LI-COR LI-250A Light Meter

Accuracy:

25 °C: Typically ± 0.4% of reading ± 3 counts on the least significant digit displayed (all ranges).

0 - 55 °C: Typically ± 0.6% of reading ± 3 counts on the least significant digit displayed (all ranges).

Range Selection: Autoranging (3 ranges).

Linearity: ± 0.05%.

Sensors: Designed for type "SA" sensors; type "SB" and "SL" sensors with BNC connectors are also compatible when calconnector or millivolt adapter are removed.

Sensor Calibration: Each sensor is supplied with a calibration multiplier. Calibration multipliers for two sensors can be stored in memory. Calibration multipliers are entered from the keypad.

Signal Averaging: Sensor output can be collected and displayed as a 15-second average (approximately 60 readings). Averages are retained on the display in HOLD mode.

Display: LCD display. Updated every 0.5 seconds in Instantaneous mode.

Battery Life: 150 hours typical with continuous operation.

Power Requirement: One 9V Alkaline battery.

Operating Conditions: 0 to 55 °C, 0 to 95% RH (non-condensing).

Storage Conditions: -55 to 60 °C, 0 to 95% RH (non-condensing).

Size: 14 cm × 7.7 cm × 3.8 cm (5.5" × 3" x1.5").

Weight: 0.26 kg (0.57 lbs).

LI-250A Range and Resolution:

Sensor/ Range/ Resolution

Quantum/ 0-199 µmol s^-1 m^-2, 0-1999, 0-19999/ 0.01 µmol s^-1 m^-2, 0.1, 1

Pyranometer/ 0-19 W m^-2, 0-199, 0-1999/ 0.001 Wm^-2, 0.01, 0.1

Photometric/ 0-1999 lux, 0-19999 lux, 0-199 klux/ 0.1 lux, 1, 0.01 klux