• Detection of Concentration:300-10000ppm
• Input voltage: DC5V
• Power consumption (current): 150mA
• DO output: TTL digital quantities 0 and 1 (0.1 and 5V)
• AO output: 0.1-0.3V (relatively non-polluting), the highest concentration voltage is about 4V
• Using the chip: AT89S52
• Crystal: 11.0592MHZ
• Baud rate: 9600
• Compilation environment: Keil