Inspect the PTFE junction for clogging and clean as needed

00 ppm(as NO 3 ¯ ) 0

Wide Instrument Compatibility:

✅ Lab-grade SE220 double junction gel-filled electrode — low maintenance

rinse the probe with distilled water after each use

Bluelab 2.77 EC Conductivity Standard Solution – 250 ml / 8.4 fl oz 891144000250 Inspect the PTFE junction forConductivity standard solution a must in every grower's toolbox Features: Contain 1 bottle 250 ml 8. 6 fl oz Improve EC PPM accuracy with regular cleaning Bluelab 2. 77 EC Conductivity Standard Solution is a precision calibration fluid designed for lab grade EC conductivity meters. This 250 ml bottle delivers consistent, traceable reference values essential for accurate nutrient solution monitoring and water quality testing. Use this standard to