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| | | P ODUCTS EVIB/V | | |
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| | | SB series | | |
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| | | imensions Fig 5 shows the dimensions of the SB series (standard housing). Configurations Fg 6 shows the configurations of the SB series standard housng and SB-500 with active charcoal filter. Other housing Special sensor housing with an external sntered metal cover is available (example: Fg 7). | | |
| | | Stainless steel mesh | | |
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| | | Heater coil Sensng element | | |
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| | | Lead wire Sensor cover | | |
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| | | Pastic moulding Electrode pin | | |
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| | | The senstivity characteristics of semiconductor gas sensors are shown by the relationship between the sensors resistance ( S and concentration of gases The sensor resistance decreases with an increase of the gas concentration based on a logarithmic function (see page for details of sensing mechanism). The standard test conditions of each model are calibrated to meet a typical target gas and concentration. For example, methane 1000 ppm for flammable gas detection, hydrogen 100 ppm for hydrogen detection or ethanol 300 ppm for solvents detection. If different conditions are required for other specific gas detection, please consult FS Fig below shows the typical sensitivity characteristics data of SB-11B-00. The sensor resistance change is normalized by the s at 1000ppm of isobutane. | | |
| | | 0.8 Scale: mm | | |
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| | | Fig 5. imensions: standard housing | | |
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| | | Fig 6. Configurations: standard housing and SB-50 | | |
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| | | 10 | | |
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| | | 15.0 | | |
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| | | Sntered metal cover | | |
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| | | o o o | | |
| | | Sensor | | |
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| | | 03 £Z 03 13 SI è | | |
| | | o co | | |
| | | Holder FC board FOtting compound | | |
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| | | 0.1 | | |
| | | C/3 C/3 | | |
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| | | bead wire | | |
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| | | 11.2 | | |
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| | | 0.01 | | |
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| | | 10 100 1000 Gas concentration (ppm) Fig . SB-11B-00 for ydrocar ons | | 10000 | | |
| | | Fig 7. SB series with sintered metal housing | | |
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| | | 5 | | |
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