Hanna High Range pH/EC/TDS/Temperature Monitors with Backlit Display

- The Combo HI 991404 and HI 991405 series meters from HANNA Instruments are designed for continuous, high accuracy pH, EC/TDS and temperature measurements. These microprocessor indicators continuously monitor the three most important nutrient parameters in hydroponics, greenhouses and horticultural applications with a single instrument. These indicators feature a large, dual-level, backlit LCD to give you instantaneous readings of pH, EC or TDS and temperature, even from a distance.