Three types of sealed photodiode sensors are now available:
• A photosynthetically active radiation PAR sensor (the QS2)
• A solar energy flux sensor (the ES2)
• A range of three UV sensors (the UV3pA, UV3pB, & UV3pAB)
These sensors replace the previous Delta-T models offered.
• mV outputs pre-set to identical standard values for each sensor type
• Self-cleaning, stay-dry diffuser with water drainage slots
• Good cosine response with infinity error correction ring
• Quality photodiodes – high stability with low temperature coefficient
• Hard-anodised aluminium body
• Lower purchase and recalibration cost
The UV sensors are fitted with a transimpedance amplifier operating from a single rail power supply. All sensors can be provided with an optional aluminium mounting plate (type SRLF1) which includes a bubble level, and levelling adjusters.Alternatively a levelling plate is available for standard Delta-T weather station masts (takes 2 ES2 or QS2 or 1 E/QS2 and 1 UV3p)
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Type
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ES2
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QS2
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UV3pA
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UV3pB
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UV3pAB
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Spectral region
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Solar Energy
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PAR
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UV “A”
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UV “B”
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UV “AB”
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Spectral response
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400–1050 nm
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400–700 nm
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|
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Peak wavelength
|
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373 ±2nm
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313 ±2nm
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360 ±5nm
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Bandwidth
|
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31 ±2nm
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26 ±2nm
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72 ±5nm
|
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Relative spectral response
|
Standard graph for all sensors
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Individual spectral response for each sensor
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Ouput sensitivity
|
10 mV per
kW m-2 of total solar radiation
|
10 mV per mmol m-2 s-1
|
1 mV per W m-2
|
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Accuracy (error) at 20°C traceable to NPL & BSI stds
|
±3%*
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±5%
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±7.5%
|
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Measuring range
|
0-2 kW.m-2
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0-3 mmol m-2 s
|
0-150 W m-2
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0-150 W m-2
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0-200 W m-2
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Cosine corrected
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within ±5% up to 70o incidence
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within ±5% up to 70o incidence
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Voltage supply
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n/a
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7-15 V dc (<12mA>
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Size (mm)
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48 high x 30 dia
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48 high x 50 dia (base)
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* Calibrated under a spectro-radiometrically controlled Lambertian Source.
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