HM Digital 1000 ppm Calibration Solution, 20 mL Packet - Pack of 20

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

• NaCl calibration solution, available in 1000 ppm
• Comes in lightweight HDPE plastic bottles or 20 mL packets
• Sealed with a coated foam liner