The TR-74Ui Temperature Humidity Light Data Logger can simultaneously measure and record illuminance, ultraviolet light (UV), temperature and humidity. In addition to these, the TR-74Ui Temperature Humidity Light Data Logger is also capable of displaying cumulative illuminance and cumulative amount of ultraviolet light in the LCD display. The product is an all-in-one package that includes the data logger unit, sensor and software. By simply connecting to a PC via a USB connection and carrying out a few easy steps, the measurement and recording of data can be started. TandD TR-74Ui Records luminance, UV, temperature and humidity Luminosity range 0 -130k lx UV range 0 – 30 mw/cm2 Internal exposure accumulation Cosine corrected readings Temperature measuring range: -0°C to 55°C Humidity measuring range: 10% to 95% RH External sensors included USB interface to PC 8,000 point/channel memory