500 ORP meter for fast and more accurate negative ORP readings."I expected the priming solution to be either with the meter or at least mention of the need to order it separately since you do not include it. Nor did you include an operating manual with your distribution of this product. You cannot expect all purchasers to download manuals regardless of their ability to order online. Luckily I was anticipating the priming solution with my order otherwise I would have been ignorant of needing it and disappointed with the performance of my Milwaukee OPR Meter. Now I'm delayed in using my ORP Meter because of sloppy sales management. Hopefully I purchased equipment that isn't defective. I won't know until it's primed.