Model 401 NO2 Converter

Model 401 NO₂ Converter™

Model 401

The Model 401 NO2 Converter (above photo, top), when used in combination with the Model 400 Nitric Oxide Monitor (above photo, bottom), allows measurements of NO, NOx (NOx = NO + NO2) and NO2 (as the difference between NOx and NO) in the range 2-2,000 ppb. The NO2 Converter also contains an internal scrubber for scheduled zeroing of the NO Monitor. The NO2 Converter makes use of a molybdenum ("moly") converter heated to 325 °C to reduce NO2 to NO. Frequencies of switching between NO and NOx measurements and zeroing frequencies are chosen from the NO Monitor™ menu. The instrument package may be set to either always measure NO, always measure NOx, or switch back and forth between measurements of NO and NOx at a specified interval (5 min, 15 min or 1 hour). Choices of zeroing frequency are never, continuous, and at 30 min, 1 hour and 4 hour frequencies. Menu choices of NO/NOx and zero measurement frequencies can be customized to your needs.

Specifications

NO2 Conversion Principle	Molybdenum Oxide at 325 °C
Dimensions of Instrument Case	3.8 x 7.5 x 9.5 in. (10 x 19 x 24 cm)
Weight	4.9 lb. (2.2 kg)
Power (specify 110 or 220 VAC)	60 Watt (max); ~30 Watt after warmup
Sample Flow Rate	1 L/min
NO/NOx Sampling Interval Choices	Always NO, Always NOx, 5 min, 15 min, 1 hr (can be customized to your needs)
Zeroing Frequency Choices	Always Off, Always On, 30 min, 1 hr, 4 hr (can be customized to your needs)

To download a brochure describing the Model 401 NO2 Converter™ (PDF format), click on the download icon below.