Hobo S-LIA-M003 Manual

Photosynthetically Active Radiation (PAR)
Smart Sensor (S-LIA-M003) Manual
PAR Smart Sensor
S-LIA-M003
Accessories:
• Light sensor mounting
bracket (M-LBB)
• Light sensor level (M-LLA)
5942-G MAN-S-LIA
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The photosynthetically active radiation (PAR) smart sensor is designed to work with HOBO®
stations. The smart sensor has a plug-in modular connector that allows it to be added easily to a
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.

Specifications

Measurement Range
Accuracy
Angular Accuracy
Resolution
Drift
Operating Temperature Range
Environmental Rating
Housing
Dimensions
Weight
Bits per Sample
Number of Data Channels*
Measurement Averaging Option
Cable Length Available
Length of Smart Sensor
Network Cable*
* A single HOBO 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).
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.
Plot A: PAR Smart Sensor Typical Quantum Response
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0 to 2500 μmol/m
2
/sec, wavelengths 400 to 700 nm (see Plot A)
±5 μmol/m
2
/sec or ± 5%, whichever is greater in sunlight; Additional
temperature induced error ±0.75 μmol/m
(0.42 μmol/m
2
/sec/°F from 77°F)
Cosine corrected 0 to 80 degrees from vertical; Azimuth Error <2%
error at 45 degrees from vertical, 360 degree rotation
2.5 μmol/m
2
/sec
< ±2% per year
-40° to 75°C (-40° to 167°F)
Weatherproof
Anodized aluminum housing with acrylic diffuser and O-ring seal
4.1 cm height x 3.2 cm diameter (1 5/8 x 1 1/4 in)
120 g (4 oz)
10
1
Yes
3.0 m (9.8 ft)
3.0 m (9.8 ft)
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
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2
/sec/°C from 25°C
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