- OBJECTIVE
- Instantaneous detection of gas leakage, or highly sensitive measurement of environmental trace gases
- PRESENT STATUS
- Sensitivity : 50 ppb (absorption pathlength:1m, time constant:1 sec)
- High speed leakage survey by a vehicle mounted system (Fig. 1)
- Collaboration with Anritsu Co.
Fig.1 Photo of the vehicle-mounted laser methane detector - PRINCIPLE
- Utilizing a diode laser developed for optical communications (Wavelength for methane detection : 1.6micron)
- Frequency modulation method for high sensitivity measurement (Fig.2)
- Stabilization of the laser wavelength on an absorption line for continuous measurement)
- Coupled with optical fibers
Fig.2 Principle of frequency modulation method - APPLICATION
- Portable scanning leakage detector utilizing scattered light
- Multi-gas detection (methane, acetylene, ammonia, water vapor, etc.)
- Environment measurements (precise measurement of trace gases in atmosphere)
- Temperature, pressure measurements
- Others
For More Information:
Takaya Iseki
Technical Research Institute
Tokyo Gas Co., Ltd.
16-25, Shibaura 1-Chome, Minato-ku, Tokyo 105-0023, Japan
Tel:+81-3-5484-4811 Fax:+81-3-3453-2674
E-mail:iseki@tokyo-gas.co.jp
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Laser Methane Detector
Instantaneous Detection of Invisible Gas