How to Calibrate the Hach LDO Probes
Let us first look at the probe. The Hach dissolved oxygen probes are equipped with a measuring LED that emits…
Tag: HQ Meter
Whats the right electrode for a Hach HQD meter measuring Boiler Water
I have bought a Hach HQ40D for measuring boiler water and the supplied gel filled electrode is giving some erratic…