Hanna Instruments GroChek pH/EC/TDS/C Portable Meter w/Cal Check spl_hgc Adjustable CO2 setpoint from 400

Adjustable CO2 setpoint from 400 ppm to 2100 ppm

The Fan Heat Shield blocks the heat generated by inline duct fans from radiating off of them

KALIX Silica is 45% silicon dioxide derived from diatomite

Each jar has a heavy base to prevent tipping

The Upstart Garden Mat™ keeps your plants organized as it blocks weeds

Hanna Instruments GroChek pH/EC/TDS/C Portable Meter w/Cal Check spl_hgc Adjustable CO2 setpoint from 400HI 9813 6 is a versatile, water resistant, multiparameter portable instrument specifically designed for agricultural applications such as hydroponics, greenhouses, farming and nurseries. This meter features an 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 6 includes all the features of the HI 9813 5 while