Light meters are lightweight, portable devices that are used to measure the level of light in a location. The flexible design allows for low, medium, and high density metering requirements to be met efficiently nd economically using only a few standardized components. Consequently SEM3 can be easily integrated into new Siemens Panelboard and. Compact and portable, our light source and optical power meter tools are essential for testing and verifying insertion losses in fiber links across various networks, including cable TV, enterprise, service provider, carrier, Ethernet, and FTTH networks. In photography, an exposure meter is a light meter coupled to either a digital or analog calculator which displays the correct shutter speed and f-number for optimum exposure, given a certain lighting situation and. The In-Licht Pro Portable Light Meter is a cutting-edge tool designed for a variety of industries that rely on accurate lighting measurements. With its compact size. Portable metering is often used by electricians, engineers and contractors to diagnose a problem or to provide insight into some phenomenon where permanently installed meters are not available. In this series, we dispel several common myths regarding selection and application of portable metering.