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Location: Summerfield, Florida, United States
Ships to: US,
Item: 185408173620

Condition:Used An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections. See all condition definitionsopens in a new window or tab
Seller Notes:“Excellent functional condition. Only 574 total run hours! Sold with warranty.”
2B Technologies:2B Technologies
MPN:405NM

eBay 2B Technologies Model 405 NM NO2 NO NOx Monitor Only 574 Total Hours – 120 Volts 2B Technologies Model 405 NM NO2 NO NOx Monitor Only 574 Total Hours – 120 Volts Web Information The Model 405 nm NOx Monitor (“nm” for “nanometer” and for “NOx Monitor”) is designed for the direct measurement of atmospheric nitrogen dioxide (NO2), nitric oxide (NO) and total reactive oxides of nitrogen (NOx = NO + NO2) in the concentration range 0-10,000 ppb (0-10 ppm) for NO2 and 0-2,000 ppb (0-2 ppm) for NO with high precision and accuracy. In this instrument NO2 is measured directly by absorbance at 405 nm. NO is measured by selective conversion with ~100% efficiency using the highly selective reaction of NO with ozone (O3). Total NOx is obtained by addition of NO and NO2. Unlike chemiluminescence instruments where NO2 must be converted to NO using either a molybdenum or photolytic converter with highly variable efficiency, in the Model 405 NOx Monitor nitrogen dioxide is measured directly by absorbance, analogous to an ozone monitor. Because NO2 has a much lower absorption cross section than ozone, a folded cell with corner mirrors is used to produce a long absorbance path of ~2 m to achieve approximately the same sensitivity for NO2 as we do for ozone in our UV-based-absorbance monitors. The wavelength of 405 nm was chosen because no other species found in ambient air has significant absorbance at that wavelength, making the Model 405 nm extremely selective for NO2. Although our Model 410 Nitric Oxide Monitor can measure NO and NOx when used in combination with our Model 401 NO2 Converter, the Model 405 nm is the preferred method for NO2 because it is a direct method and requires less power, while providing an accurate measurement of NO as well. The Model 405 nm NO2/NO/NOx Monitor is designated by the U.S. Environmental Protection Agency as a Federal Equivalent Method (FEM) for NO2 compliance monitoring and is QAL1 certified by TÜV Rheinland as conforming to European Standards EN-15267 and -14211. SD card data logging is now a standard feature. Theory of Operation The following figure is a simplified schematic diagram of the Model 405 nm NOx Monitor. Sample air is continuously drawn through the instrument by an air pump at a flow rate of ~1.5 L/min. The Scrubber Valve alternately bypasses and sends the sample air through a NO2 scrubber to remove all NO2 in the sample, thus allowing the measurement of a light intensity in the absence (Io) of NO2 and presence (I) of NO2. The Beer-Lambert Law is then used to calculate the concentration of NO2 from I and Io. Nitric oxide is measured by bypassing the NO2 Scrubber and measuring the light intensity while adding (I) or not adding (Io) ozone to convert NO to NO2 according to the reaction:. NO + O3 → NO2 + O2 As in our ozone monitors, a Nafion tube is used to equilibrate humidity during I and Io measurements, so that any water vapor interference due to refractive effects is eliminated. NOx is obtained by adding the measurements of NO2 and NO. The instrument may be operated in continuous NO2, NO or NOx mode, or in a mode where NO2 and NO are alternately measured, once every 20 seconds. We recently published a paper in Atmospheric Measurement Techniques describing our patented folded tubular photometer and its application in the Model 405 nm NO2/NO/NOx Monitor. Applications The Model 405 nm NO2/NO/NOx Monitor is ideal for applications that require precise and accurate measurement of NO and NO2, such as air quality monitoring both outdoors and indoors. Its portability and relatively low power consumption make it particularly well suited for field deployments. Specifications Certifications US EPA Federal Equivalent Method (FEM) for NO2 (0-500 ppb, 20-30°C), EQNA-0217-243. QAL1 Certified by TÜV Rheinland for European standards EN15267 and EN 14211, certificate 0000062070. Principle of Measurement Direct absorbance of NO2 at 405 nm Measurement Modes NO2 only; NO only; NO2, NO and NOx Linear Dynamic Range 0-10,000 ppb (0-10 ppm) for NO2; 0-2,000 ppb (0-2 ppm) for NO (FEM approved for 0-500 ppb NO2 for 20-30°C) Resolution 0.1 ppb Precision (1σ rms noise) < 0.5 ppb or 0.5% of reading (with adaptive filter1) Accuracy Greater of 2 ppb or 2% of reading Limit of Detection (2σ) < 1 ppb (with adaptive filter1) Flow Rate (nominal) 1.5 Liter/min Flow Rate Requirement Minimum: 1.4 Liter/min; Maximum: 1.6 Liter/min Response Time, 100% of Step Change 10 s for 5-s averaging 20 s with adaptive filter1 Measurement Frequency 0.2 Hz (once every 5 s) Averaging Times 5 s, 1 min, 5 min, 1 hr SD Card Logger Capacity Minimum 2 GB (> 2-year capacity for 5-s measurement mode) Internal Data Logger Capacity 8,192 data lines (5-s avg = 0.47 days; 1-min avg = 5.7 days; 5-min avg = 1.0 mo; 1-hr avg = 0.94 yr) Concentration Units ppb, ppm, pphm Pressure Units mbar Temperature Units °C T and P Corrected Yes Operating Temperature Range 10 to 50°C (FEM approved for 20-30°C for NO2) Power Requirement; Supplied by 5-amp 110/220 VAC Power Pack (provided) or Battery 11-14 V dc or 120/240 V ac, 1.4 A at 12 V, 17 watt Max: 2.9 A at 12 V, 35 watt (warmup) Size Rackmount: 17″ w x 14.5″ d x 5.5″ h (43 x 37 x 14 cm) Weight 18.6 lb (8.4 kg) Data Outputs RS232; 0-2.5 V Analog Outputs for NO and for NO2 Data Transfer Baud Rates 2400, 4800, 19200 Output Ranges User-Defined Scaling Factor in Menu DewLine™ Yes Long-Life Pump Yes: 15,000 hr, 1.7 yr of continuous operation Flow Meter Yes Options Bluetooth for wireless data transmission; USB output (in place of RS232) 1An adaptive filter may be selected from the menu, making signal averaging similar to competing NOx monitors. Specifications above are for default parameters: Change Difference = 40 ppb, Change Percent = 10%, Short Filter = 4 pts (20 s), Long Filter = 36 pts (3 min). Adaptive filter parameters may be adjusted by the user. Condition Excellent condition — only 574 total run time! Includes 2B Technologies Model 405 NM NO2 NO NOx Monitor Operation manual Power Cord EV16 Warranty 30 Day warranty. We pledge to offer the best service and warranty to all of our customers! We are extending a 30 Day warranty on this item. This is our way of saying thank you for allowing us to serve you. Certification This is a genuine product from this manufacturer. Disclaimer The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. the item is subject to FDA regulation, we will verify your status as an authorized purchaser of this item before shipping of the item.” Regardless of the origin of the equipment, documentation provided or identification appearing upon the equipment, the equipment described and offered here is in no way certified for, recommended for, or offered for any specific use. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental or consequential, associated in any way with the equipment. The purchaser, by bidding on this equipment, indicates their acknowledgment of, and agreement to the terms of this disclaimer. it is the purchaser’s responsibility to have the item inspected and certified by a qualified professional before use!

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