產(chǎn)品詳情
簡單介紹：
甲胺CH3NH2檢測管3DL，GASTEC甲胺CH3NH2檢測管3DL檢測范圍1-10ppm，檢測管檢測時間在1-10小時左右。甲胺CH3NH2檢測管3DL 采用自然擴散的方式。甲胺CH3NH2檢測管3DL其特點：簡潔，輕巧，方便多用、直接讀數(shù)、不需取樣設(shè)備
詳情介紹：
甲胺CH3NH2檢測管3DL
甲胺CH3NH2檢測管3DL，GASTEC甲胺CH3NH2檢測管3DL檢測范圍1-10ppm，檢測管檢測時間在1-10小時左右。甲胺CH3NH2檢測管3DL 采用自然擴散的方式。甲胺CH3NH2檢測管3DL其特點：簡潔，輕巧，方便多用、直接讀數(shù)、不需取樣設(shè)備。
被動擴散式檢測管是用來測定較長時間下氣體濃度的時量平均值（TWA），采用自然擴散的方式。
這種檢測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
這種檢測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
檢測工作場所人員的有害氣體暴露量時，用右圖的檢測管夾（710）放置在人員衣領(lǐng)處即可。
檢測有害氣體在工作場所的分布時，把該檢測管固定放置一段時間后就可檢測出來。也可用來進行更長時間的檢測
檢測有害氣體在工作場所的分布時，把該檢測管固定放置一段時間后就可檢測出來。也可用來進行更長時間的檢測
Ammonia | NO.3DL |
| NH3 |
 |
Performance
| Measuring Range | 0.1 to 10 ppm |
| Sampling Hours | 1 to10 hours |
| Detecting Limit | 0.02 ppm (10 hours) |
| Colour Change | Pink → Yellow |
| Reaction Principle | 2NH3 + H2SO4 → (NH4)2SO4 |
| Coefficient of Variation | 10% (for 1 to 10 ppm-hr) |
| Shelf Life | 2 Years |
| Corrections for temperature & humidity | Temperature and Humidity correction is necessary |
| Store the tubes at cool and dark place. | |
Possible coexisting substances and their interferences
| Substance | Concentration | Interference | Change colour by itself to |
| Amines | + | Yellow | |
| Hydrazine | + | Yellow |
Other substance measurable with this detector tube
| Substance | Correction Factor | Sampling Time | Measuring Range |
| Methyl amine | 1.9 | 0.19 to 19 ppm | 1 to 10 hours |
| Trimethyl amine | 2.3 | 0.23 to 23 ppm | 1 to 10 hours |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | 35 ppm | 15 to 28% |