Apera GroStar pH Calibration Kit pH 4/7 Clone Plug hydroponic

hydroponic

* Blinking green SLOW: If you see a slowly blinking green LED

and operates very quietly

the PX2 can control 512 digital HID fixtures (256 per zone)

an in-line pre-filter with 200 mesh (80 micron) screen

Apera GroStar pH Calibration Kit pH 4/7 Clone Plug hydroponicGroStar by Apera pH calibration kit (pH 4 7, 8 oz. each) Kit includes: (1) 8 oz. pH 4. 0 calibration solution (1) 8 oz. pH 7. 0 calibration solution pH measuring equipment must be cleaned and calibrated regularly to ensure accurate readings. High accuracy (0. 01 pH): standardized against NIST Certified pH references within 0. 01 pH at 25C (77F). ideal for the calibration of all pH meters Color coded, double sealed, 1 year shelf life Expiration date