The LI-250 light meter has one BNC input port that accepts LI-COR light sensors. With these sensors the LI-250 can measure photosynthetically active radiation (PAR) in air or water, illuminance in units of lx or fcd, and solar irradiance in units of Watts/m^2r. The meter shows instantaneous values or 15-second averages of values from the sensor and automatically selects a sensitivity range to optimize accuracy and resolution for a given sensor. The accuracy of the device is typically ± 0.4 % ± 3 digits of the reading at 25 °C and ± 0.6 % ± 3 digits from 0 to 55 °C.
Reserve the correct light sensor for your project:
LI-COR Photometric Sensor LI-210SA
LI-COR Pyranometer Sensor LI-200SA
LI-COR Quantum PAR Sensor LI-190R