The latest Davis Instruments Sourcebook features the newest test, measurement and control products from hundreds of the industry's vendors. The 73rd edition of this annual catalog contains 1,200 pages with over 80,000 products for electrical/electronic test, temperature, process control, air quality, pressure, plant maintenance and much more. Get free technical support for all products. To request your free catalog, call (800) 358-5525 or visit Davis.com/3534