The EXTECH SDL400 Light Metre Datalogger is a professional-grade device that records data in Excel format on an SD card. It has a measurement range of up to 10,000Fc or 100kLux and ensures accuracy through cosine and color correction. The SDL400 employs a spectral response filter and a precision silicon photodiode.
This device also has an offset adjustment for the zero function to permit relative measurements, as well as customizable data sampling rates. It can manually save up to 99 measurements and has an astonishing capacity of up to 20 million readings with a 2GB SD card. It has a Type K/J Thermocouple input for high-temperature measurements.
The SDL400 has a big backlit LCD display for simple data viewing. It also includes useful functions like as minimum and maximum value recording and recall, data hold, and auto power-off.