DFRobot SEN0641 RS485 PAR Sensor
DFRobot SEN0641 RS485 Photosynthetically Active Radiation (PAR) Sensor is a high‑precision instrument designed to measure light within the 400nm to 700nm spectral range, essential for evaluating the radiation plants use during photosynthesis. Using advanced photoelectric sensing technology, the DFRobot SEN0641 converts incident light into a voltage signal proportional to radiation intensity, with a cosine‑corrected response that ensures accurate readings regardless of the light’s angle of incidence. The sensor features a durable IP67‑rated metal aluminum enclosure and a specially treated dust‑resistant optical cover, providing stability and reliability in harsh outdoor environments. Supporting a wide 5VDC to 30VDC power supply and RS485 communication via the Modbus‑RTU protocol, SEN0641 integrates easily with Arduino and other monitoring platforms. Ideal for agricultural research, crop growth monitoring, environmental and ecological studies, and photovoltaic system analysis, the SEN0641 delivers precise PAR measurements expressed in μmol/m2·s, helping users better understand and optimize plant growth conditions.
Features
- Designed to measure the amount of light that plants can utilize during photosynthesis
- 400nm to 700nm spectral range
- Converts sunlight into a voltage signal that is directly proportional to the intensity of the incident radiation
- Sensitivity follows the cosine of the light's angle of incidence
- Equipped with a level and adjustment handwheel, convenient for on-site adjustment
- Equipped with a specially treated dust cover
- Supports Modbus-RTU communication via RS485
- Adopts a high-quality cosine corrector to ensure a standard cosine response
- Wide 5VDC to 30VDC voltage range
- High precision and reliability
- Durable and weather-resistant, metal aluminum shell material, IP67 protection
Applications
- Agricultural monitoring - measures light intensity for optimizing crop growth and assessing plant health
- Photovoltaic systems - monitors solar radiation for efficient solar energy generation
- Environmental and ecological research - collects data on radiation levels to support environmental studies and ecological conservation efforts
Specifications
- 5VDC to 30VDC power supply range
- <10mA operating current
- RS485 output mode
- 0µmol/m2·s to 2500µmol/m2·s measurement range
- 400nm to 700nm wavelength range
- ±5% accuracy (1000µmol/m2·s at 550nm, 60%RH, +25°C)
- 1µmol/m2·s resolution
- 10µs response time
- <±1% non-linearity
- ≤±2% annual stability
- ≤±10% cosine respnse
- -25°C to +60°C operating temperature range
- IP67 protection
- 200mm sensor cable length
- 700mm adapter cable length
Kit Contents
- 1x RS485 PAR sensor
- 1x adapter cable
- 1x screw package
Connection Diagram
Dimensions: mm
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