Airgreen\u2019s laser methane product page now brings together two purchase options: a sensor module for controller integration and a complete methane gas alarm with an LED concentration display and audible\/visual warning.<\/p>\n
The module uses laser absorption with diffusion sampling to measure methane (CH4). Its listed measuring range is 0\u2013100% Vol, with a 5 V DC supply and TTL UART serial output. The stated resolution is 0.01%, and the listed operating temperature is \u221210 to +50\u00b0C.<\/p>\n
This version is intended for integration with a compatible controller. Check the pin assignment, UART logic level and communication documentation before connecting it. TTL must not be connected directly to RS232 or RS485.<\/p>\n
The complete alarm is a separate purchase option for applications needing a local concentration display and audible\/visual warning. The module\u2019s 5 V and TTL specifications must not be assumed to apply to the complete alarm; confirm its own supply, wiring and interface requirements.<\/p>\n
%Vol and %LEL are different concentration units. Select the appropriate range and configuration for the project, and follow the supplied installation and calibration instructions. This update does not assert hazardous-area certification or suitability for every safety application.<\/p>\n
View the laser methane product and version details<\/a>. Contact chenyue@agnkj.com<\/a> to confirm configuration before ordering.<\/p>","protected":false},"excerpt":{"rendered":" \u6fc0\u5149\u7532\u70f7\u68c0\u6d4b\u4ea7\u54c1\u63d0\u4f9b 5 V TTL \u4f20\u611f\u5668\u6a21\u5757\u548c LED 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