INFWIN PYR20-Solar Radiation/Pyranometer Sensor
The INFWIN PYR20 is a pyranometer (solar radiation sensor) with RS485/Modbus-RTU, analog voltage, or analog current output, measuring global solar irradiance - both direct and diffuse. Internal temperature compensation minimizes the error caused by self-heating of the sensor. Each unit is calibrated against an Eppley Precision Spectral Pyranometer for excellent accuracy and consistency. Range, power supply, output interface, and cable length are configurable via ordering code - the default variant (PYR20-AAC002) ships with a 0–2000 W/m² range, RS485/Modbus-RTU output, 3.9–30V DC supply, and a 2 m cable. A spring-loaded mounting bracket with a built-in level indicator makes it straightforward to install the sensor level and pointed skyward. Reverse power protection and built-in TVS/ESD protection are included. Key Features Reference-calibrated: Each sensor calibrated against an Eppley Precision Spectral Pyranometer for high accuracy and consistency across units Temperature compensated: Internal compensation minimizes self-heating error Broad spectral range: 400–1100 nm, covering the solar spectrum relevant to photovoltaic and plant growth applications Flexible output interface: RS485/Modbus-RTU, RS485 + analog voltage, RS485 + analog current, analog voltage 0–2V, analog current 4–20mA, or SDI-12 (see ordering code) Level indicator and spring-loaded mount: Simplifies accurate, level installation Weatherproof: IP66 rated for direct outdoor use Wide operating range: −40°C to +85°C Reverse power protection: Built-in TVS/ESD protection RS485 Modbus-RTU protocol: Standard Modbus register map; configurable slave address, baud rate, parity, and stop bits Configuration utility: SensorOneSet software included for sensor configuration via RS485 Cable length: 2 m standard; custom lengths available Applications Scientific research Solar power monitoring and photovoltaic system performance Greenhouse and horticultural light management Weather stations Important Notes Directional error grows off-axis: ±3% of reading from 0–70° incidence, widening to ±10% from 70–85° - mount the sensor level and unshaded for best accuracy. 4–20mA output requires 12–30V DC supply; the 3.9–30V DC and 2.7–16V DC supply options are not compatible with 4–20mA output. Mounts via three screw holes. Specifications Solar Irradiance Range 0–2000 W/m² Resolution 1 W/m² Accuracy ±5% Spectral range 400–1100 nm Directional error ±3% of reading (0–70° incidence); ±10% of reading (70–85° incidence) Output Interface (selectable) RS485 Modbus-RTU Default for PYR20-AAC002 Analog voltage 0–2V (output resistance ~0 Ω) Analog current 4–20mA (load resistor <500 Ω) SDI-12 Available as ordering option Power Supply (per output type) RS485 / Analog voltage 3.9–30V DC (7mA @ 24V DC) Analog current 4–20mA 12–30V DC (30mA @ 24V DC, with 20mA output signal) Low-power option 2.7–16V DC (not applicable for 4–20mA output) Mechanical Dimensions 75 × 55 × 58 mm IP rating IP66 Installation 3 × screw hole mounting, spring-loaded with level indicator Cable length 2 m standard; custom length available Environmental Operating temperature −40°C to +85°C Ordering Code Guide Code 1: Product Series PYR20 PYR20 pyranometer series Code 2: Range A B 2000 W/m² Customize Code 3: Power Supply A B 3.9–30V DC 2.7–16V DC Code 4: Output Interface A B C D E F G Analog Voltage 0–2V Analog Current 4–20mA RS485, Modbus-RTU RS485, Modbus-RTU + Analog Voltage 0–2V RS485, Modbus-RTU + Analog Current 4–20mA SDI-12 Customize Code 5: Cable Length 002 XXX 2 meters Custom (XXX = length in meters, e.g. 005 = 5 m) Default Variant: PYR20-AAC002 Range 2000 W/m² Power supply 3.9–30V DC Output interface RS485, Modbus-RTU Cable length 2 meters Custom variants (range, power supply, output interface, cable length) are available - contact us to discuss your requirements. Technical Documents User Manual SensorOneSet Configuration Utility Modbus is a registered trademark of Schneider Electric. SDI-12 is a trademark of the SDI-12 Support Group. Eppley Precision Spectral Pyranometer is a trademark of The Eppley Laboratory, Inc. INFWIN is a registered trademark of Dalian Endeavour Technology Co., Ltd. MCCI and MCCI Catena are registered trademarks of MCCI Corporation. All other trademarks are the property of their respective owners.