If you are going to be ordering a custom sensor then you definitely want Go with the quote that has the best price but that also has good service and guarantees their sensors. Find out more here http://www.positek.com/submersible-linear-sensors.
Working with a manufacturer that offers after sales services is a good idea because you never know what might happen after you buy the sensor and if you need service, it could be hard to find if you don't have after sales service from the original manufacturer.
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