• html slideshow
  • html slideshow
  • html slideshow
  • html slideshow
  • html slideshow
  • html slideshow
  • html slideshow
  • html slideshow
  • html slideshow
  • html slideshow
  • html slideshow

AccuPAR model LP-80 Ceptometer from Decagon Devices

Measure Canopy PAR and Calculate LAI
The AccuPAR model LP-80 is a lightweight, portable, linear photosynthetically active radiation (PAR) sensor. It lets you measure canopy PAR interception and calculate leaf area index (LAI) at any location within a plant or forest canopy.  PAR data can be used with other climate data to estimate biomass production without destroying the crop. PAR is also important in determining other canopy processes; such as radiation interception, energy conversion, momentum, gas exchange, precipitation interception, and evapotranspiration.

The AccuPAR also uses radiation measurements and other parameters to accurately calculate leaf area index (LAI) non-destructively in real time, in the field.

Lightweight, Self-contained
The AccuPAR weighs a little over 1 pound ( 0.5kg). The attached controller, powered by four AA batteries, can be used to take measurements manually or can log data unattended for short periods of time. It stores 1 MB of data (over 2,000 readings) for later download and analysis.

Includes External Sensor
The included external PAR sensor can be used to make simultaneous above- and below-canopy PAR measurements. Using both the external sensor and the AccuPAR together allows you to get accurate PAR and LAI data in clear, partly cloudy, or overcast sky conditions.

DATA STORAGE CAPACITY

1 MB RAM (over 2,000 measurements)

NUMBER OF SENSORS

80

PAR RANGE

0 to > 2,500 μmol m-2s-1

RESOLUTION

1 μmol m-2s-1

PROBE LENGTH

84 cm

OVERALL LENGTH

99 cm (40 in)

UNATTENDED LOGGING INTERVAL

User selectable, between 1 and 60 min

INSTRUMENT WEIGHT

0.56 kg (1.23 lbs)

DATA RETRIEVAL

Direct via RS-232

KEYPAD

7 key, menu-driven

OPERATING ENVIRONMENT

0-50°C (32-122°F), 0-100% relative humidity

EXTERNAL PAR SENSOR CABLE LENGTH

5 meters

INTERFACE CABLE

RS-232 cable

POWER

Four AAA Alkaline cells

MINIMUM SPATIAL RESOLUTION

1 cm