Measure pH, conductivity (EC), and TDS (ppm) with the HI1285-6 multiparameter probe. Perfect for measurements in greenhouses, water treatment, and boilers and cooling towers with a polypropylene body, built in temperature sensor, and pre-amplified pH electrode. The HI1285-6 is designed for use with HI9813-6 Portable pH/EC/TDS/Temperature Meter with CAL Check™.