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Hellma 分光光度計校正標準 666-F4
| 目錄號 | 產品號 | 用途 | 組成 | 材料 | 波長(nm) |
| 666.000 | 666-000 | 檢測波長和光度的精確性 | 666-F1 | Holmium Oxide Glass Filter | 279,361,454,536,638 |
| 666-F2 | Neutral Density Glass filter NG11 | 440;465;546.1;590;635 | |||
| 666-F3 | Neutral Density Glass filter NG5 | 440;465;546.1;590;635 | |||
| 666-F4 | Neutral Density Glass filter NG4 | 440;465;546.1;590;635 | |||
| 666-F0 | Empty Filter Mount | ||||
| 單獨提供 | |||||
| 目錄號 | 產品號 | 用途 | 材料 | 波長（nm） | |
| 666-F1 | 666-000F1-339 | 檢測波長精確性 | Holmium Oxide Glass Filter | 279,361,454,536,638 | |
| 666-F2 | 666-000F2-39 | 檢測波長精確性(吸光率0.25) | Neutral Density Glass filter NG11 | 440;465;546.1;590;635 | |
| 666-F3 | 666-000F3-38 | 檢測波長精確性(吸光率0.5) | Neutral Density Glass filter NG5 | 440;465;546.1;590;635 | |
| 666-F4 | 666-000F4-37 | 檢測波長精確性(吸光率1.0) | Neutral Density Glass filter NG4 | 440;465;546.1;590;635 | |
| 666-F7 | 666-000F7-323 | 檢測波長和光度精確性 | Neutral Density Glass filter BG36 | 270,280,300,320,340,000,000,000,000,000 | |
| 666-F0 | 666-F0-71 | Empty Filter Mount | |||
| 666-F201 | 666-F201-39 | 檢測波長的精確性 (吸光率 0.3) | Neutral Density Glass Filter NG 11 | 440; 465 ; 546.1; 590; 635 | |
| 666-F202 | 666-000F202-36 | 檢測波長的精確性 (吸光率 1.5 ) | Neutral Density Glass Filter NG 3 | 440; 465 ; 546.1; 590; 635 | |
| 666-F203 | 666-000F203-36 | 檢測波長的精確性 (吸光率 2.0) | Neutral Density Glass Filter NG 4 | 440; 465 ; 546.1; 590; 635 |