SKR1840 NDVIobserveThe system can normalize the vegetation index of the canopy near the ground（NDVI）Conduct long-term positioning monitoring.NDVISensitive to green vegetation response, it is often used to study the growth status of vegetation.

SKR1840Spectral table combination is specifically designed forNDVISensors designed for observation, all of which have dual band channels（Chan1+Chan2）Among themSKR 1840DInstall measurement upwardsNDVIBand sensors,SKR 1840NDInstall measurement downwardsNDVIBand sensor.

technologyspecificationsParameters:

1Dual channel spectral sensor

(1)Sensor type: Dual wavelength channel（Chan1+Chan2）

(2)Chan1Wavelength range:650nmCenter wavelength,40nmbandwidth

(3)Chan2Wavelength range:800nmCenter wavelength,40nmbandwidth

(4)Structure:DuPont formaldehyde resin acrylic acid，527UV，Optical glass diffuser/window

(5)Detector:Si, GaP or GaAsPPhotodiode (depending on the selected wavelength and bandwidth)

(6)Cable:3Rice tape shielding

(7)worktemperature range：-25to+75°C

(8)workHumidity range：0-100%

(9)size：height86mm，diameter49mm

(10)Weight:295Ke（3Meter cable)

(11)output：current output

(12)linear：be better than0.2%

(13)cosine error：less than5%（typical）

(14)response time：less than100nanosecond（typical）

(15)absolute calibration：be better than5%（typical）

2、data collector

(1) CPU: 32bit，FPU，100Hz，1MBTransportation and storage

(2)Maximum scanning frequency:1000Hz

(3)Memory: 128MB, can be done throughMicroSDCard Expansion16GB

(4)clock accuracy: ±3minute/Year;10μm(Optional)GPS）

(5)measurement resolution: 0.02μV RMS

(6)Simulation accuracy: ±（0.04%reading+Drift)

(7)power supply: 16-32VDC（1.2A）Charging of solar panels;12VDCBattery; Internal battery;USB

(8)operation temperature: - 40~70℃(Standard),-55℃~85℃(Extended)

(9)analog input: sixteenA single ended channel（8A difference)

(10)Control terminal:digitI/O，RS232/RS485, Half/full duplex

(11)data interface: CS I/O*1One;CPI/CDM*1One;RJ-45 Ethernet 10/100M*1One;USB-micro B*1individual

Origin: United Kingdom