Power Meter TW3203R TW3203R handheld optical power meter is the oldest portable test instrment in the Techwin power meter series. It features compact size, ease-of-use and economy advantages. It can be used for absolute optical power measurements as well as for relative loss measurements of optical fibers. TW3203R is an essential test instrument in Optical Communications, CATV and other Fiber Optic measurements. Features Displays optical power in mW,dB and dBm Energy-saving design, 10 minutes Auto-off function Low battery power indication ApplicationsMaintenance in Telecom Maintenance CATV Test Lab of optical fibers Other Fiber Optic Measurements