Boreal Laser Gasfinder MC
GasFinderMC is a multiple path system that can monitor up to eight paths at the same time. These paths can be open path, process or stack/duct or any combination of these. GasFinderMC is primarily used for fixed installations and in hazardous areas. The photograph on the right shows an 8-channel
GasFinderMC control unit (CCU) with an open path transceiver head. Using the multiple path capability of GasFinder MC, it is now possible to provide complete facility perimeter coverage at relatively low cost.
Oil & Gas· HF leak detection in refinery HF Alkylation units· H2S safety monitoring in Sour Gas Operations· Fence line H2S, CH4 and NH3 monitoring in refineries, petrochemical plants, etc.Primary Aluminium· Pot room and perimeter ambient HF monitoring· HF scrubber inlet, outlet and stack monitoringSelected Others· HF leak detection in HF manufacturing and use· HF stack monitoring (bricks, ceramics, incinerators)· NH3 stack monitoring (de-NOx and others)· Agricultural CH4 and NH3 flux measurements
Benefits
- Gas specific – no interferences
- Fast response times – typically 1 second.
- Path lengths from 1 to 1000 m
- Multiple Path – flexible configurations
- Robust, reliable, proven technology
- Self-calibrating—no calibration needed
- Easy set-up, alignment and use.
- No consumables and no maintenance
- Built-in self diagnostics
How GasFinderMC works
Boreal Laser’s GasFinder MC (US Patent No. 5,748,325) measures gas concentrations in up to 8 measurement channels. A Central Control Unit (CCU) contains the laser diode source, drive electronics, detector signal processing and microcomputer subsystems. Fibreoptic cable carries the laser light to transceiver heads, which direct the beam along a path to a reflector. The return light is collected on a photo-detector. The photo current is returned to the CCU using coaxial cable. The transmitter heads are therefore intrinsically safe.
The transceiver can be mounted in one of several different measurement head configurations. A long path transmitter head can be used for open path monitoring to 1km. A variable length crossduct probe is used for permanent stack or duct monitoring. A multipass gas cell is available for high sensitivity extractive monitoring.
A portion of the laser beam is passed through an onboard reference cell to provide a continuous calibration update. The measure and calibration signals are processed to determine the gas concentration in each optical path. The computed gas concentration is displayed on the front panel of the CCU as well as being transmitted to the customer’s central computer where the data may be collected, stored, and displayed.
