TDS and EC Calibration NaCl solution 342 ppm 3 oz. bottles (90 ml)

For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges.

FEATURES:

• NaCl calibration solution, available in 342 ppm or 1000 ppm
• Comes in lightweight HDPE plastic bottles
• Sealed with a coated foam liner