These water testers do a variety of tasks. Make sure you choose the right combo meter for your application. Our best selling TDS Meters are the MW802 and MW801. We also have lab grade units available as well for more precision water testing in many applications including instructions on how to measure Kangen ORP water testing and aquariums.
The Milwaukee Instruments MW500 with SE300 with BNC Probe along with the MW101, MW100 or MW102 all are great additions.
Note: We ship to the USA and Canada only.