HI 1288 Preamplified pH and EC Probe Preamplified pH and EC probe recommended for general purpose, water treatment, agriculture, boilers and cooling towers.  To be used with HI 991300 and HI 991301. Read More »

HI 1285-5 Preamplified pH and EC Probe Preamplified pH and EC probe for greenhouses, hydroponics, environmental monitoring, water treatment, boilers and cooling towers. Read More »

HI 1285-6 Preamplified pH and EC Probe with CAL CHECK™ Preamplified pH and EC Probe with CAL CHECK™ for use with HI 9813 Series.  Recommended for greenhouses, hydroponics, environmental monitoring, water treatment, boilers and cooling towers. Read More »