Description
1. Product Overview
2. Key Features
Ultra-low detection range: 0–10 ppm (customizable up to 5,000 ppm)
Fast response: T90 response time <10 seconds
High accuracy: ±3% Full Scale (F.S.)
Self-powered operation: No external power supply needed
Superior stability: Monthly drift <1.5%; linearity ±2.5% F.S.
Compact & lightweight: Miniature package for space-constrained applications
Anti-poisoning design: Resistant to common interfering gases (e.g., CO₂, N₂)
3. Technical Specifications
3.1 Electrical Parameters
| Parameter | Value |
|---|---|
| Working Principle | Electrochemical (galvanic cell) |
| Output Current | 800–500 μA (in ambient air) |
| Measurement Range | 0–10 ppm (customizable: 0–5,000 ppm) |
| Response Time (T90) | <10 s |
| Accuracy | ±3% F.S. |
| Linearity | ±2.5% F.S. |
| Monthly Drift | <1.5% |
| Temperature Coefficient | 4.0%/°C |
| Electrical Interface | Gold-plated pins (pin 1: positive, pin 2: negative) |
3.2 Mechanical Parameters
| Parameter | Value |
|---|---|
| Housing Material | ABS (Acrylonitrile Butadiene Styrene) |
| Dimensions | Φ12 mm × 8 mm |
| Weight | ~3 g |
| Inlet Diameter | 1.5 mm |
3.3 Environmental Parameters
| Parameter | Value |
|---|---|
| Operating Temperature | 0–50°C |
| Operating Humidity | 0–95% RH (non-condensing) |
| Operating Pressure | Atmospheric pressure ±15% |
| Expected Lifespan | >18 months (in air) |
| Shelf Life | 9 months (from delivery date) |
4. Application Scope
Portable Gas Analyzers: Handheld oxygen detectors, multi-gas analyzers
Medical Industry: Anesthesia delivery systems, respiratory monitors, incubators
Industrial Process Control: Nitrogen generator monitoring, semiconductor packaging, food packaging
Laboratory Equipment: Inert gas cabinets, glove boxes, gas chromatographs
Safety Monitoring: Confined space entry, pipeline leak detection, inerting system verification
5. Installation & Operation Guidelines
5.1 Installation
Orientation: Mount horizontally or vertically; avoid direct exposure to high-velocity gas flow.
Wiring: Connect pin 1 (positive) and pin 2 (negative) to the measurement circuit; avoid reverse polarity.
Gas Connection: Use 1/16-inch PTFE tubing; maintain flow rate 100–300 mL/min (excessive flow may damage the sensor).
5.2 Operation
Warm-Up: Allow 10-minute warm-up after installation for stable readings.
Calibration:
Zero Calibration: Expose to 100% nitrogen (0 ppm O₂) and adjust zero offset.
Span Calibration: Expose to a known concentration (e.g., 10 ppm) and adjust span gain.
Reading: The sensor outputs a current signal proportional to oxygen concentration; convert to ppm via the calibration curve.
6. Safety & Maintenance
6.1 Safety Precautions
Non-explosion-proof: Do not use in flammable/explosive atmospheres.
No liquid contact: Avoid exposure to water, oil, or corrosive gases (e.g., H₂S, Cl₂).
ESD protection: Use anti-static gloves during handling to prevent electrostatic damage.
6.2 Maintenance
Regular Calibration: Perform zero/span calibration every 3–6 months (depending on usage).
Filter Replacement: Replace the inlet filter every 4 months to prevent dust contamination.
Storage: Store in a cool, dry place (15–25°C, 40–60% RH) in sealed packaging; avoid extreme temperatures.
7. Troubleshooting
| Issue | Possible Cause | Solution |
|---|---|---|
| No Output | Wiring error or sensor expiration | Check wiring; replace sensor if expired |
| Unstable Readings | Insufficient warm-up or flow turbulence | Warm up for 10 min; stabilize gas flow |
| Slow Response | Contaminated filter or sensor aging | Replace filter; recalibrate or replace sensor |
| Large Drift | Temperature fluctuation or expired calibration | Compensate for temperature; recalibrate |
8. Manufacturer Information
Brand: ASAIR (Guangzhou Aosong Electronics Co., Ltd.)
Address: No. 10, Kexue Avenue, Science City, Guangzhou, China
Website: www.aosong.com
Support Email: support@aosong.com
Tel: +86-20-3229 8888
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