产品特点：SM-BU系列基本型丁烷传感器采用双光束非分光红外线(NDIR)检测技术，具有抗其他气体干扰、保养维护简便、稳定性好、自带温度补偿、具有 Modbus ASCII协议数字输出等优点。适用于泄漏报警、现场施工防护、简单气体分析气体、在线监测、工业过程分析等多种场合。特征参数：                                                                                                                检测气体：丁烷C4H10                                                                                            检测原理：  红外线(NDIR)                                                                                     量程：0 to 100 % LEL                                                                                               检测精度：±2% FS（标准型）                                                                               ±1% FS（高精度型）                                                                                              低限报警：  7% LEL（可设置）                                                                                高限报警：14% LEL（可设置）                                                                             操作温度：      -10°C to 50°C                                                                                       操作压力：800 hPa to 1100 hPa                                                                               操作湿度： 0% to 95% RH                                                                                        预热时间：<2 min                                                                                                     响应时间： <25 S                                                                                                      工作电压 ：5.0 VDC ±5%                                                                                       工作电流   ：70 mA                                                                                                  输出：数字信号输出符合 Modbus协议                                                                使用寿命：10年                                                                                                        保存温度： -25 to 60°C