孟加拉采购需求：中国激光甲烷泄漏检测仪，激光甲烷遥测仪

We are looking to purchase two units of a portable laser methane detector with the following specifications: it should accurately measure methane (CH4) within a range of 0-99,999 ppm.m or higher, and have a maximum measuring distance of 100-150 meters. The device must feature a sensitivity of at least 5 ppm.m and provide visible, audible, and vibration alarms. It should operate effectively in temperatures ranging from -20°C to +50°C. Additionally, we require that the measuring technology be based on a laser beam, with an ingress protection rating of IP66 or higher. The sensor life should be a minimum of 10 years, and the display must be either color LCD or LED. The power source should consist of a rechargeable lithium-ion battery, offering a working time of at least 8 hours. Accessories should include a charger, belt, and screen cover, along with a warranty of no less than one year. We also expect two spare batteries and one spare charger to be included with the purchase.