GasFinder — Line of Sight (LoS)

Laser Based – Open Path Gas Detection

Boreal GasFinder-LoS device

  • All-in-One Open Path Gas Detection

    Complete analyzer in a compact field device

  • Speed of Response

    1 second results with no cross sensitivity

  • No Calibration or Bump Test Required

    Automatic health and calibration check

  • Free of consumables

    Reduce maintenance time and costs

#1 Select your Target Gas

More gas ranges available. Common industry alarm thresholds, exact alarm setpoints should be determined by the end user.

HF

Hydrogen Fluoride

Lo-Range: 0.4-250 ppm-m

Hi-Alarm: 3 ppm

HiHi-Alarm: 9 ppm

H2S

Hydrogen Sulfide

Lo-Range: 100-100,000 ppm-m

Hi-Alarm: 10 ppm

HiHi-Alarm: 40 ppm

NH3

Ammonia

Lo-Range: 8-6,500 ppm-m

Hi-Alarm: 25 ppm

HiHi-Alarm: 50 ppm

CO2

Carbon Dioxide

Hi-Range: 1,000-500,000 ppm-m

Hi-Alarm: 20,000 ppm

HiHi-Alarm: 30,000 ppm

CO

Carbon Monoxide

Hi-Range: 250-500,000 ppm-m

Hi-Alarm: 100 ppm

HiHi-Alarm: 200 ppm

CH4

Methane

Hi-Range: 100–500,000 ppm-m

Hi-Alarm: 1 LEL-m

HiHi-Alarm: 3 LEL-m

HCN

Hydrogen Cyanide

Lo-Range: 8-2,500 ppm-m

Hi-Alarm: 4.7 ppm

HiHi-Alarm: 10 ppm

HCl

Hydrogen Chloride

Lo-Range: 2-2,500 ppm-m

Hi-Alarm: 2 ppm

HiHi-Alarm: 5 ppm

C2H4

Ethylene

Lo-Range: 0-5,000 ppm-m

Hi-Alarm: 20% of LEL-m

HiHi-Alarm: 40% of LEL-m

#2 Select your Path Length

Suggested Path Length: Consideration has been given to optimizing the ability to obtain & maintain optical alignment.

  • Short-Path (IMOS)

    Suggested Path Length: 5-20 m (15-65 ft)

  • Medium-Path (Wafer)

    Suggested Path Length: 20-50 m (65-165 ft)

  • Long-Path (Cornercube)

    Suggested Path Length: 50-100 m (165-330 ft)

  • Extra Long-Path (Cornercube)

    Suggested Path Length: 100-200 m (330-650 ft)

Path length comparison chart

#3 Mounting Height / Structure

  • Suggested Mount Size for Short-Path

    >4” Post @ 7’ Height or >6” Post @ 13’ Height

  • Suggested Mount Size for Medium-Path

    >6” Post @ 7’ Height and >8” Post @ 13’ Height

  • Suggested Mount Size for Long-Path

    >8” Post @ 7’ Height and >10” Post @ 13’ Height

  • Suggested Mount Size for Ultra Long-Path

    >10” Post @ 7’ Height and >12” Post @ 13’ Height

Laser Based – Open Path Gas Detection is typically mounted at a height between 2m (7ft) - 4m (13ft).

Mounting height and area of influence diagram

Reference: Center for Chemical Process Safety – Continuous Monitoring for Hazardous Releases

#4 Optimize Installation

Single GasFinder-LoS replacing multiple point detectors

The need for numerous point detectors (green) can be eliminated with a single GasFinder-LoS (yellow).

  • Increase your Probability of Detection

    With area and perimeter monitoring strategies

  • Detector Placement Relative to Source

    Multiple sources covered with single path

  • Gas Dispersion and Movement

    Air currents dictate plume direction and size

  • Beware of Potential Optical Obstructions

    Such as cranes, forklifts, trucks, people, etc.

#5 Power + Communication

  • 3 or 4 Wire 24 VDC Device

    Polarity protected and internally fused

  • Analog, Relay, and MODBUS

    HART7 4-20mA, dry contact relay, RS-485

  • Wireless Configuration

    Configuration via wired handheld HMI (optional)

  • Continuous Onboard Logging

    USB accessible data storage

GasFinder-LoS wiring interface close-up

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