呼吸防護具直讀式防護係數測試系統之研發

Development of Direct-Reading Device for the Protection Factor of Respirator

本研究的宗旨為發展一套可以對呼吸防護具「模擬工作場所防護係數」（Simulated Workplace Protection Factor， SWPF） 進行現場即時量測的測試裝置。該裝置係使用二氧化錫（SnO2）乙醇感測元件、資料擷取裝置及半罩式呼吸防護具等部分所組裝建立。此裝置能每秒鐘同時擷取防護具內側與外側氣體的濃度，計算並且顯示防護具的防護係數。測試人員穿戴此裝置並且暴露在低濃度的乙醇氣體中進行測試，以模擬工作現場。實測結果顯示此裝置可以量測防護具SWPF 在 20 至1500 之間的變化。

A device was developed for in-situ real-time measurement of simulated workplace protection factor (SWPF) of respirator cartridges. It is composed of a tin dioxide (SnO2) sensor, a data logger, and a half-mask. With this device, gas concentration data both inside and outside the respirator are collected by an acquisition system every second. The collected data could be calculated to obtain protection factor of gas cartridge. To simulate workplace conditions, a man wearing this device was exposed to low ethanol concentration. The results show that this system is suitable for gas cartridges with SWPF within 20 to 1,500 and responds to SWPF variations promptly.