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Warranty Information

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Keithley Instruments, Inc. warrants its instruments and data acquisition hardware to be free from defects in materials and workmanship for a period of 1 year from the date of shipment, with the following exceptions:

  • 90 days for probes, cables, optical fiber, rechargeable batteries, diskettes, and documentation.

During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.

To exercise this warranty, write or call the local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio. You will be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service facility. Repairs will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for the balance of the original warranty period, or at least 90 days.

Want additional coverage? Save money and avoid unbudgeted service expenses with an extended warranty. 

Limitation of Warranty

This warranty does not apply to defects resulting from production modification without Keithley’s express written consent or misuse of any product or part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from battery leakage, or problems arising from normal wear or failure to follow instructions.

This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty of merchantability or fitness for a particular use. The remedies provided herein are buyer’s sole and exclusive remedies.


Neither Keithley Instruments, Inc. nor any of its employees shall be liable for any direct, indirect, special, incidental or consequential damage arising out of the use of its products even if Keithley Instruments, Inc. has been advised in advance of the possibility of such damages. Such excluded damages shall include, but are not limited to: costs of removal and installation, losses sustained as the result of injury to any person, or damage to property.