Description
The PureAire Universal Sulfur Dioxide (SO2) Gas Detector is a fixed gas monitoring system designed for continuous sulfur dioxide detection in power generation, pulp and paper mills, chemical processing, food and beverage production, and other locations where sulfur dioxide gas may be present.
This Sulfur Dioxide Gas Detector is available in 0–15 ppm and 0–20 ppm detection ranges, allowing the appropriate measurement range to be selected for the application. The PureAire Universal Gas Detector provides continuous, real-time sulfur dioxide monitoring for facility and personnel safety applications.
The monitor features a local digital display, built-in audible alarm, visual alarm indicators, two adjustable alarm relays, and an active 4–20 mA output for integration with PLCs, facility monitoring systems, ventilation equipment, remote alarms, and other safety systems.
Because sulfur dioxide can present a hazard at elevated concentrations, continuous fixed monitoring with local alarms and 4–20 mA integration can provide early warning as concentrations increase.
Gas: Sulfur Dioxide (SO2)
Available Detection Ranges: 0–15 ppm and 0–20 ppm
Monitor Platform: PureAire Universal Gas Detector
- Continuous sulfur dioxide (SO2) gas monitoring
- 0–15 ppm and 0–20 ppm detection ranges available
- Local digital concentration display
- Built-in audible alarm
- Visual alarm indicators
- Two user-adjustable alarm relay setpoints
- Active 4–20 mA analog output
- Designed for continuous fixed gas monitoring
- Compatible with PLC and facility monitoring systems
- Remote sensor configurations available
- Remote sensor cable lengths available up to 30 ft
- 24 VDC operation
- Wall-mount design
Available Sulfur Dioxide Ranges
| Detection Range | PureAire Part Number |
| 0–15 ppm SO2 | 90056 |
| 0–20 ppm SO2 | 90213 |
Sulfur Dioxide Safety Monitoring
Sulfur dioxide is a toxic, corrosive gas that is heavier than air and can accumulate in low-lying areas. Continuous fixed monitoring can be used with ventilation, alarm, and facility control systems to provide early warning of increasing sulfur dioxide concentrations.
System Integration
The active 4–20 mA output and adjustable alarm relays allow the detector to interface with PLCs, ventilation equipment, external horns and strobes, remote displays, and other facility safety systems when properly configured.
| Manufacturer | PureAire Monitoring Systems |
| Product Family | Universal Gas Detector |
| Gas Detected | Sulfur Dioxide (SO2) |
| Available Ranges | 0–15 ppm and 0–20 ppm |
| Part Numbers | 90056 (0–15 ppm); 90213 (0–20 ppm) |
| Display | Digital concentration display |
| Analog Output | Active 4–20 mA |
| Alarm Relays | Two user-adjustable alarm relays |
| Alarm Indication | Audible and visual alarm indication |
| Power Requirement | 24 VDC regulated |
| Remote Sensor Option | Available; remote cable lengths up to 30 ft |
| Approximate Unit Weight | 1.2 lb (19.2 oz) |
The PureAire Universal Sulfur Dioxide Gas Detector is designed for continuous SO2 monitoring in areas where sulfur dioxide is used, stored, handled, or may be released.
Typical Applications
- Power generation facilities
- Pulp and paper mills
- Chemical processing facilities
- Food and beverage production
- Petroleum refining
- Industrial manufacturing
- Workplace safety monitoring
Because sulfur dioxide is heavier than air, detector placement should account for potential accumulation in low-lying areas and near potential release points. Final detector location, alarm settings, ventilation requirements, and system integration should be based on the specific application and applicable safety requirements.
Product Literature
Instruction Manuals
- PureAire Universal Gas Detector Instruction Manual – Rev. 4.18
- PureAire Universal Gas Detector Instruction Manual – Rev. 4.17
Sensor & Startup Information
- Universal Electrochemical Cell Post-Shipping Startup Instructions
- PureAire Renewable vs. Disposable Sensor Comparison
Additional Product Literature
Need help selecting the correct PureAire Sulfur Dioxide Gas Detector range, installation, calibration, or system integration? Call CPS Calibrations at 865-900-8844 or email info@cpscalibrations.com.