1、具有信号输出指示。

2、双路信号输出（模拟量输出及TTL电平输出）

3、TTL输出有效信号为低电平。（当输出低电平时信号灯亮，可直接接单片机）

4、模拟量输出0~5V电压，浓度越高电压越高。

5、对液化气，天然气，城市煤气有较好的灵敏度。

6、具有长期的使用寿命和可靠的稳定性

7、快速的响应恢复特性

-1, with the directions of the signal output. 2, two-way signal output (analog output, and TTL level output), TTL output valid signal is low. (When the signal light output low, 4, 0 ~ 5V analog output voltage, the higher the concentration, the higher the voltage can be connected directly to the microcontroller). 5, liquefied petroleum gas, natural gas, city gas, better sensitivity. 6, with a long service life and reliable stability, fast response and recovery characteristics