美國(guó)2B公司的Model 202臭氧分析儀基于成熟的紫外吸收技術(shù)@254nm，使測(cè)量更加，測(cè)量范圍1ppb至100,000ppb(0-100 ppm) 。相對(duì)常規(guī)儀器，Model 202臭氧分析儀重量輕（2.1 kg），能耗低(12V DC， 0.33 amp，4.0 Watt)，因此適合應(yīng)用于如下場(chǎng)合：
- 高空測(cè)量垂直分布、遙控飛行器RPVS及輕型飛機(jī)等場(chǎng)合，在那里對(duì)空間及重量有嚴(yán)格限制。
- 需長(zhǎng)期檢測(cè)的偏遠(yuǎn)地區(qū)，用電受嚴(yán)格限制。
- 市區(qū)地面基站探測(cè)網(wǎng)
- 個(gè)人暴露測(cè)量，用于環(huán)境污染對(duì)健康影響的研究
- 環(huán)境健康及安全監(jiān)測(cè)
- 實(shí)驗(yàn)室研究，研究材料和組織暴露于臭氧的影響
Model 202臭氧分析儀被EPA認(rèn)定為等效測(cè)量方法（Federal Equivalent Method /FEM：EQOA-0410-190）。作為的FEM，該儀器可廣泛用于各個(gè)州和其它檢測(cè)機(jī)構(gòu)，遵循大氣質(zhì)量監(jiān)督40 CFR 58 節(jié)，符合潔凈空氣法則檢測(cè)標(biāo)準(zhǔn)。
- 車載電源適配器可用于運(yùn)動(dòng)中/野外大氣化學(xué)研究
- 可輸入三個(gè)模擬信號(hào)用于科學(xué)研究
- 溫度、濕度和海拔高度修正(海拔升高1000米產(chǎn)生的誤差高達(dá)14%!)，隨時(shí)隨地確保
讀數(shù)；Dew-Line*濕度修正技術(shù)克服了傳統(tǒng)紫外臭氧分析儀的限制，使得濕度
對(duì)臭氧測(cè)量的干擾從高達(dá)近百個(gè)ppb降低到可以接受的幾個(gè)ppb的水平 - 動(dòng)態(tài)的線性量程：1.5 ppbv到250ppmv，自動(dòng)換擋，ppb單位顯示
- 精度和準(zhǔn)確度：優(yōu)于1.5 ppbv 或2%的讀數(shù)取大者；分辨率0.1ppb
- 測(cè)量間隔：10 秒(平均選項(xiàng)：10s，1 min，5 min，1 hr)
- 流量率：約1 L/min
- 數(shù)據(jù)儲(chǔ)存：20480行(每10s 儲(chǔ)存一個(gè)數(shù)據(jù)平均可達(dá)到2.4天，每5分鐘可達(dá)2.4 月)
- 數(shù)據(jù)輸出：RS-232/USB，0～2.5V DC 模擬，LCD顯示
- 數(shù)據(jù)輸入：3 通道，0～2.5 V DC
- 電源：12 V DC，4.0 W (2.9 W 低功耗模式下)
- 5種單位顯示，ppm，ppb，pphm，g/Nm3，μg/m3
The 2B Technologies Model 202 Ozone Monitor™ is designed to enable accurate and precise measurements of ozone ranging from low ppb (precision of ~1 ppb) up to 100,000 ppb (0-100 ppm) based on the well established technique of absorption of UV light at 254 nm. The Model 202 Ozone Monitor™ is light weight (4.7 lb., 2.1 kg.) and has a low power consumption (12V DC, 0.33 amp, 4.0 Watt) relative to conventional instruments and is therefore well suited for applications such as:
- 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
- Personal exposure monitoring for studies of health effects of air pollutants
- Environmental health and safety monitoring
- Laboratory studies of the effects of ozone exposure on materials and organisms
The Model 202 has been designated by the EPA as a Federal Equivalent Method (FEM): EQOA-0410-190.
Options
- Flash Card Memory for virtually unlimited, portable data storage
- GPS for continuous logging of latitude, longitude and altitude
- Rechargeable metal hydride battery provides 12 hr of continuous operation
- External particle filter
- Serial-to-USB adapter
- Rotary vane air pump for low temperature and quiet operation
- External air pump for long pump life
Specifications
Measurement Principle UV Absorption at 254 nm Linear Dynamic Range 1.5 ppb to 250 ppm Resolution 0.1 ppb Precision (1σ; rms noise) Greater of 1.5 ppb or 2% of reading Accuracy Greater of 1.5 ppb or 2% of reading Limit of Detection (2σ) 3.0 ppb NIST-Traceable Calibration Yes Measurement Interval 10 s (Data averaging options: 10 s, 1 min, 5 min, 1 hr) Flow Rate (nominal) ~1 Liter/min Flow Rate Requirement >0.6 L/min Baseline Drift <2 ppb/day
<5 ppb/yearSensitivity Drift <1%/day
<3%/yearMeasurement 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 Logger Capacity 14,336 lines (10 s avg. = 1.4 days; 1 min avg = 10 days; 5 min avg = 1.4 mo;
1 hr avg = 1.6 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; -20 to 50 °C with low temperature modifications (rotary vane pump and lamp heater) Operating Altitude Range ~0-30 km (~30-1000 mbar) Power Requirement;
Supplied by battery or 110/220 VAC Power Pack12 V dc or 120/240 V ac, 335 mA, 4.0 watt (2.9 watt with cell heater unplugged) Size 3.5 x 8.5 x 11 inches (9 x 21 x 29 cm) Weight 4.7 lb (2.1 kg); 1.6 lb (0.7 kg) without instrument case Analog Inputs for Internal Logging of Other Instruments 3 Analog Inputs, 0-2.5 V; For example could log external T, P and RH Data Outputs RS232, 0-2.5 V Analog, LCD Display: (Optional 4-20 mA Current, External USB Converter; request quote) Data Transfer Baud Rates 1200, 2400, 4800, 19200 Output Ranges User Defined Scaling Factor in Menu DewLine™ Yes Backup Air Pump Yes Flow Meter Yes Options GPS, Flash Card Memory, 4-20 mA Current Output; Lamp Heater; Rotary Vane Air Pump; Long-Life External Air Pump; Rack Mount Case Upgradable to Model 205 Dual Beam Yes
