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Combustible LEL (Minature) Sensor

Combustible LEL (Minature) Sensor

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Combustible LEL (Minature) Sensor

Product catalog summary

Performance Specifications

Sensitivity: 13 to 18.5 mV/% methane.
Response Time: t90 from air to 50% LEL methane is less than 12 seconds.
Zero Output: ±25 mV in zero air.
Range: 0 to 100% LEL methane.
Linearity: 5% non-linear at 6% methane.

Environmental Specifications

Sensitivity Change at -20°C: 103 to 105% referenced to 20°C.
Sensitivity Change at 50°C: 101 to 102% referenced to 20°C.
Zero Change at -20°C: Less than +0.5% LEL referenced to 20°C.
Zero Change at 50°C: Less than -0.5% LEL referenced to 20°C.
Temperature Range: Certified to T6 from -40° to 45°C.

Sensitivity to Other Gases

n-Pentane: 0.50% LEL pentane/% LEL methane.
Acetylene: 0.70% LEL acetylene/% LEL methane.
HMDS Poisoning: 10 hours until 50% activity loss at 10ppm HMDS.

Electrical Specifications

Voltage: 3.0 V (±0.1 V).
Power Consumption: 190 mW.
Voltage Sensitivity: Less than 2% sensitivity change per 0.1V change.

Figures and Diagrams

Figure 2: Shows voltage sensitivity variation, indicating the pellistor's insensitivity to small voltage changes.
Figure 3: Illustrates zero output variation due to temperature changes, with shifts less than ±0.1% LEL from -30°C to +50°C.
Figure 4: Demonstrates HMDS poisoning effects over time.

Additional Notes

All sensors are tested under ambient conditions with methane unless otherwise stated.
Customers are advised to test sensors under their own conditions to ensure suitability.
Alphasense Ltd reserves the right to change design features and specifications without prior notification.

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