Kestrel
®
4500 Pocket Weather
®
Tracker
cannot provide proof of purchase, your warranty period will be measured from our date of manufacture,
determined by serial number.
We request that you contact NK if you feel your product is not working properly. We can often solve
product issues by phone or e-mail, saving you the time and expense of returning the unit. If we require
the product to be returned, we will issue a Return Authorization to expedite the handling of your
warranty claim.
The Kestrel 4500 is covered by the following US patents: 5,783,753, 5,939,645, 6,257,074, and 7,059,170.
Calibrations, Certifications and Service
Every NK product is tested and calibrated before it leaves our factory. We guarantee that it will perform
within specifications when you receive it. Each Kestrel Meter comes with a Certificate of Conformity, with
the stated specifications for that product on the back. If you feel an NK product is not meeting specs
when you receive it, call us and we’ll make sure you are operating it correctly. If it still appears that it
may be out of spec, return it to us within 30 days of purchase and we will test and recalibrate all values
at no charge. Beyond 30 days, we offer reasonably-priced tests, calibration services and N.I.S.T. certified
calibrations as well as Kestrel Meter tune-ups.
All of our measurements are traceable to the National Institute of Standards and Technology, ensuring
the highest level of accuracy. Our primary Calibration Standards are sent for calibration in accordance
with N.I.S.T. requirements and based on a regular schedule. Only approved laboratories and N.I.S.T
themselves are used for these calibration services. Incoming and outgoing data is supplied with the
certificate of calibration.
We also offer full factory service on every product we manufacture for as long as we make the product
(and as long after as component availability permits). If we can’t repair a product, we will offer you a
