GroLine pH 4.01 Calibration Buffer (500 mL) Master Controller Includes KDF/carbon pre-filter and 75

Includes KDF/carbon pre-filter and 75 GPD membrane

T5 tube with reflector

safe to apply on food crops up to one day before harvest

Sold in cases of 1200

Stability Indicator - An hourglass indicator is displayed on the LCD until a stable reading is obtained

GroLine pH 4.01 Calibration Buffer (500 mL) Master Controller Includes KDF/carbon pre-filter and 75HI7004 050 is a high quality pH 4. 01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Hanna's line of technical calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened