POMTM,袖珍式紫外臭氧分析儀
下一步的以UV為基礎(chǔ)的臭氧檢測(cè)儀的已經(jīng)小型化。此款POM臭氧檢測(cè)儀尺寸為4英寸×3英寸×1.5英寸，僅重0.75磅（340克）。由于本機(jī)有內(nèi)置的GPS裝置，因此臭氧檢測(cè)值以及其地理位置數(shù)據(jù)能同時(shí)得到持續(xù)不斷地存儲(chǔ)。通過(guò)把它的光程折疊成“U”型，POM能有和Models 202，205，以及106-L一樣長(zhǎng)的光程，那么它就有如同這幾款臭氧檢測(cè)儀一樣的度（~2ppb）。
檢測(cè)原理 254nm紫外吸收
檢測(cè)范圍 2.0ppb-10ppm
分辨率 0.1ppb
度 優(yōu)于2.0ppb或2%
檢測(cè)下限 4.0ppb
NIST可溯源的校準(zhǔn) 是
檢測(cè)間隔 10秒 (數(shù)據(jù)選項(xiàng): 10 秒， 1 分鐘， 5 分鐘，1小時(shí))
流量 ~0.8升/分鐘
流量要求 大于0.5升/分鐘
基線漂移 <2ppb/天 <5ppb/年
靈敏度漂移 <1%/天 <3%/年
測(cè)量時(shí)間和頻率 10s，0.1Hz
反應(yīng)時(shí)間 20秒
的步長(zhǎng) 2個(gè)點(diǎn)
平均次數(shù) 10秒，1分鐘，5分鐘，1小時(shí)
數(shù)據(jù)保存 8219行(10 秒平均每天；1 分鐘 平均每星期； 5 分鐘平均每月； 1小時(shí)平均每年)
臭氧單位 ppb，ppm，pphm，ug m-3，mg m-3
壓力單位 Mbar，torr
溫度單位 ℃，K
工作溫度 0-50℃
電源要求 110/220V 交流電或電源組支持 7-24V直流電，一般250mA(12V)，3.0watt
外部電池 7.4 V， 1.6 A/小時(shí)， 鋰聚合物電池， 5-8 小時(shí)
尺寸 4.0 x 3.0 x 1.5 英尺 (10.2 x 7.6 x 3.8 cm)
重量 0.75 磅 (0.34 千克)
數(shù)據(jù)傳輸波特率 19200
Dewline 是
2B Tech has taken the next step in miniaturization of UV-based ozone monitors by developing the Personal Ozone Monitor or "POM". The POM has dimensions of 4 x 3 x 1.5 inches and weighs only 0.75 lb (340 g). It has a built in GPS so that ozone measurements may be logged continuously along with geographic location. By folding the optical path in the shape of a "U", it was possible to achieve the same path length in the POM as in the Models 202, 205 and 106-L and thus have similar precision and accuracy (~2 ppb).
- Personal exposure monitoring for studies of health effects of air pollutants
- Health and safety monitoring at industrial sites using ozone
- Vertical profiling using balloons, kites, RPVs and light aircraft where space and weight are highly limited
- Long-term monitoring at remote locations where power is highly limited
- Urban arrays of ground-based detectors
Specifications
| Measurement Principle | UV Absorption at 254 nm |
| Linear Dynamic Range | 2.0 ppb to 10 ppm |
| Resolution | 0.1 ppb |
| Precision (1σ; rms noise) | Greater of 2.0 ppb or 2% of reading |
| Accuracy | Greater of 2.0 ppb or 2% of reading |
| Limit of Detection (2σ) | 4.0 ppb |
| NIST-Traceable Calibration | Yes |
| Measurement Interval | 10 s (Data averaging options: 10 s, 1 min, 5 min, 1 hr) |
| Flow Rate (nominal) | ~0.8 Liter/min |
| Flow Rate Requirement | >0.5 L/min |
| Baseline Drift | <2 ppb/day |
| Sensitivity Drift | <1%/day |
| Measurement Time, Frequency | 10 s, 0.1 Hz |
| Response Time, 99% of Step Change | 20 s, 2 points |
| Averaging Times | 10 s, 1 min, 5 min, 1 hr |
| Data Storage | 8,192 lines (10 s avg ~1 day; 1 min avg ~1 wk; 5 min ~1 mo; 1 hr avg ~1 yr) |
| Ozone Units | ppb, ppm, pphm, µg m-3, mg m-3 |
| Pressure Units | mbar, torr |
| Temperature Units | °C, K |
| T and P Corrected | Yes |
| Operating Temperature Range | 0 to 50 °C |
| Power Requirement; Supplied by battery or 110/220 VAC Power Pack | 7-24 V dc, nominally 250 mA at 12 V, 3.0 watt |
| External Battery | 7.4 Volt, 1.6 amp hour, Lithium Polymer Battery, 5-8 hr |
| Size | 4.0 x 3.0 x 1.5 inches (10.2 x 7.6 x 3.8 cm) |
| Weight | 0.75 lb (0.34 kg) |
| Data Transfer Baud Rate | 19200 |
| DewLine™ | Yes |
| GPS | Yes |
