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OVERVIEW
The LI-250A Light Meter provides a direct digital readout for any LI-COR radiation sensor equipped with a BNC connector. It displays instantaneous sensor output or 15-second averages, along with measurement units for any LI-COR sensor (µmol s⁻¹ m⁻², lux, klux, or W m⁻²).
Why choose the LI-250A?
- Retains two sensor multipliers in memory to aid in switching between sensors, or for storing in-air and in-water multipliers when used with underwater sensors
- Automatic range selection for the best accuracy and resolution in a wide variety of light environments
- Uses a high-gain amplifier for long-term stability, automatic zeroing, and low input impedance, resulting in excellent linearity
Key features
- 15-second averaging is turned on or off by pressing a single button
- Over 150 hours of operation from a single 9-volt battery
- Automatic shut-off after 20 minutes of inactivity
- O-ring sealed case for weather protection
- Easy-to-enter calibration multipliers make it simple to change between sensors
- Compatible with the LI-190R, LI-191R, LI-192, LI-193, LI-200R, or LI-210R
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SPECIFICATIONS
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%. Range and Resolution: Quantum 0-199 µmol s-1 m-2; Resolution 0.01 µmol s-1 m-2
0-1999; Resolution 0.1
0-19999; Resolution 1Range and Resolution: Pyranometer 0-19 W m-2; Resolution 0.001 W m-2
0-199; Resolution 0.01
0-1999; Resolution 0.1Range and Resolution: Photometric 0-1999 lux; Resolution 0.1 lux
0-19999 lux; Resolution 1 lux
0-199 klux; Resolution 0.01 kluxSensors Designed for LI-COR sensors with BNC-type connectors. 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 × 7.7 × 3.8 cm (5.5″ × 3″ × 1.5″). Weight 0.26 kg (0.57 lbs).
LI-COR LI-250A Light Meter
Light meter providing a direct digital readout for LI-COR light sensors with a BNC connector. Displays instantaneous or 15-second averaged readings.
Pricing & Information
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