|
Small Sensors
|
ML-020 series
|
When living thing and plant receive natural and artificial light as illuminance
or light energy, reactions are very big different spectrally between human-body
and biology. Human eye reacts as illuminance and plant reacts as number
of photon. According to this fact natural and artificial light should
be selected very carefully for measurement of foundamental study of applied
research. Based on these background we have developped three kinds of
new sensor for such individual measuring purpose by our deep experience
about energy measuring fielld.
 |
|
||||||
|
|
Photon sensor ML-020-P for measuring the photosynthetic photon flux density |
||||||
|
|
Pyranometer ML-020VM for measuring global solar radiation |
||||||
PRINCIPLE OF MEASUREMENT
 |
Special designed collector and diffuser are mounted on the upper part of the detector. This optical component realizes excellent character for cosine response and sensitivity. The transmitting light flux reached to the filters whose spectral response coincides for individual measuring purpose illuminance, photon number and irradiance, as shown in the following figure, the Si-photodiode detects the flux through the filters and converts accurately to electric signal proportional to the flux. |
SPECIFICATIONS
|
Luxmeter
|
Photon sensor
|
Pyranometer
|
||
|
ML-020S-O High illuminance
|
ML-020S-I Low illuminance
|
ML-020P
|
ML-020VM
|
|
|
Spectral response
|
CIE Photopic Curve
|
Photosynthetically Photon Flux Density
|
Solar Irradiance (300 to 1100nm)
|
|
|
Measuring range
|
~ 150,000
|
~ 30,000
|
~ 3000
|
~ 1.4
|
|
Unit
|
lx
|
lx
|
µmol·s-1·m-2
|
kW/m²
|
|
Output
|
~30mV
|
~30mV
|
~10mV
|
~ 10mV
|
|
Internal resistance
|
280Ω
|
1.3kΩ
|
160Ω
|
10Ω
|
|
Temperature response (-10 to +50°C)
|
0.4%
|
0.4%
|
1.1%
|
0.5%
|
|
COS response (at 30/60/80°)
|
1 / 1.5 / 17 %
|
|||
|
Spectral error
|
2.3%
|
2.3%
|
7.7%
|
-
|
|
Output cable
|
5m, standard
|
|||
|
|
|
