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气体传感器用标准气体
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气体传感器用标准气体

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标准气体名称：气体传感器校准气，可燃、有毒气体传感器标定样品气
标准气代表产品及用途：用于校准氧气传感器，氨气传感器，氯气传感器，氢气传感器，一氧化碳传感器，二氧化碳传感器，一氧化氮传感器，二氧化氮传感器。如用于校正甲烷传感器的10-50%LEL甲烷，氮气或空气平衡气；按客户需求，可以配制包括甲烷、乙烷、丙烷、乙炔、一氧化碳、硫化氢、二氧化硫、氨气（CH4、C2H6、C3H8、C2H2、CO、H2S、SO2、NH3）等2～20个组分的多元标准气。
订货须知：订货请提供气体浓度或爆炸极限的百分比，平衡气种类，钢瓶大小，减压器出口压力，减压器出口类型。
产品包装：4L铝合金钢瓶，8升铝合金钢瓶；40升碳钢瓶。
充装压力：一般情况下9.81MPa，高压气体需减压后使用。
钢瓶阀门：铜镀锌瓶头阀QF-011，W21.8-14R出口；腐蚀性气体需配不锈钢瓶头阀。可按客户需求配制。
标准气减压器：铜质减压器，出口可以是1/4"，3/8"卡套，M16-15等，出口压力表0~1MPa，0~1.6MPa，0~2.5MPa不等，可按客户要求定制。
产品浓度单位：ppm，mol/mol，mg/m3，mol/L等，如50ppm硫化氢，氮气平衡气。
气体传感器的校准：
为了保证气体传感器的精度和系统的完整性，对仪器还需要进行正常运行性流量检查及示值标定。气体传感器是通过目标样品中气体到气体传感器，对被测量气体检测的。日常工作中，可以根据本身具备的环境及条件选择不同的方法进行示值标定，以保证仪器的正常运转，但要对外出具公证数据时，则一定要到计量检定部门按周期检定，以保证仪器的准确性。
其一：选择洁净的空气，对仪器的零点进行标定。此时有害气体的含量应为“零”，而氧的含量则应为20．9％。
其二，选择纯氮，通入氮气氧传感器的显示应迅速下降为0．2mg／m。以下，否则氧传感器失效，而有害气体的显示应为“零”。
其三，选择一定体积质量的被测量标准气体进行标定，按照仪器使用说明书对每个传感器进行一一标定，如果发现示值误差超过说明书给出的技术指标，可通过校准程序或仪器内部电器指标的调整，对仪器进行调整。如果在使用中监测的数据异常偏低，反应非常慢；或在标定过程中发现传感器反应非常慢，线性误差较大，无法调整；或是刚刚调整好，再进行测量数值又发生了变化，则可以考虑更换传感器。
在更换传感器之后，也要对传感器或仪器进行及时反复的标定，调整准确后，才能使用。
总之，科学合理的使用、维护，可有效地延长电化学传感器的寿命，以保证气体传感器的测量准确性。
 
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