供應(yīng)Model211免擦洗紫外臭氧分析儀

Model 211免擦洗紫外臭氧分析儀:


The new Model 212 Scrubberless Ozone Monitor uses the proven ultriolet (UV) absorption method with an innovative gas-phase scrubber technology to measure ozone virtually free from interferences. In the reference mode, the instrument uses the reaction between ozone and nitric oxide (NO) to selectively remove ozone from the sample. This reaction is orders of magnitude faster than with any other ambient gas, resulting in the removal of only ozone and not potentially interfering compounds that absorb UV light. The instrument is ideally suited for measurements of ozone in heily polluted air where interference is likely from particulates, mercury, or VOCs. The ozone monitor combines the stability of our proven dual beam ozone monitors with our selective scrubber technology to provide accurate ozone measurements in the most polluted air.
The gas-phase scrubber technology uses NO to quantitatively react with ozone and remove it from the sample. This reaction has long been used as a gas phase titration for the measurement of either NO or O₃. In the Scrubberless Ozone Monitor, a low conceation of NO is added to the sample to generate ozone-free, reference air. The light intensity is measured in the reference and sample modes, and the conceation of ozone is calculated directly from Beers Law. Nitric oxide can be supplied from an external NO cylinder and will provide over a year of gas supply. Alternatively, nitric oxide can be generated inside the instrument using an optional photolytic NO generator and an external cylinder of nitrous oxide (N₂O), which is non-toxic, non-corrosive and relatively inexpensive.
All 2B Tech ambient air monitors offer remote instrument operation via RS-232, choice of eraging time (2 s to 1 hr), analog output (0-2.5 V), current output (4-20 mA), internal data logger, and optional flash memory. Our data display and graphing software allows continuous display of data which can be sed for offline analysis
Features

• Virtually interference-free measurement of ambient ozone
• Free of signal quenching interferences inherent to chemiluminescence methods
• DewLine? for elimination of water vapor interference, a unique feature of 2B Tech instruments
• Inexpensive, simple, and robust instrument design in a 19” rack mount enclosure
• Touchscreen display
• Internal data logger and USB flash memory
• Dual beam optical bench with high precision
• Stable calibration (calibration suggested annually)
• Electronic sample and nitric oxide flow cool
• Internal long-life sample pump
• Under evaluation as a Federal Equivalent Method (FEM)
• Convenient user interface, including remote operation via RS-232 communication
• Optional internal NO generator using non-toxic, noncorrosive nitrous oxide (N₂O)

Options

• GPS for continuous logging of latitude, longitude and altitude
• External particle filter

Specifications

Measurement Principle	UV Absorption at 254 nm; Dual Beam
Linear Dynamic Range	0.5 ppb to 2.0 ppm
Resolution	0.1 ppb
Precision (1σ; rms noise)	Greater of 0.5 ppb or 1% of reg for 10-s erage
Accuracy	Greater of 1.0 ppb or 2% of reg
Limit of Detection (2σ)	1.0 ppb
NIST-Traceable Calibration	Yes
Flow Rate (nominal)	~2 Liter/min
Flow Rate Requirement	>1.2 L/min
Baseline Drift	<1 ppb/day <3 ppb/year
Sensitivity Drift	<0.5%/day <3%/year
Measurement Time, Frequency	2 s, 0.5 Hz
Response Time, of Step Change	4 s for 2-s eraging; 20 s for 10-s eraging
eraging Times	2 s, 10 s, 1 min, 5 min, 1 hr
Internal Data Logger Capacity	14,336 lines (10 s g. = 1.4 days; 1 min g = 10 days; 5 min g = 1.4 mo; 1 hr g = 1.6 yr); Virtually unlimited capacity with USB Flash Drive
Ozone Units	ppb, ppm, pphm, ?g m-3, mg m-3
Pressure Units	mbar, torr
Temperature Units	°C, K
T and P Corrected	Yes
Operating Temperature Range	10 to 50 °C
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, 1.1 A at 12 V, 13 watt; 8 watt with Touch Screen off
Size	Rackmount: 17" w x 14.5" d x 5.5" h (43 x 37 x 14 cm)
Weight	14.3 lb (6.5 kg)
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	Touch Screen Display, USB, RS232, 0-2.5 V Analog, Optional 4-20 mA Analog
Data Transfer Baud Rates	1200, 2400, 4800, 19200
Output Ranges	User Defined Scaling Factor in Menu
DewLine?	Yes
Long Life Pump	Yes, 20,000 hr
Flow Meter	Yes
Options	GPS, Lamp Heater; Bluetooth for wireless data transmission

System Includes

• Model 211 Scrubberless Ozone Monitor
• AC Power Adapter (100-240 VAC to 12 VDC) with Couy-Specific Plug
• Zeroing Cartridge
• Operation Manual on CD
• Calibration Data and NIST-Traceable Calibration Certificate
• Instrument Birth Certificate
• One Year Warranty