The HI98120 is a waterproof ORP and temperature meter, while the HI98121 measures pH, ORP and temperature.
The housing of these testers has been completely sealed against humidity and is designed to &oat.
Electrode replacement with the stainless steel round connector means there are no pins to bend or break during replacement.
When the cloth junction becomes clogged and response time is sluggish, simply pull out 3 mm (1/8”) to clear the clogging which
will improve response time and stability.
