Pen Type Waterproof pH Meters 8684/8685/8686
■ Lowest Cost pH Pen Type
■ Dual Display Temp. & pH With Atc
■ One Touch For Auto-Calibration
■ Waterproof Housing Meets IP65 Rating
■ Automatic Buffer Recognition To Avoid Errors During Calibration
Handheld Type pH Meter 8601
■ Dual Display pH/mV & Temp
■ Automatic Temperature Compensation
■ RS232 Interface
■ Backlight Display