Hanna TDS Pens 98301 DiST1

Use Hanna Digital TDS Pens to help maintain consistent nutrient concentrations. Available in waterproof and non-waterproof models, all readings are in Parts Per Million (ppm). The DiST1 features a large LCD, a graphite sensor interface for greater accuracy, and an external temperature sensor. This pen should be calibrated at least weekly to ensure accurate readings. It is critical to use Hanna calibration solution to avoid problems. This Model uses Hanna 1382 ppm. All units ship with a one time use packet of the proper solution.