Reaction produces a characteristic luminescence with intensity proportional to the amount of NO. The Model 17i has three modes of operation: NO, NOx, and Nt. 
Measurement of NH3 as well as NO, NO
Unparalleled sensitivity and selectivity
Automatic and manual modes
Selectable time constants
While operating in the NO mode, the sample is mixed with Ozone in the reaction chamber. This reaction produces a characteristic luminescence with intensity proportional to the concentration of NO.
In the NOx mode, the sample is passed through a molybdenum converter which reduces any NO2 in the sample to NO. This is then transported to the reaction chamber where the sample is measured as NOx (NO + NO2).
In the third mode, the sample is passed through a stainless steel converter where both the NO2 and the NH3 are converted to NO. This is then measured as Nt (NO + NO2+ NH3).
Ethernet connectivity for efficient remote access
Enhanced user interface with one button programming and large display screen
Flash memory for increased data storage and user downloadable software
Enhanced electronics design optimizes product commonality
Improved layout for easier accessibility to components
Choose from the following configurations/options to customize.
Voltage options:
  A: 115VAC 60Hz (standard)
  B: 220VAC 50Hz
  C: 220VAC 60Hz
  E: 115VAC 50Hz
  J = 100VAC, 50/60Hz
Internal zero/span:
  N: No zero / span assembly (standard)
  Z: Internal zero span assembly
Ozone handling:
  D: Drierite scrubber (standard)
  P: Permeation dryer
Optional I/O:
  A: None (standard)
  C: I/O expansion board (4 to 20mA outputs - 6 channels, 0 to 10V inputs - 8 channels)
Mounting Hardware:
  A: Bench mounting (standard)
  B: Ears and handles, EIA
  C: Ears and handles, Retrofit
Compliance: ETL, CSA, UL, CE