Model 202 臭氧分析仪

美国2B公司的Model 202臭氧分析仪基于成熟的紫外吸收技术@254nm，使测量更加，测量范围1ppb100,000ppb(0-100 ppm) 。相对常规仪器，Model 202臭氧分析仪重量轻（2.1 kg），能耗低(12V DC， 0.33 amp，4.0 Watt)，因此适合应用于如下场合：

•    高空测量垂直分布、遥控飞行器RPVS及轻型飞机等场合，在那里对空间及重量有严格限制。
•    需长期检测的偏远地区，用电受严格限制。
•    市区地面基站探测网
•    个人暴露测量，用于环境污染对健康影响的研究
•    环境健康及监测
•    实验室研究，研究材料和组织暴露于臭氧的影响

  Model 202臭氧分析仪被EPA认定为等效测量方法（Federal Equivalent Method /FEM：EQOA-0410-190）。作为的FEM，该仪器可广泛用于各个州和其它检测单位，遵循大气监督40 CFR 58 节，符合洁净空气法则检测标准。

• 车载电源适配器可用于运动中/野外大气化学研究
• 可输入三个模拟信号用于
• 温度、湿度和海拔高度修正(海拔升高1000米产生的误差高达14%!)，随地
  读数；Dew-Line*湿度修正技术克服了传统紫外臭氧分析仪的限制，使得湿度
  对臭氧测量的干扰从高达近百个ppb降低到可以接受的几个ppb的水平
• 动态的线性量程：1.5 ppbv到250ppmv，自动换挡，ppb单位显示
• 精度和度：优于1.5 ppbv 或2%的读数取大者；分辨率0.1ppb
• 测量间隔：10 秒(平均选项：10s，1 min，5 min，1 hr)
• 流量率：约1 L/min
• 数据储存：20480行(每10s 储存一个数据平均可达到2.4天，每5分钟可达2.4 月)
• 数据输出：RS-232/USB，0～2.5V DC 模拟，LCD显示
• 数据输入：3 通道，0～2.5 V DC
• 电源：12 V DC，4.0 W (2.9 W 低功耗模式下)
• 5种单位显示，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/year
  Sensitivity Drift	<1%/day <3%/year
  Measurement Time, Frequency	10 s, 0.1 Hz
  Response Time, 100% 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 Pack	12 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