Feature: 1. Superior Measurement Capabilities: This sensor can accurately measure solar total radiation within the spectrum range of 0.3 to 1.1μm. When positioned downwards, it can also measure reflected radiation. Additionally, with a shading loop, it can measure scattered radiation. 2. Aluminum Construction: Crafted from premium aluminum alloy, this solar radiation sensor offers long lasting durability. It utilizes precise photosensitive component, ensuring superior stability and accuracy. 3. Weather Resistant: The sun radiation detector is equipped with a precise quartz glass cover created through precise optical cold processing, effectively shielding it from environmental factors that could affect performance. 4. Easy to Use: The cover can protect the solar radiation sensor during transportation and prevent it from damage in adverse weather conditions. Simply rotate and unscrew the protective cover when in use. 5. Wide Application: With a power supply range of 9 to 30V and low power consumption of 0.48W, this sensor is suitable for a wide range of applications in meteorology, energy, farming, construction, and more. Specification: Item Type: Solar Radiation Sensor Material: Aluminum alloy Weight: Approx. 298.00g/10.5oz Product Size: Approx. 65x52x49mm/2.56x2.05x1.93in Bottom Hole Distance: Approx. 57mm/2.24in Wire Order: Red wire: power positive Green wire: power negative White wire: signal Power Supply: 9 to 30V Spectrum Range: 300 to 1100nm Resolution: 1W/m2 Measurement Range: 0 to 1500W/m2 Sensitivity: 7 to 14μV/W•m-2 Accuracy: ±5% Load Capacity: Current output impedance RL≤250Ω Voltage output impedance RL≥1KΩ Response Time: <5s Cosine Response: <±10% (sun height angle 10°) Non Linearity: <±5% Annual Variation: <±5% Operating Environment: Temperature -40°C to 60°C; Humidity ≤100%RH Power Consumption: 0.48W For Modbus CRC Checksum Steps: 1. Initialize a 16 bit register to hex FFFF, referred to as the CRC register. 2. XOR the first 8 bits of data with the low byte of the CRC register and store the result in the CRC register. 3. Right shift the contents of the register by one bit, filling the highest bit with 0, and check the lowest bit. 4. If the lowest bit is 0: Repeat step 3 (shift again). If the lowest bit is 1: XOR the CRC register with the polynomial A001 (1010 0000 0000 0001). 5. Repeat steps 3 and 4 for a total of 8 shifts, processing the entire 8 bit data. 6. Repeat steps 2 to 5 for the next 8 bit data. The final CRC register obtained is the CRC code (low byte first, high byte last). Troubleshooting: The displayed value on the instrument is incorrect during output. This may be due to wiring issues or communicating port failure, preventing the correct data acquisition. Please check the wiring for correctness and stability, make sure the serial port is not being used by other devices, and verify the serial port settings are correct.. Package List: 1 x Solar Radiation Sensor1 x Specification Note: 1. Please check whether the package is intact, and check whether the product model is consistent with the selection2. Do not connect the wires with electricity, check the wiring is correct before turning on the power3. The length of the sensor line will affect the product output signal, do not change when using4. The sensor is a precise device, do not disassemble the sensor, touch the sensor surface with cutting objects or corrosive liquids during use to avoid damage to the product5. When the sensor is in use, please remove the protective cover.