Senscient ELDS OPGD

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Senscient ELDS OPGD

• Introduction to ELDS-based Open Path Gas Detection

Senscient ELDS Open Path Gas Detectors are sold
exclusively by Sensidyne throughout North
America with exception of Texas and Mexico. ELDS
and SimuGas are trademarks of Senscient and used
with permission.
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Senscient ELDS ENHANCED LASER DIODE SPECTROSCOPY
Fulfilling The Promise Of Open Path Gas
Detection
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Enhanced Laser Diode Spectroscopy - ELDS

• ELDS is A NEW laser diode spectroscopy technique
  developed by Senscient.
• ELDS was developed specifically for safety
  related gas detection applications in industry.
• Early warning of a catastrophic EVENT
• ELDS techniques enable high reliability and
  safety integrity to be achieved in adverse
  operating environments

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Senscient ELDS How Does It Work?

• Laser beams traverse monitored paths
• Absorption of laser light by target gas produces
  A harmonic fingerprint
  unique to that gas!
• The fingerprint amplitude is proportional to the
  amount of gas in the laser path
• ELDS can simulate gas presence for
  operational verification
  using SimuGas

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Senscient ELDS

• ELDS is the first laser based gas detection
  technology that is both sensitive and robust.
• ELDS finally enables laser based gas detection to
  be used in harsh environments for
  critical applications.
• The techniques which make ELDS sensitive and
  robust are patented.

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How Does ELDS Work?

• The laser diode drive waveforms are digitally
  synthesized
• A reference channel is employed for harmonic
  fingerprint lock, using A retained gas sample(s).
• The ELDS microprocessors actively maintain
  operating conditions of the laser diode(s) to
  achieve continuous harmonic fingerprint lock.

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ELDS Versus
Atmospheric Absorption

• The laser diodes in an ELDS system are operated
  with conditions that generate A specific and
  unique harmonic fingerprint when their radiation
  is absorbed by target gas and only the target
  gas.

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Senscient ELDS Optical Path

• The reference channel produces the harmonic
  fingerprint by directing part of the laser beam
  through the retained gas sample(s) in the
  cuvette.
• The ability to continuously lock on to this
  fingerprint means gas specificity plus the
  capability to simulate gas presence in the main
  beam for operational checks using SimuGas

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Multi-Gas Senscient ELDS
Sour Gas Solution

Transmitter
Wavelength B _at_ Frequency 2
Solution Gas (Sour)
Wavelength A _at_ Frequency 1
Absorption by Gas

• Methane and hydrogen sulfide are intimately mixed
  in sour gas and do not separate under atmospheric
  conditions.
• Placement guidelines mirror methane-only
  experience due to highly predominant
  concentration of methane in virtually all sour
  gas applications.

Receiver
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SimuGas Feature

• SimuGas remote, on-command,
  functional testing of
  ELDS gas detectors
• A small retained sample of target gas in the ELDS
  transmitter is used to maintain harmonic
  fingerprint lock and enable electronic synthesis
  of the target gas
• Because the SimuGas check is based on the signal
  produced by real gas in the transmitter . . .
• And uses the simple physical constants of
  concentration versus signal intensity . . .
• The system acts like an analyzer in a sensor
  housing!

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SimuGas Benefits

• SimuGas provides ability to accomplish
  on-demand, remote functionality testing from the
  control room or PLC.
• Detector testing can be performed remotely and
  automatically without gas cells or test filters!
• Standard bi-directional hart communication
  provides automatic remote functional check
  actuation and data logging for complete
  operational confidence.
• Increased safety integrity . . . can be repeated
  at any desired frequency.
• Significantly reduces cost of ownership!

ELDS and Simu-Gas are registered trademarks of
Senscient and are used with their permission.
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Adverse Conditions

• Fog, Rain, Sleet, Snow And Ice
• ELDS Has Heated Optics
• 0 100 RH (non-condensing), -40º C to 65º C
• ELDS Operates At Greater Than 90 Obscuration
• Tolerates Up To 0.5º Misalignment
• Salt Water Or Very Dirty Environments
• All 316Lss construction
• Ingress protection IP 66/67 - no internal
  maintenance
• Integral junction box sealed from internals
• Beam Fault Notification
• Beam Block Or Obscuration Warning
• Configurable Low mA For Block Or Obscuration
• More Info On HART Or RS 485 Communications
• Vibration Rated At 100 Hz, 20 g

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Open Path Gas Detection Applications

• Hazardous areas for flammable and toxic gases
• All facilities ambient area and perimeter
  monitoring,
• Oil and gas production
• Refinery crude unit, de-sulfurization, alkylation
• Refinery tank farms crude or finished product
• Loading racks pump, meter and transfer
• Pipeline, tanker, barge, railcar, or truck
• Natural gas dehydration and de-sulfurization
• Natural gas liquids production and distribution
• Ethane, propane butane, isobutane, pentanes
• Natural gas processing and pipelines
• Compressor stations

NGL Column
Crude Unit
Compressor Station
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Open Path Gas Detection Applications

• Other Applications
• Chemical Loading Racks
• Terminal, Barge, Railcar And Truck
• HVAC Ducts
• Control Room Protection
• Gas Turbine Acoustic Enclosures
• Wet Wells, Tunnels, WWTP Processes
• Methane, Hydrogen Sulfide And Oxygen
• Ammonia Refrigeration And Processes
• Aluminum And Copper Smelting
• HF And HCl
• Toxic Chemical Loading Racks

LNG Loading Rack
Rail Loading Rack
Ammonia Compressors
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Bracket with Adjustable Mount

• Flat surface or pipe mount with advanced 3-axis
  alignment adjustments.

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Commercialization Partners

• Shell Global
• Exxon Mobil
• Enterprise Oil
• Sensidyne, LP
• DOW Chemical
• Bayer Chemical
• British Petroleum
• Lyondell Refining
• NANAColt Engineering
• Houston Analytical Systems
• Others

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Senscient ELDS Detectable Gases

• Toxic Gases

• Flammable Gases

• Hydrogen Sulfide
• Ammonia
• Hydrogen Chloride
• Hydrogen Fluoride
• Carbon Monoxide
• Hydrogen Bromide
• Hydrogen Iodide
• Hydrogen Cyanide
• Carbon Dioxide
• Oxygen

• Methane
• Propane
• Butane
• Ethane
• Ethylene
• Propylene
• Butadiene
• Methanol
• Vinyl Chloride Monomer
• Ethylene Dichloride

Available Now Single Gas Models For Methane or
H2S Dual Gas Methane H2S Planned For 2009
Single Gas Models For Ammonia, HCl, CO2, And HF
Dual Gas For Methane And Ethylene Butadiene
And HF
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Senscient ELDS User Tools

• Full printed documentation
• Complete installation, operating
  and maintenance instructions
• Alignment telescope
• Right angle, quality rifle scope with precision
  mount for ELDS
• Optional ruggedized PDA
• Class I, division 1 approved
• Irda interface direct to ELDS
• Wi-fi (IEEE 801.1x) Blue Tooth capability
• Full documentation onboard
• ELDS commissioning via irda

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Senscient ELDS Takeaways

• Three Orders of Magnitude Better Sensitivity
• Longer Path Length (650 Feet Flammables, 120-350
  Feet Toxics)
• Single Digit PPM.M Levels, Lower CapEx and COO
• Detects Flammables And Toxics
• Single And Dual Gas Units With Differentiation
• Gas Specific
• Never A False Event Or Cross-interference
• Very Fast Response
• T-90 lt 1-5 Seconds - Earliest Warning For Hazard
  Mitigation
• SimuGas Operational Confirmation
• Virtual Zero Cost of Ownership, Huge COO Savings
• Global Performance Certifications
• Certified To The Newest Global Performance
  Standards

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Senscient ELDS ENHANCED LASER DIODE SPECTROSCOPY
Fulfilling The Promise Of Open Path Gas
Detection
Senscient ELDS Open Path Gas Detectors are sold
exclusively by Sensidyne throughout North
America with exception of Texas and Mexico. ELDS
and SimuGas are trademarks of Senscient and used
with permission.