Extendable field probe
Match to the walking-survey sampling arrangement.
Ask About This Option ↗NOVEL · PRODUCT AND SYSTEM SOLUTIONS
PERGAM SELMA Duo Methane and Ethane Leak Survey System
SELMA Duo (Sniffer) is an extractive TDLS analyzer designed for both pedestrian walking surveys and vehicle-based mobile gas leak inspections.
Plan the Right Configuration
SELMA Duo (Sniffer) is an extractive TDLS analyzer designed for both pedestrian walking surveys and vehicle-based mobile gas leak inspections. It measures methane (0–40,000 ppm) and ethane (0–1,000 ppm) with a 0.01 ppm display resolution. Notably distinct from resolution, the lowest detection limit is <=0.30 ppm for CH4 (<=0.15 ppm with 10-second averaging) and <=15 ppm for ethane (<=10 ppm with 10-second averaging). Field operations are supported via an Android smartphone app, Bluetooth data sync, and GPS route tracking.
The 0.01 ppm resolution is not the detection limit. Methane/ethane assessment supports field investigation of the gas source; it is not conclusive source attribution by itself.
Request a Quote from NOVEL ↗Technical Specifications
Model and Configuration
- Method
- Extractive TDLS; walking or vehicle surveys
- Methane range
- 0–40,000 ppm
- Ethane range
- 0–1,000 ppm
- Resolution
- 0.01 ppm
- Methane detection limit
- ≤0.30 ppm; ≤0.15 ppm with 10 s averaging
- Ethane detection limit
- ≤15 ppm; ≤10 ppm with 10 s averaging
- Data
- Android application, Bluetooth and GPS route recording
Applications
Pedestrian routes, vehicle gas-distribution surveys and leak investigations requiring methane/ethane assessment.
Accessories and Configuration Options
Options listed here are not a statement of standard delivery or current stock. Exact accessory codes and compatibility are confirmed against the model and ordered scope.
PRODUCT GUIDE
Frequently Asked Questions
Is resolution the detection limit?
No. The 0.01 ppm resolution differs from the documented gas-specific detection limits.
Why measure ethane?
Ethane data alongside methane supports field assessment of the gas source; it is not conclusive source attribution alone.
How are data recorded?
The system supports an Android application, Bluetooth and GPS route recording.