Milwaukee Instruments MW600 Economy portable D.O. meter

Portable dissolved oxygen DO meter for educational, aquaculture, water analysis, and environmental analysis applications Two-point manual calibration, automatic temperature compensation from 0 to 30C LCD screen Polarographic probe with 3m cable and screw-on cap membraneYou may also like Bell & Gossett Aquastat, 3/4 in Pipe Size 113224.