Instantaneous sensor output or 15-second averages can be shown on the LI-250A’s display. Measurement units for any LI-COR sensor (µmol, lux, klux, or W m-2) are also displayed. High Quality Circuitry The high quality amplifier in the LI-250A provides excellent long-term stability and automatic zeroing. This high gain amplifier gives very low input impedance to sensors, resulting in excellent linearity. Typical accuracy is 0.4% of reading at 25 °C.
The LI-250A simplifies operation by automatically selecting the range with the best accuracy and resolution for a given sensor input signal. The wide dynamic range allows measurements in a wide variety of light environments.