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Photosynthetically Active Radiation (PAR)
Smart Sensor (Part # S-LIA-M003)
The Photosynthetically Active Radiation (PAR) smart sensor is designed
to work with the HOBO
®
Weather Station logger. The smart sensor has a
plug-in modular connector that allows it to be added easily to a HOBO
Weather Station. All calibration parameters are stored inside the smart
sensor, which automatically communicates configuration information to
the logger without any programming, calibration, or extensive user setup.
Inside this Package
• PAR Smart Sensor
Specifications PAR Smart Sensor
Measurement Range
0 to 2500 μmol/m
Figure 1)
Accuracy
±5 μmol/m
2
Additional temperature induced error ±0.75 μmol/m
from +25°C (0.42 μmol/m
Angular Accuracy
Cosine corrected 0 to 80 degrees from vertical; Azimuth Error
< 2% error at 45 degrees from vertical, 360 degree rotation
Resolution
2.5 μmol/m
Drift < ±2% per year
Calibration Factory recalibration available
Operating Temperature Range -40° to +75°C (-40° to +167°F)
Environmental Rating Weatherproof
Housing
Anodized aluminum housing with acrylic diffuser and O-ring
seal
Dimensions 4.1 cm height x 3.2 cm diameter (1 5/8 x 1 1/4 in)
Weight 120 g (4 oz)
Bits per Sample 10
Number of Data Channels * 1
Measurement Averaging Option Yes
Cable Length Available 3.0 m (9.8 ft)
Length of Smart Sensor Network Cable * 3.0 m (9.8 ft)
Part Number S-LIA-M003
The CE Marking identifie
relevant directives in the European Union (EU).
* A single HOBO Weather Station can accommodate 15 data channels and up to 100 m
(328 ft) of smart sensor cable(the digital communications portion of the sensor cables).
2
/sec, wavelengths 400 to 700 nm (see
/sec or ± 5%, whichever is greater in sunlight.
2
/sec/˚ F from +77°F)
2
/sec
s this product as complying with all
2
/sec/˚ C
© 2001–2010 Onset Computer Corporation. Onset and HOBO are trademarks of Onset Computer Corporation.
Part #: MAN-S-LIA
Doc #: 5942-E
PAR Smart Sensor
Typical Quantum Response
The PAR smart sensor is designed to detect photons between 400-700 nm in wavelength. Ideally the
sensor would count photons with equal efficiency between 400-700 nm and no photons would be counted
outside this range. However, in reality, this sensor undercounts photons between 400-550 nm and
between 670-700 nm, and it over counts photons between 550-670 nm. In most applications (where the
sensor is used in natural sunlight) the error is not significant.
Figure 1: PAR Smart Sens
Page 2 of 5
or Typical Quantum Response
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