HI 9813-6N is a versatile water resistant multiparameter portable meter specifically designed for agricultural applications such as hydroponics greenhouses farming and nurseries. It features an extra large LCD that clearly displays the parameter being measured as well as calibration instructions. Calibration is fast and easy with knobs located on the front panel of the instrument. HI 9813-6N is a pH/EC/TDS meter designed for simplicity of use in taking pH mS/cm ppm and temperature in the °C scale measurements. HI 9813-6 includes all the features of the HI 9813-5 while incorporating our exclusive CAL CHECKTM feature. CAL CHECKTM allows the user to easily check the probe calibration status at any time. Both instruments utilize the HI 1285 series pH/EC/TDS/temperature probe. This probe features a fiber junction and gel electrolyte making it ideal for fertilizer solutions. Features Water resistant On-screen user guides-Save time with on-screen calibration guides.