主動式濾毒罐失效感知器研製

Design A Prototype Gas Sensing Device for Air Purifying Respirator

本研究研製一種符合美國職業安全衛生研究所（NIOSH）規範及中華民國國家標準 的主動式濾毒罐失效感知器，此種感知器原型由化學半導體SnO2感測元件，轉接器及電子線路三部份所構成，以44種標準氣體測試結果證實此感知器原型對醇類、酯類、酮類、醛類等25種化合物有良好的感應，實驗顯示在恕限值濃度（PEL）下，此裝置在10秒內會發生警告訊號提醒使用者更換濾毒罐，在此份原型產品中轉接器主要的功用是承接感測元件並連接面罩及濾毒罐。此種設計的好處是不會破壞原有的呼吸防護具；而且此裝置可重覆使用，進而降低使用成本。

A prototype gas sensing device based on the NIOSH standard of Active-End-of-Service-Life Indicator (AESLI) for air purifying respirator was designed. This prototype consists of a tin oxide Sn02 sensor, an adaptor and an electronic circuit. Tests at TLV or lower concentration of 44 chemicals prove that, the sensor is able to detect the concentrations of 25 toxic gases or vapors, including ketones, alcohols, esters, aromatics and alicyclic compounds. Results showed that this device could be activated to generate a warning signal within 10 seconds once the test gas was applied. The adaptor used in the prototype is for housing the sensor and connecting with the cartridge and the respirator. The important features of the AESLI prototype design is that it will not ruin the original respirator and cartridge.