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I N N O V A T I O N S controller. Previously the linear strips were exposed, and there was a risk that in environments of high temperature and humidity the strips could distort, or they could be contaminated with sawdust, which from some species of timber can be chemically aggressive or highly abrasive. A re-design means that the linear strips are now installed inside a housing so that they are protected from the environment. After logs have been sawn through the