For products under warranty, when there is a warranty repair needed, there are no fees or repair costs. We do, however, charge an evaluation fee of $50.00 for products that are NOT under warranty, or for products that have no defects in material or workmanship. The warranty covers "defects in materials and workmanship under normal use and service." If a repair is needed, but it's not due to defects in material or workmanship, then the $50.00 evaluation fee would apply. If a unit is sent in and no repairs are needed, we have to charge the evaluation fee to cover our costs.
However, if you have to pay the $50 fee, it will count towards the repairs costs. The goal isn't to charge you extra money, but to prevent a business loss due to erroneous warranty claims.
We require you to cover the cost of shipping your unit back to us as it has not yet been evaluated. Once we receive your unit and can verify that it is indeed under warranty, we will repair it and ship it back to you at no additional cost.
In this case, "under warranty" means that it needs repairs due to a defect in material or workmanship for normal use and service. That just means that we have to find something wrong with the unit, and that you cannot use our sensors for applications outside of their design. To give you an example of a use beyond the scope of the design, we wouldn't cover water damage on a sensor lacking the proper IP and/or NEMA ratings.