SI-131 Ultra-Narrow Field of View Infrared Radiometer Sensor 14º APOGEE

SI-131

Apogee Instruments

New

915,00 €

tax excl.

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Spec Sheets:SI Series Owner's Manual:SI Series Sample Programs:Edlog,CRBasic,LoggerNet Short Cut Instructions Infrared Temperature Sensor

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The SI-131 14º sensor provides accurate measurement of the leaf-to air temperature gradient is important for irrigation scheduling and the determination of energy transfer, transpiration rate, and stomatal conductance in both single leaves and plant canopies.

apogee-infrared-radiometer

Apogee infrared radiometers are the most accurate non-contact temperature sensors available anywhere. The SI-131 has a 14 degree half angle field of view. The sensor has tinned leads for connecting to a datalogger. Applications include measuring the temperatures of road surfaces, plant canopies, and soil, snow and water surfaces. Measurement of surface temperature is a crucial component of energy transfer. Accurate measurement of the leaf-to-air temperature gradient is essential to the determination of transpiration rate and stomatal conductance in both single leaves and plant canopies.


Approximate Sensitivity: 20 μV per C

Output from Thermistor: 0 to 2500 mV (typical, depends on input voltage)

Input Voltage Requirement: 2500 mV excitation (typical, other voltages can be used)

Calibration Uncertainty (-20 to 65 C): 0.3 C, when target and detector temperature are within 20 C

Calibration Uncertainty (-40 to 80 C): 0.5 C, when target and detector temperature are different by more than 20 C

Measurement Repeatability: < 0.05 C

Stability (Long-term Drift): less than 2 % change in slope per year when germanium filter is maintained in a clean condition

Response Time: 0.2 s

Field of View: 14° half angle

Spectral Range: 8 to 14 μm; atmospheric window

Operating Environment: -55 to 80 C, 0 to 100 % relative humidity (non-condensing)

Dimensions: 2.3 cm diameter and 6.0 cm length

Mass: 190 g (with 5 m of lead wire)

Cable: 5 m of four conductor, shielded, twisted-pair wire. Additional cable available in multiples of 5 m. Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions). Pigtail lead wires.

The AI-100 radiation shield improves the performance of Apogee infrared sensors in applications where there is a significant solar load on the sensor housing.
This shield is included on all new infrared sensors and is offered as an accessory for customers wishing to retro-fit previously purchased infrared sensors.

 

Solar Radiation protector AI-100
Included with every SI-111

Protector AI-100

SI-111-Infrared-Sensors

Apogee Mast Bracket AM-210

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