Hanna HI50036P Groline Quick Cal Solution - pH & EC/TDS Calibration (25 x 20mL) emergency water MI407 has a built in

MI407 has a built in timer that ensures appropriate reaction time is used for the chemical reaction

This add-on operates automatically

Eco-friendly: Reduce plastic waste from bottled water

double-junction MA911B/2 lab-grade pH electrode (included) for low maintenance and high performance

EC is often converted to TDS in parts per million (ppm)

Hanna HI50036P Groline Quick Cal Solution - pH & EC/TDS Calibration (25 x 20mL) emergency water MI407 has a built inHanna HI50036P Groline Quick Cal Solution Professional pH & EC TDS Calibration The Hanna HI50036P Groline Quick Calibration Solution is a professional grade, dual purpose calibration standard designed for fast, accurate single point calibration of Groline pH and EC TDS meters. Each box contains 25 individually sealed 20mL sachets that deliver fresh, uncontaminated calibration solution every time, ensuring optimal meter accuracy for hydroponics,