Introduction to Landfill Gas Instruments

1
INTRODUCTION TO LFG INSTRUMENTS
2
SENSORY THEORY

• CATALYTIC - PPM AND 0 TO 10 GAS (O2 DEPENDENT TO
  2)
• THERMAL - 10 TO 100 GAS BY VOLUME (NON O2
  DEPENDENT)
• CHEMICAL - O2, H2S, CO

3
GMI INSIDE CASE
4
GMI AND SAMPLING COMPONENTS
5
GMI BODY AND BATTERY
6
PROBE AND COMPONENTS
7
GMI IN COMBUSTIBLE GAS INDICATOR MODE USES AND
FEATURES

• COMBUSTIBLE PPM RANGE
• NO AUDIBLE OR VISUAL ALARMS
• MANUAL DATA LOGGING ONLY
• MANUAL RANGE VIEWING WITHOUT AUTOMATIC HAZARD
  OVERRIDE

8
GMI IN COMBUSTIBLE GAS INDICATOR MODE USES AND
FEATURES CONT.

• MEASURES CO AND H2S, PPM RANGES
• HEALTH SAFETY AND REGULATORY SCREENING TOOL
• NOT TO BE USED IN LIEU OF LAB ANALYSIS

9
USING THE GMI IN COMBUSTIBLE GAS INDICATOR MODE
(CGIM)

• Press SECOND button ONCE to turn on
• Press second button ONCE to change range
• Press second button TWICE to re-zero ppm range
• Press third button to take samples
• Press top/first button twice to turn off
• ONE SECOND OR MORE

10
CGI Mode-Ranges

• GAS BY VOLUME
• TOTAL COMBUSTIBLE GAS IN PPM
• OXYGEN BY VOLUME
• PPM CARBON MONOXIDE (CO)
• PPM HYDROGEN SULFIDE (H2S)
• THEN BACK TO
• GAS BY VOLUME

11
GAS SAMPLING EQUIPMENT

• MAGNAHELICS
• EVAC/TRANSFER PUMP
• TEDLAR BAGS
• TUBING AND CONNECTORS

12
MAGNEHELIC
13
EVAC/TRANSFER PUMP