Computer maker Itronix is hoping to see a big bump in sales to outdoor types with the release of a rugged slate-tablet PC that it says can withstand temperature extremes and other harsh conditions. Called the Duo-Touch, the new portable PC will be available next month with a limited three-year warranty and a base price of $3,195. Itronix said it’s focused on selling the computer to mobile professionals who work in industries such as telecommunications, utilities, government and insurance. The name Duo-Touch refers to the company’s redesign on the touch panel that allows users to work with either an active touch screen or a passive touch screen and standard digitizer.