LI-250A
Light Meter
The LI-250A is a portable meter that displays the output from any LI-COR light sensor that has a cable terminated with a BNC connector. It shows instantaneous values or 15-second averages of values from a sensor.
The LI-250A automatically selects a sensitivity range to optimize accuracy and resolution for a given sensor. It provides a wide dynamic range for high-resolution measurements, even in low-light conditions.
LI-250A Features
Over 150 hours of operation from a single 9-vott battery
Automatic shut-off after 20 minutes of activity
O-ring sealed case for wheather protection
Compatible with the LI-190R, LI-191R, LI-192, LI-193, LI-200R or LI-210R.
Easy-to-enter calibration multipliers make it simple to change between sensors.
LI-250A Specifications
Warranty: 1 year parts and labor.
Weight: 0.26 kg (0.57 lbs).
Storage Conditions: -55 to 60 °C, 0 to 95% RH (non-condensing).
Operating Conditions: 0 to 55 °C, 0 to 95% RH (non-condensing).
Sensitivity: Typically 7 μA per 1,000 μmol s-1 m-2 in water.
Linearity: Maximum deviation of 1% up to 10,000 μmol s-1 m-2.
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).
| 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 W m-2 0.01 0.1 |
| Photometric | 0-1999 lux 0-19999 lux 0-199 klux |
0.1 lux 1 0.01 klux |
