This TDS tester pen is warranted to the purchaser against material and workmanship for 3 years.Repair and labor, or replacement at the company's option is covered in this digital TDS meter's warranty.Transportation charges, damages from abuses or improper maintenance, as per Using Instructions and Precautions, is not covered. As well as any other consequential damages, incidental damage, including damages to the TDS water tester. Except for some states where exclusive or limitation of incidental or consequential damages are not allowed.
4) This warranty may vary from state to state due to the extent of the prevision of the laws.
Precautions:Do not drop the entire digital TDS meter in water or dip beyond the maximum immersion level.Do not store the digital TDS meter under high temperature or direct sunlight.
c) The digital TDS meter is calibrated with 642 ppm standard (by Water Quality Association).