GroChek pH/EC/TDS/Temp. Combo Hanna Instruments GroChek pH/EC/TDS/Temp. Combo (HI991404)This indicator continuously monitors the three most crucial nutrient parameters in hydroponic, greenhouse, and horticultural applications.
At startup, the GroChek performs a self-check to assure proper working condition. The stability indicator and HOLD function lets the user know when to take readings and freezes the readin... — Ships from HF: OR, CA, CO, MI, PA USA....more info.