Model 405 nm NO2/NO/NOx Monitor

  • Measurement of NO2over the range 0-10 ppm; measurement of NO over the range 0-2 ppm
  • Federal Equivalent Method (FEM) for NO2over the ranges 0-500 ppb and 20-30°C (EQNA-0217-243)
  • Measurement frequency of once every five seconds, with selectable averaging times of 1 min, 5 min, and 1 hour
  • Three measurement modes: NO2only; NO only; or NO, NO2, and NOx
  • SD card for virtually unlimited, portable data logging
  • Power consumption: ~16 watts after warmup
  • Long-Life pump (~15,000 hours)
  • DewLine for elimination of any water vapor interference, a unique feature of 2B Tech instruments

Certifications

US EPA Federal Equivalent Method (FEM) for NO2 (0-500 ppb, 20-30°C)

CE

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 0-40°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

LCD; RS232; SD card; 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); touchscreen; side panels with mounting ears for easy installation into instrument rack

 

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.

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