Ambient NOx Gas Analyzer (CAAQMS)

The Vair-9002 NOx Analyzer accurately measures trace levels of NOx (NO and NO₂) in ambient air simultaneously using the chemiluminescence method.

The O₃ generator in the Vair-9002 is built for long-lasting durability and reliable operation, while the NO₂–NO converter features a high-efficiency cartridge material that achieves nearly 100% conversion efficiency. Temperature control for all critical components—such as the reaction chamber, converter, PMT, and sensors—is managed through integrated, user-friendly software.

All analyzers in the Vair series feature a TFT-LCD touchscreen interface, enabling easy operation and enhanced visualization. Powered by a 32-bit ARM Cortex-M4 processor running on Linux Kernel 2.6, the system ensures exceptional stability and multitasking capability. Additionally, the analyzer includes an automatic zero calibration system (Auto Zero) for consistent accuracy and multiple communication interfaces (Ethernet, RS232, RS485, USB, and analog output) for convenient data access and system integration.

FEATURES

  • Ranges 0-0.1 / 0.5 / 1 ppm, user selectable.
  • 7inch TFT LCD & touch screen interface.
  • Ethernet, RS-232, RS-485 & USB ports.
  • USB interface utilizes for Stored Data Download.
  • Temperature & pressure compensation and Internal zero (optional)
  • In built Data Logger Utilizes NAND-Flash to Store up to 1 year (1min averaged data)

Technical Specifications

Measuring items Nitrogen Oxides(NO/NO2/NOx) in Ambient Air
Model Number Vair - 9002
Measuring method Chemiluminescence method (CLD)
Ranges 0-0.1/0-0.5/0-1 ppm (Selectable)
Lower Detectable Limit Less than 0.5ppb
Repeatability with in ±1 % of span gas concentration
Zero drift Less than 1 ppb
Span drift with in ±1% full scale (1 day)
Response time (95%) Less than 60 seconds (T95)
Linearity with in ±1% full scale
Precision with in 0.2% of reading or 0.5 ppb
Operating temperature 5 - 40°C
Analog output 0-1 V / 0-5V or 4-20mA (optional)
Sample flow rate Stabilized flow control by 800cc/min ± 10% Critical Orifice
Particulate filter 47mm Teflon Filter
Display 7'' inch Graphic LCD
Comport Ethernet, USB2.0, RS-232, RS-485
Internal Data Memory Measuring data (1 min/1 year), operation history, Messages, Alert
Power Requirement 110-140V, 50/60Hz