[x]Close

Thank you for your request.

You will receive an email shortly.

If you do not receive it within 24 hours or if you have any questions, please contact LI-COR at 1-402-467-3576.

[x]Close
  • Form must be completely filled out.

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.

Request a Quote Download Brochure

LI-250A 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

LI-250A 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%.
  • 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: 4 1/2 digit 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 L × 7.7 cm W × 3.8 cm D (5.5" × 3" x1.5").
  • Weight: 0.26 kg (0.57 lbs).
  • Warranty: 1 year parts and labor.
  • 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 W m-2
    0.01
    0.1
    Photometric 0-1999 lux
    0-19999 lux
    0-199 lux
    0.1 lux
    1
    0.01 lux

Scroll to Top