The Testo 545 (0560 0545) Lux Meter with Measurement Site Management comes with a permanently attached light sensor, which allows you to quickly and reliably measure the light intensity in the workplace, and at offices, schools, and hospitals. The meter can be used for selective and long term light intensity measurements. It has a built-in data logger which can save up to 3,000 readings, and can be used to perform selective and time-based averaging.

Optional PC software (# 0554 1704) allows you to set up to 99 measuring sites, allocate the readings to the relevant measuring sites, and connect individually saved readings to form a curve. The light profile obtained from such data provides you with a picture of the uniformity of the lighting.