Hanna Instruments HI 98121 ph ph ORP Temperature Tester meter ph meter hydroponics
HI98121 ORP/pH/Temperature Tester The HI98121 is a waterproof pH, ORP and temperature meter. The housing of this tester has been completely sealed against humidity and is designed to float. 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. The exposed stainless steel temperature sensor on these models facilitates faster and more accurate temperature measurement. Waterproof Replaceable pH electrode with extractable junction Automatic 1 or 2 point pH calibration Details The HI98121 is a lightweight ergonomically designed tester. This tester is designed to float making it ideal for taking readings virtually anywhere. By definition pH is the measurement of the voltage generated by an electrochemical cell at zero current. The