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.
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 20,000 readings) for later download and analysis.
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.
Part number 40010
|Data Storage Capacity
||1 MB RAM (over 2,000 measurements)|
|Number of Sensors
|PAR Range||0 to > 2,500 μmol m-2s-1|
|Resolution||1 μmol m-2s-1|
|Overall Length||99 cm (40 in)|
|Unattended Logging Interval||User selectable, between 1 and 60 min|
|Instrument Weight||0.56 kg (1.23 lbs)|
||Direct via RS-232|
|Keypad||6 key, menu-driven|
|Operating Environment||0-50°C (32-122°F), 0-100% relative humidity|
|Interface Cable||RS-232 cable|
||Four AAA Alkaline cells|
|Minimum Spatial Resolution||1 cm|
WW Wilhelm, K Ruwe, MR Schlemmer. 2000. Comparison of Three Leaf Area Index Meters In a Corn Canopy. Crop Sci. 40:1179-1183
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7.6m (25 foot) cable with locking 3-pin circular direct connections to be used with the LP80’s external PAR sensor.
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