摘要: Two electronic circuit developments are described for use in portable air sampling systems for industrial hygiene monitoring. The first development described is a motor speed controller,applicable to air moving systems involving a... 展开
| 作者 | almich,bruce p. rubenzahl, moe a. | ||
|---|---|---|---|
| 原报告号 | PB267450 | 总页数 | 38 |
| 报告类别/文献类型 | PB / NTIS科技报告 | ||
| 关键词 | circuits gas detectors particlesportable instruments chemical analysis design criteria performance evaluation sampling aerosols electrochemistry nickel cadmium batteries gas analysis industrial hygiene | ||
