Power Meter TW3211 TW3211 optical power meter Is a handheld optical power meter, newly released in 2007, which can be used for absolute optical power measurements as well as for relative loss measurements in optical fibers. A ?1.0mm photosensitive area photodiode is used to significantly improve the stability and the reliability. It features ingenious appearance, a wide range of power measurement, high accuracy, an user self-calibration function and a reference power level storage. Features Wide dynamic measurement range (up to 80dB) Reference power level storage(Ref Setting) User self-calibration function Comfortable LCD display and backlight LCD display supports night operation. Power measurements in dBm or mw and insertion loss in dB Optional 10 minutes Auto-off function AA alkaline batteries can last more than 140 hours, AC adaptor also available Low battery power indication ApplicationsMaintenance in Telecom Maintenance CATV