Apera Instruments 5052 Saltwater Salinity Pen Tester – Marine & Aquarium Meter TDS meter calibration hydroponics The replaceable sensor design means M10080B Replace membranes regularly to replacement cuvettes

The replaceable sensor design means you can swap out worn electrodes instead of replacing the entire unit

microorganism-safe

and other food products requiring invert sugar content measurement

and TDS (ppm) with the HI1285-6 multiparameter probe

Milwaukee pH Calibration & Maintenance Kit – pH 4

Apera Instruments 5052 Saltwater Salinity Pen Tester – Marine & Aquarium Meter TDS meter calibration hydroponics The replaceable sensor design means M10080B Replace membranes regularly to replacement cuvettes The replaceable sensor design means you can swap out worn electrodes instead of replacing the entire unit microorganism safe