Ambient SO2 Gas Analyzer

Understanding Ambient SO₂ Gas Analyzers: Benefits, Functionality, and Applications Introduction to Ambient SO₂ Gas Analyzer

The Vair-9000 SO₂ Analyzer accurately measures low concentrations of sulfur dioxide (SO₂) in ambient air using the UV fluorescence method. It features a long-life UV lamp with minimal sensitivity drift and a built-in hydrocarbon (HC) remover to eliminate interference. A special coating inside the sample cell and tubing prevents gas adhesion, enhancing detection limits and precision.

All analyzers in the Vair series include a TFT-LCD touchscreen interface for easy operation and clear visualization. Powered by a 32-bit ARM Cortex-M4 processor running on a Linux Kernel 2.6, the system ensures exceptional stability and multitasking performance. Additional features include auto-zero calibration for accurate measurements and multiple connectivity options (Ethernet, RS232, RS485, USB, Analog output) for flexible 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 compenstion and internal zero (optional)
  • In built Data Logger Utilizes NAND-Flash to Store up to 1year (1 min averaged data)

Technical Specifications

Measuring items Sulfur Dioxide (SO₂) in ambient air
Model Number Vair - 9001
Measuring method Ultraviolet Fluoresce Method (UVF)
Ranges 0-0.1/0-0.5/0-1 ppm (Selectable)
Lower Detectable Limit Less than 0.5 ppb
Repeatability with in ±1 % of span gas concentration
Zero drift Less than 2 ppb
Span drift with in ±1% full scale (1 day)
Response time (95%) Less than 90 seconds (T95)
Linearity with in ±1% full scale
Precision 0.5% of reading or 1 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