Checky Melissa, Frankel Kevin, Goddard Denise, Johnson Erik, Thomas J Christopher, Zelinsky Maria, Javner Cassidy
a Personal Safety Division, 3M , St. Paul , Minnesota.
b Shakopee High School (Teachers Working in Science and Technology at 3M) , Shakopee , Minnesota.
J Occup Environ Hyg. 2016;13(2):112-20. doi: 10.1080/15459624.2015.1091956.
A passive visual end of service life indicator (ESLI) for certain organic vapors has been attached to the inside wall of an organic vapor respirator cartridge. The opposite side of the ESLI touches activated carbon inside the cartridge. During use, organic vapors moving through the cartridge adsorb into both the carbon and the ESLI. The cartridge body is clear so that when vapor concentrations meet a certain threshold, the user may observe the progressive development of an indicator bar down the side of the ESLI. The cartridge is deemed ready to change when any part of the indicator bar touches a marked end line. The performance of the ESLI was observed when the cartridge was tested against a variety of organic vapors, exposure concentrations above the minimum indication level, humidities, temperatures, flow rates, and mixtures. In all cases, the ESLI indicated end of service life with more than 10% cartridge service life remaining (which is a NIOSH test criteria). The results were also compared to mathematical predictions of cartridge service life.
一种用于某些有机蒸气的被动式视觉使用寿命指示器（ESLI）已附着在有机蒸气呼吸器滤毒罐的内壁上。ESLI的另一侧与滤毒罐内的活性炭接触。在使用过程中，通过滤毒罐的有机蒸气会吸附到碳和ESLI中。滤毒罐主体是透明的，这样当蒸气浓度达到一定阈值时，用户可以观察到ESLI侧面指示器条的逐渐形成。当指示器条的任何部分接触到标记的终点线时，就认为滤毒罐需要更换了。当对滤毒罐进行各种有机蒸气、高于最低指示水平的暴露浓度、湿度、温度、流速和混合物的测试时，观察了ESLI的性能。在所有情况下，ESLI都能在滤毒罐剩余超过10%使用寿命时指示使用寿命结束（这是美国国家职业安全与健康研究所的测试标准）。结果还与滤毒罐使用寿命的数学预测进行了比较。
