NUTRIFIELD PH BUFFER 4.00 250ml

Nutrifield pH calibration solutions assist in the measurement of nutrient solution pH by ensuring that pH measurement devices provide accurate readings.

Directions: To ensure accurate readings in the pH 4-7 range. calibrate the pH measurement device following the device's usage instructions to both the Nutrifield pH 4 and pH 7 calibration solutions. pH measurement devices should be calibrated weekly or as needed.