PAR sensors & meters
QSO-S photosynthetically active radiation
- Measure photosynthetically active radiation (PAR) or photosynthetic photon flux (PPF)
- Low cost, high accuracy sensor that is ideal for researchers and growers
- Measure the plant growth environment
- Easy-to-use, calibrated sensor that is ready to measure
- Connect to our range of data loggers or handheld meters
The model QSO-S PAR Photon Flux sensor measures the Photosynthetic Photon Flux (PPF), also known as PAR (Photosynthetically Active Radiation) in μmol m-2 s-1 from a field of view of 180 degrees.
The QSO-S is ideal for scientific researchers and commercial growers because it characterises exactly the light environment that is experienced, or sensed, by plants. The information measured by the QSO-S can be used to determine plant growth, yield and to parameterize models.
handheld or continuous measurement options
The QSO-S easily connects into the Procheck Handheld Meter for a portable measurement option. Simply insert the stereo plug into the Procheck and measurements will be displayed on the LCD screen. The Procheck can support additional sensors and parameters including soil moisture, water potential, temperature, relative humidity, and solar radiation.
For continuous measurement, the QSO-S is supported by the Em50 Data Logger or Em50G Wireless Data Logger. The PAR sensor connects directly into the Em50 or Em50G and is pre-programmed and ready to measure.
weather station options
For optimal measurements, the QSO-S PAR sensor can be connected to our range of weather stations.
The QSO-S sensor provides valuable measurements on the light environment. However, this information can be incomplete because it does not include other important variables for plant growth including rainfall, temperature, relative humidity, vapour pressure deficit (VPD) and wind speed and direction. By connecting the QSO-S to a weather station system, complete knowledge of the plant growth environment can be obtained.
|Spectral Range||400 to 700nm|
|Resolution||2 μmol m-2 s-1|
|Field of View||Hemispherical, 180°|
|Measurement Range||Linear Range: 0-1000 mV (0-5000 μmol m-2s-1) | Full Sunlight: 400 mV (2000 μmol m-2s-1)|
|Calibration||Sensors are calibrated for outside use.|
|Conversions||5.0 µmol m-2 s-1 per mV|
|Operating Temperature||-40 to +60°C|
|Power Supply||None, self powered|
|Cable Length||Standard: 5m | Extendable to custom lengths|
|Cable Connector Types||3.5 mm "stereo" plug | 3 core bare wire|
|Sensor Dimensions||2.4 cm x 2.75 cm|
|Data Logger Compatibility||Standard: Em50, Em50G | Other: CR300, CR1000, Spider, MicroSpider|
|Warranty||One year, parts and labor|