目錄:北京中恒日鑫科技有限公司>>日本氣體檢測(cè)管>> 152D日本gastec 152D丁酮?dú)怏w檢測(cè)管2-600ppm
參考價(jià) | 面議 |
參考價(jià) | 面議 |
更新時(shí)間:2024-03-12 21:16:06瀏覽次數(shù):293評(píng)價(jià)
聯(lián)系我們時(shí)請(qǐng)說明是化工儀器網(wǎng)上看到的信息,謝謝!
被動(dòng)擴(kuò)散式檢測(cè)管是用來測(cè)定較長時(shí)間下氣體濃度的時(shí)量平均值(TWA),采用自然擴(kuò)散的方式。 這種檢測(cè)管里面填充有吸附劑及反應(yīng)劑,氣體以一定的速率被均勻吸附,從而出現(xiàn)較為明顯均勻的變色。 檢測(cè)工作場(chǎng)所人員的有害氣體暴露量時(shí),用右圖的檢測(cè)管夾(710)放置在人員衣領(lǐng)處即可。 檢測(cè)有害氣體在工作場(chǎng)所的分布時(shí),把該檢測(cè)管固定放置一段時(shí)間后就可檢測(cè)出來。也可用來進(jìn)行長時(shí)間的檢測(cè)。 | |
特點(diǎn) 簡潔,輕巧,方便多用 直接讀數(shù) 不需取樣設(shè)備 圖例 A-切斷處 B-吸附劑 C-檢測(cè)劑 | 檢測(cè)管夾 No. 710 |
Measuring Range | 2 to 600 ppm |
Sampling Hours | 1 to 10 hours |
Detecting Limit | 2 ppm (10 hours) |
Colour Change | Yellow → Reddish Brown |
Reaction Principle | 3CH3COC2H5+ (NH2OH)3H3PO4 → H3PO4 H3PO4 + base → Phosphate |
Coefficient of Variation | 10% (for 20 to 600 ppm-hr) |
Shelf Life | 2 Years |
Corrections for temperature & humidity | Temperature correction is necessary |
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Substance | Concentration | Interference | Change colour by itself to |
Aldehydes | + | Reddish brown | |
Ketones | + | Reddish brown | |
Acid gases | + | Reddish brown (Unclear demarcation) |
Substance | Correction Factor | Measuring Range |
Acetone | 0.7 | 1.4 to 420 ppm |
Methyl isobutyl ketone | 2.0 | 4 to 1200 ppm |
Acetaldehyde | 0.6 | 1.2 to 360 ppm |
Calibration gas generation | Diffusion tube method |
TLV-TWA | TLV-STEL | Explosive range |
200 ppm(2014) | 300 ppm(2014) | 1.7 to 11.4% |
(空格分隔,最多3個(gè),單個(gè)標(biāo)簽最多10個(gè)字符)