42iQ NO-NO2-NOx Analyzer

Get 24/7 access to your analyzer’s information with a Thermo Scientific™ iQ Series Gas Analyzer. The iQ Series Gas Analyzers are engineered to get smarter over time and help minimize troubleshooting time with a highly precise, yet tough solution. The 42iQ NOx monitoring analyzer provides the same level of performance when measuring nitrogen oxide (NO-NO2-NOx) in the emissions from a source using chemiluminescent technology.

Discover the non-stop intelligence of the iQ Series Gas Analyzer now with a two-year warranty. Our next generation platform of gas analyzers includes:

Predictive Diagnostics

Address problems before they occur with improved serviceability and plug-and-play components. 24/7 access to your analyzer’s information helps minimize troubleshooting time with innovative,  interchangeable DMC modules in a highly precise, yet tough solution.

Proactive Communications

Maintain optimum performance through iQ360 and email alerts. When subscribed to iQ360 service, your instrument communicates directly to our technical support team upon alarm activation. Our technical support team develops a corrective plan and emails it to your staff. Eliminate surprises and take control of your day with the iQ Series Gas Analyzers.

Personal Device Connectivity

Real-time, continuous remote monitoring is now possible with the iQ companion mobile device app. The iQ app allows for remote monitoring of iQ gas analyzers, simplified ways of getting in touch with us, and instant access to both maintenance alerts and product documentation.



Detection Limits0.40 ppb (60 sec. averaging time)
Flow Rate0.6 to 0.8 L/min.
Inputs16 Digital Inputs (TTL), 4 Isolated Voltage Inputs 0 to 10 V
Linearity±1% full scale
Response Time40 sec. (10 sec. average time), 80 sec. (60 sec. average time), 300 sec. (300 sec. average time)
Span Drift±1% full scale (24 hr.)
Temperature (English) Operating32°F to 104°F
Temperature (Metric) Operating0°C to 40°C
Zero Noise0.20 ppb RMS (60 sec. averaging time)
Certifications/ComplianceCE, TUV-SUD Safety, RFNA-1289-074, UKCA
Communication PortsSerial ports:
1 RS-232/485 port
1 RS-485 external accessory port
Other ports:
3 Full speed USB ports (one in front, two in rear)
1 Gigabit ethernet port
Depth (English)24 in.
Depth (Metric)609 mm
Description42iQ NO-NO2-NOx Analyzer
Electrical Requirements100-240 VAC 50/60 Hz, 275 Watts
Height (English)8.72 in.
Height (Metric)221.48 mm
Measurement RangePreset: 0-0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 20 ppm
0-0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50 mg/m3; Extended Ranges: 0-100ppm; 0-150 mg/m^3
Custom Ranges: 0-20ppm; 0-30 mg/m^3
Outputs6 Isolated analog voltages outputs, with 4 selectable ranges
6 Isolated analog current outputs, with 2 selectable ranges
Precision+/-0.4 ppb (500 ppb range)
Weight (English)40 lb.
Weight (Metric)18 kg
Width (English)16.75 in.
Width (Metric)425.45 mm
Zero Drift<0.40 ppb (24 hours)
Unit SizeEach