The new Knowz™ combustible gas detector features high sensitivity to trace amounts of combustible gas, says the company. The unit is small and lightweight, measuring 2 1/2 by 2 by 1 in. and weighing 1 1/2 oz, the company says. It is dc-powered and can be connected to a 12-V system for use in vehicles. For home use, an ac adapter is provided. Options include dry relay contacts for activating alarms such as home security systems, fans, and gas shut-off valves. Neodym Technologies Inc., 675 W. Hastings St., Ste. 711, Vancouver, BC, Canada; 877-723-5400 or 604-685-1185; 604-685-3764 (fax); (website).