PM400 Multi-Gas Personal Monitor
REV – 2.0
[34-2900-0206-2 ]
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P a g e
The Catalytic Bead sensor is more prone to sensor drift:
These sensors typically require more frequent calibration.
See
•
The Catalytic sensor requires more power:
Due to the sensor design, the Catalytic Bead sensor requires
more power to operate, thus shortening the runtime of the monitor.
1.3.3
Non-Dispersive Infra-Red (NDIR) technology (PM
400
IR) Overview
1.3.3.1
Disadvantages of NDIR technology
•
Doesn’t detect certain combustible (LEL) gasses:
Gases such as hydrogen and acetylene go undetected by
NDIR sensors.
Be sure the safety of your users isn’t dependent on detecting hydrogen and/or acetylene. The PM
400
IR does NOT
detect these gases.
1.3.3.2
Advantages of NDIR technology
•
The NDIR sensor does not require oxygen to detect gases:
Because the NDIR sensor uses absorbed light
spectrum technology to detect combustible gases, the sensor does not require oxygen to operate, making it
ideal for inert and oxygen deficiency applications.
•
The NDIR is more durable:
Cannot be inhibited, poisoned by external chemicals and gases.
•
The NDIR sensor is more stable:
Requires minimal recalibration and is typically stable even after extended
storage.
•
The NDIR sensor has a longer lifespan:
The sensor has a life expectancy of up to 10 years.
•
The NDIR sensor requires less power:
Due to the sensor design the NDIR sensor requires less power to
operate, thus allowing for extended runtimes compared to the Catalytic Bead sensor.
