Built to withstand real-world testing environments

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

Inspect the PTFE junction for clogging and clean as needed

Wide Instrument Compatibility:

you and your loved ones will always have a sustainable source of safe

Bluelab 2.77 EC Conductivity Standard Solution – 250 ml / 8.4 fl oz 891144000250 Built to withstand real-world testingConductivity 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