Extech CL200 ExStik Waterproof Chlorine Meter

This is a very useful and seemingly accurate unit, but if you haven't done the research it is not clear from the description above that you have to use a reagent tablet for each test (there are only 50 supplied, hence 4/5). You dissolve the tablet in 20ml of test sample, insert the probe, stir and wait for the result. Clean, quick and accurate. A further 1000 reagent tablets costs about £100 from various resellers.

Not accurate readings. Chlorine levels are all over the place

I purchased this to validate my custom built continuous exchange dripping water system for freshwater aquarium. I compared the readings with laboratory class instrument and the reading are very accurate per product specification. This product allows me not only validate the quality of water I use for my aquarium tanks, but also allowed me to realize how over chlorinated tap water is in my community , over 5ppm which is 25% above FDA recommended levels for US. I also can check and validate how household under the sink active carbon based water filter works and even whether bottled water is worth buying. This instruments reduced the risk of chlorine poisoning by making my family aware of what we drink. Highly recommended and easy to use.

Failed after 3 months. Useless support from both Amazon and FLIR (Extech). Shows an error that is not documented in the troubleshooting guide. Cannot find out where to send for repair of replacement.

Serves our purpose and has been working great