PINPOINT® ORP (Redox) Calibration Fluid
Another American Marine first. ORP/REDOX calibration fluid.
With a precise measurement of 400mV this calibration fluid is included with every PINPOINT® ORP Monitor and PINPOINT® ORP Controller.
Occasional retesting with this fluid will keep your readings dead-on accurate.
Also very useful to determine if an ORP/REDOX probe is ready for replacement