Laser Based – Fixed Point Gas Detection

Understanding the Fundamentals

What you need to know

At a glance, here is what you need to know about the Remote Point (RPX) Probe which makes Fixed Point Gas Detection Measurements.

Remote Point (RPX) Probe Assembly

Configuration Options available

The Remote Point (RPX) Probe Assembly has the following configurable options:

• Cable Kit Length: From 5 to 300 m of Cabling between the Remote Point (RPX) Probe and the GasFinder.

The Remote Point (RPX) Probe is comprised of the following components:

• Open Path (OPX) Head: This houses the Optical Bench which performs the transceiver functionality and where the Fiber Optic and CAT6/5e are connected.
• Perforated Cage:  This provides mechanical protection to keep rain, snow, sleet, condensation, dirt, dust, and debris from accumulating on both the Transceiver and Retro-Window.
• Gray Tape Retro-Array: These are like sections through a thousands of cubes and has three faces that form the inside of a cube and regardless of the angle of incidence of the incoming laser beam, the laser light is always reflected at 180° back to the Optical Bench.
• Mounting Brackets: These allows technicians to easily mount the Remote Point (RPX) Probe either directly to a wall, Uni-Strut, or other flat surfaces.

Looking for documents?

Look no further.

The documents below are to help you through to first interaction through to final commissioning.

• How it Works

  How It Works

  Visualization Representation

  

• Enhanced vs. Traditional Fixed Point Gas Detectors

  Enhanced vs. Traditional

  Comparison between Fixed Point Gas Detectors

  Not all gas detectors are created equal.

  Traditional – Fixed Point Gas Detectors such Electro-Chemical Sensors and Catalytic Bead Sensors do not offer the same enhance functional as Laser Based – Fixed Point Gas Detectors.

  Below is a comparison table between Laser Based – Fixed Gas Detection and Traditional – Fixed Point Gas Detectors:

  

• Remote Point (RPX) Probe

  Remote Point (RPX) Probe

  The Components and their Function

  

  The Remote Point (RPX) Probe includes the following components:

  • Four (4) Sided Perforated Cage: This item helps to prevent items like rain, snow, sleet, condensation, dirt, dust, and debris from accumulating on both the Window/Retro-Array and creating a beam block scenario.
  • Transceiver Configuration: This contains both the transmit and receiving optics on the Optical Bench.
  • Gray Tape Retro-Array: This returns the Laser Light back to the Transceiver Optics.
  • Mounting Clamps: This easily mounts to Uni-Struct or other mounting structures.

  

  The Optical Bench includes the following components:

  • Optical Bench: This formulates the Transceiver Configuration that combines the Transmit and Receive functionality in one efficient enclosure. The Optical Bench can slide back out of the Remote Point (RPX) Probe Enclosure for easy termination of the Single Mode Fiber Optic (FC/APC Connectors) and Shielded CAT6/5e (RJ45 Connectors) Cables.
  • Launch Optics: The Laser Light that travels from the GasFinder via Single Mode Fiber Optic Cabling is Collimated within the Optical Bench and launched from the hole on the Collecting Optics.
  • Collecting Optics: When the Laser Light is returned from the Retro-Reflector the Collecting Optics focus the Laser Light onto the Photodiode.
  • Photodiode: The Photodiode converts the collected Laser Light into a small electrical signal where the GasFinder will perform its Absorption Spectroscopy technique to very accurately and reliably determine the Path Integrated Concentration within the Active Measurement Path.

  

  The Optical Bench includes the following components:

  • Optical Bench:  The Optical Bench can slide back out of the Remote Point (RPX) Probe Enclosure for easy termination of the Single Mode Fiber Optic (FC/APC Connectors) and Shielded CAT6/5e (RJ45 Connectors) Cables.
  • RJ45 Connector: The small electrical signal from the Photodiode is carried to the GasFinder for analysis via Shielded CAT6/5e Cabling.
  • FC/APC Connector: The Laser Light is carried from the GasFinder to the Open Path (OPX) Head via Single Mode Fiber Optic Cabling.
  • Patch Cable Connection: As part of the Open Path (OPX) Head Assembly, the fittings and lengths of cabling are included.