HP indigo conductivity/density (CDM) meter and a stand alone conductivity meter

Description

For sale is a combo HP digital Conductivity /Density (CDM) meter and a stand alone conductivity meter
the digital meter calibrates the conductivity to 89-90   and when pulled out goes to 0. I have wiggled the wire while reading in the test slot and it DOES NOT appear to be moving to  200 like you see when the meter goes bad. see pictures
the stand alone meter calibrates 89 but you can adjust it from a potentiometer to get the reading you desire. I actually prefer the stand alone unit because you never have to worry about weak batteries causing false readings, but the trade off is you need electrical power to use the unit
Both are used and cases are not real clean but the meters appear to work as normal. For that reason we are selling them for 450$ firm
the sale is final ,and we do not accept returns