Louver Box Type Weather Sensor Air Temperature Humidity CO2 Light Intensity Sensor RS485 Output 9-30V Item Type: Weather Sensor Product Material: ABS Functions: Atmospheric Temperature, Atmospheric Humidity, Light Intensity, CO2 Power Supply Mode: 9-30V Output Form: RS485 Product Size with Bending Plate: Approx. 262 x 215mm / 10.3 x 8.5in Louver Box Size: Approx. 140 x 127mm / 5.5 x 5in Weight: Approx.1266g/44.66oz Measurement Type Range Accuracy Resolution Power Consumption Luminous Flux 0-200000Lx (Outdoor) ±4% 1Lx 0.1mW 0-65535Lx (Indoor) 0.1mW CO2 0-5000ppm ±(50ppm+5%) 1ppm 100mW Atmospheric Temperature -40-100℃ (Digital Signal Output) ±0.3℃(Standard) 0.1℃ 1mW Atmospheric Humidity 0-100 %RH ±5%RH (Standard) 0.1%RH Sensor Total Power Consumption: Multi Factor Power Consumption + Mainboard Basic Power Consumption Working Environment: -40℃-75℃ Main Board Basic Power Consumption: 200mw Protective Level: IP54 Wire Color and Wiring Sequence (RS485 Signal) Red Wire: VCC Power Supply Positive Pole Green Wire: GND Power Supply Negative Pole Black Wire: 485-A Yellow Wire: 485-B Checking Steps: 1. The preset 16 bit register is hexadecimal FFFF, is called CRC register; 2. The first 8 bit data is different from the lower part of the CRC register or put the result in the CRC register; 3. Move the contents of the register to the right one bit (towards the low), fill the highest bit with 0, and check the lowest bit; 4. If the lowest position is 0: repeat step 3 (shift again) If the lowest position is 1: the CRC register is XOR with polynomial A001 (1010 0000 0000 0001); 5. Repeat steps 3 and 4 until you move to the right 8 times, so that the entire 8 bit data has been processed; 6. Repeat Step 2 to Step 5 to process the next 8 bit data. 7. The resulting CRC register is the CRC code (the resulting CRC code is low before high after). Installation Site Requirements: 1. Good air circulation around 2. Keep away from exhaust ports, motors and other equipment 3. Stay away from areas such as standing water, fountains and sprinklers