17 i Ammonia Gas Analyzer

Measure ammonia (NH3) concentrations in ambient air with the Thermo Scientific™ Model 17i Ammonia Analyzer. The Model 17i utilizes chemiluminescence technology for a reaction that produces a characteristic luminescence with intensity proportional to the amount of NO. Highly reliable, this analyzer provides long-term stability.

Key Features:

  • Measurement of NH3 as well as NO, NO
  • Unparalleled sensitivity and selectivity
  • Automatic and manual modes
  • Selectable time constants

Additional Information:

  • 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).

iSeries Advantage:

  • 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



Preset ranges0-0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, and 20 ppm
0-0.1, 0.2, 0.5, 1, 2, 5, 10, 20, and 30 mg/m3
Extended ranges0-0.2, 0.5, 1, 2, 5, 10, 20, 50, and 100 ppm
0-0.5, 1, 2, 5, 10, 20, 50, 100, and 150 mg/m3
Custom ranges0-0.05 to 100 ppm
0-0.1 to 150 mg/m3
Zero noise0.50 ppb RMS (120 second averaging time)
Lower detectable limit1.0 ppb (120 second averaging time)
Zero drift (24 hour)< 1 ppb
Span drift (24 hour)+/-1% full scale
Response time120 seconds (10 second averaging time)
Precision+/-0.4 ppb (500 ppb range)
Linearity+/-1% full scale
Sample flow rate0.6 liters/min.
Operating temperature59° – 95° F (15° – 35°C)
Power requirements100 vac, 115 vac, 220-240 vac +/-10% @ 50/60hz, 300W (analyzer) 600W (converter)
Size and weight16.75″ (W) ´ 8.62″ (H) ´ 23″ (D), 60 lbs. (28 kg)
Analyzer: 29 lbs. (14 kg) converter
OutputsSelectable voltage, RS232/RS485, TCP/IP, 10 Status Relays, and Power Fail Indication (standard).
0-20 or 4-20 mA Isolated Current Output (optional)
Inputs16 Digital inputs (standard), 8 0-10Vdc analog inputs (optional)
Available OptionsTefl on particulate filter, ozone particulate filter, rack mounts, rear extender