Product Spotlights HI981421 GroLine® Hydroponics Monitor with inline multiparameter probe The HI981421 GroLine Monitor provides 24 hour continuous monitoring of pH, conductivity (EC or TDS), and temperature in hydroponic nutrients. Quick to setup and simple to use, this monitor was designed with Hydroponics, Aquaponics, and Greenhouses in mind. Make your nutrient solution easy to manage with the GroLine Monitor and combined pH/EC/Temperature probe. See page 1.56 HI981520 Marine Monitor pH, Marine Salinity, and Temperature Testing and monitoring salinity in saltwater aquariums is an ongoing task. The HI981520 is an easy to use vertical mount unit that continuously monitors and displays conductivity and pH. See page page 1.64 1 Testers and Monitors 1.4 | www.hannainst.com
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