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Monitoring and Detection Equipment

Monitoring and Detection Equipment. Hazmat Industry Technician. Types of Equipment. Monitoring equipment Detection devices Air sampling systems. Purpose of Equipment. Detect presence of substance Identify the substance Measure the concentration. Monitoring Equipment.

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Monitoring and Detection Equipment

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  1. Monitoring and Detection Equipment Hazmat Industry Technician

  2. Types of Equipment • Monitoring equipment • Detection devices • Air sampling systems

  3. Purpose of Equipment • Detect presence of substance • Identify the substance • Measure the concentration

  4. Monitoring Equipment • Continuously measure concentration • Detect fluctuations

  5. Examples • Flame ionization detectors • Combustible gas indicators • Photoionization detectors • Specialized devices

  6. Detection Devices • One-time measuring devices • Provide only positive or negative indication

  7. Examples • Test strips/indicator paper • Carbon monoxide detector

  8. Equipment in Both Categories • pH paper • Colorimetric tubes

  9. Air Sampling Systems • May be required for your worksite • Measure long-term exposures

  10. Types of Air Sampling Systems • Direct reading • Collection systems

  11. Caveat • One size doesn’t fit all • Each type has limitations

  12. Types of Monitoring Instruments • Photo Ionization Detectors (PID) • Flame Ionization Detectors (FID)

  13. Types of Monitoring Instruments • Combustible Gas Indicators (CGI)

  14. Types of Monitoring Instruments • Substance specific • Oxygen • Carbon monoxide • Hydrogen sulfide

  15. Types of Monitoring Instruments • Color change • pH paper • KI paper • Lead acetate paper • Colorimetric tubes

  16. Capabilities and Limitations

  17. Photo Ionization Detectors • Capabilities • Detect wide variety of vapors • Detects vapors at low concentrations • Easy to use

  18. Photo Ionization Detectors • Limitations • Detection ability depends on lamp • May need to be calibrated • Corrosives kill it

  19. Flame Ionization Detectors • Capabilities • Can detect more substances than a PID • Can detect substances a PID can’t

  20. Flame Ionization Detectors • Limitations • Heavier & bulkier than PID • Can run out of hydrogen gas • Won’t work well at low temperatures

  21. Combustible Gas Indicators • Capabilities • Warns of flammable gases/vapors • Accurate for most common gases • Small, light & easy to use

  22. Combustible Gas Indicators • Limitations • May not be accurate for a gas it’s not calibrated to • Common substances can damage sensor • Not accurate in oxygen-deficient atmosphere

  23. Oxygen Sensors • Capabilities • Quickly & accurately measure O2 level

  24. Oxygen Sensors • Limitations • Lacks sensitivity of other sensors • May be inaccurate in presence of oxidizing gases

  25. Color Change • Capabilities • Provide quick indication of substance • Limitation • Detection range may be limited • May not be specific to one substance

  26. Monitoring & Detection Procedures • #1 – identify IDLH conditions

  27. IDLH Conditions • Lack of sufficient oxygen • Oxygen-enriched atmosphere • Flammable gases/vapors • Highly toxic contaminants

  28. Indications of IDLH Conditions • Activated alarm system • Visible vapor cloud • Large amount of product leaking • Dead stuff • Insects, plants, etc.

  29. Monitoring & Detection Procedures • #2 – ID locations of IDLH conditions • Examples in your worksite?

  30. Monitoring & Detection Procedures • #3 – measure level of contaminants

  31. General Procedures • Read the manual! • Monitor for radioactivity • Determine level of oxygen

  32. Why Oxygen Level is Important • Low O2 – something displaced it • High O2 – not naturally occurring • High O2 – increased risk of fire/explosion • Low O2 – CGI may not work

  33. More General Procedures • Use pH paper • Approach from upwind (if possible) • Monitor high and low • Zero reading? • Doesn’t mean nothing is there1

  34. Maintenance and Testing • #1 – store and use properly • Read the manual!

  35. Calibration • Ensures instrument is accurate • Follow manufacturer’s recommendations • Written record? • Does your workplace require it?

  36. Bump Test • Verifies calibration • Expose instrument to known gas • Bad bump test? Time for calibration

  37. Detailed Procedures Read the manual Follow workplace procedures

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