Introduction
This document is an Operation Manual containing diagrams and step-by-step instruction for proper operation of the Otis
Instruments, Inc. WireFree Model OI-6940 Notis Quad 4-Gas Sensor Assembly. This document should be read before
initial operation of the product.
Should a question arise during the use of the product, this document will serve as a first reference for consultation. If
further questions arise, or if the device is not working properly, please contact the sales representative of this product.
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