Envco – Environmental Equipment

Direct digital readout displays instantaneous sensor output of 15 second averages. Measures µmol, lux k lux or Wm-2. Meter automatically selects range with best accuracy and resolution for a given input signal so that measurements can be made in a variety of light environments.

High quality amplifier provides automatic zeroing capability and long term stability. Calibration multipliers can be entered easily, and two sensor multipliers can be stored in memory. HOLD key allows you to retain current reading or switch to measurement mode for continuous update of display.

Low battery indicator. Automatically shuts off after 20 minutes of inactivity. Avoid contact with water.

Sensors sold separately below.

Accuracy: 25°C: typically ± 0.4% of reading ± 3 digits on the least significant digit displayed (all ranges); 0-55°C: typically ± 0.6% of reading ± 3 digits on the least significant digit displayed (all ranges).

Range selection: Autoranging (3 ranges). Range: 199 µmol s-1 m-2, 1,999 µmol s-1 m-2, 19,999 µmol s-1 m-2.
Resolution: 0.01 µmol s-1 m-2, 0.1 µmol s-1 m-2, 1 µmol s-1 m-2. Linearity: ± 0.05%.

Display: 4-1/2 digit LCD display, updated every 0.5 seconds in instantaneous mode. Keypad: Sealed, 5-key tactile response keypad. Power: One 9-volt alkaline battery (included). Battery Life: 150 hours. Weight: 0.57 lbs. Dimensions: 5.5"L x 3"W x 1.5"D.

Ordering Information
LI-250A Light Meter

Options
250-01 Carrying Case
216 Replacement Battery. 9 volt transistor type.
Requires 1 for replacement.

Terrestrial Sensors
LI-190 Quantum Sensor
LI-200 Pyranometer Sensor
LI-210 Photometric Sensor
LI-191 Line Quantum Sensor
2003S Mounting and Leveling Fixture
2222SB Extension Cable (50 ft.)
2222SB-100 Extension Cable (100 ft.)

Underwater Sensors
LI-192 Underwater Quantum Sensor
LI-193 Spherical Quantum Sensor
2222UWB Underwater Cable. Standard lengths range from 3 to 100 meters.
2009S Lowering Frame