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Enabling better global research outcomes in soil, plant & environmental monitoring.

Skye SKP 210 PAR 'Special' Sensor

Measures Photosynthetically Active Radiation.

  • Counts quanta of photons in µmol m-2 s-1
  • Matched to McCree’s Action Spectrum.
  • For plant and crop research.
  • Suitable for natural and artificial light sources.
  • Calibrated to National Standards.
Voltage Sensitivity 1mV/100 µmol m-2 s-1
Current Sensitivity 2µA/100 µmol m-2 s-1
Working Range 0-104 µmol m-2 s-1
Linearity Error <0.2%
Absolute Calibration Error Typically less than 3%, 5% max.
Cosine Error 3%
Azimuth Error <1%
Temperature Coefficient ±0.1% per °C
Longterm Stability ±2%
Response Time – Voltage Output 10ns
Internal Resistance – Voltage Output c.500 ohms
Operating Conditions -35 to +75°C
0-100% RH
Sensor Cosine corrected head
Detector Silicon photocell, low fatigue characteristics
Filters Optical Glass
Dimensions 38mm high, 34mm diameter.
140g (with 3m cable)
Construction Material Dupont ‘Delrin’ fully sealed to IP68
Cable 2 core screened DEF std 61-12/4.5

SKP210 response

Skye Instruments have been specialising in light and radiation sensors since 1983. All are designed, manufactured and calibrated to the highest standards. Each is supplied with a Calibration Certificate traceable to the UK’s National Physical Laboratory (NPL).

There are three PAR sensors in the range, PAR Quantum, PAR Special and PAR Energy models. All measure the Photosynthetically active radiation between 400-700 nm, the part of the solar spectrum used by plants for photosynthesis and sugar production.

The PAR Special sensor has a spectral response closely related to a green plant (McCree 1971/71) ie: it is more responsive in the red and blue areas of the spectrum and less responsive in the green region. This design is unique to Skye Instruments.

This sensor is often used alongside the more popular PAR Quantum sensor which has an “ideal” square response to PAR. Both measure photon irradiance, or quantity of PAR light and are calibrated in units of µmol m-2 s-1 (number or quanta of photons).

PAR sensors are suitable for use in natural solar radiation or any lamp or light source. Each is fully waterproof and guaranteed submersible to 4m depth.

They are compatible with Skye Display Meters, SpectroSense meters and DataHog loggers. A choice of outputs are also available to suit most dataloggers and controllers.

  • SpectroSense 2
    The Skye SpectroSense2 is 4-Channel meter for light sensors.
  • DataHog2 datalogger
    The DataHog 2 is a dedicated, accurate and reliable system, which is easy to use, completely weatherproof, robust, durable and low cost.