1. a signal output indication.
2. the dual signal output (analog output, and TTL level output);
3. TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller)
4. analog output 30 ~ 50mV voltage, the higher the concentration the higher the voltage;
5. carbon dioxide has a high sensitivity and good selectivity;
6. has a long life and reliable stability;
7. rapid response recovery characteristics;
8. the probe can plug design for easy testing.