Gas Tracer Operator’s Manual, CSA Version
Instrument Description • 13
Figure 2: Components of the Gas Tracer, Bottom
Case
The Gas Tracer’s sturdy, high-impact plastic case is radio frequency (RF) resistant
and is suitable for use in many environmental conditions, indoors and out. The
case is dust proof and weather resistant. A rubber layer on the outside of the case
protects it from scratches and impact damage.
A clear plastic window through which the LCD can be viewed is located on the
front of the case. Four brass charging contacts that are used when the Gas Tracer is
placed in the charging station are on the back of the case. Both the rechargeable
and alkaline version include a removable battery pack. The battery pack release
latch is on the bottom. The alkaline battery version also includes a battery cover
release knob. The battery pack and flow chamber are located on the back of the
Gas Tracer. The inlet filter holder is located on the top of the Gas Tracer case.
Sensors
The Gas Tracer uses up to five sensors to monitor combustible gas, oxygen (O2),
and carbon monoxide (CO) simultaneously. The sensors are located inside the Gas
Tracer and are held in their sockets by the flow chamber. The sensors use different
detection principles, as described below.
Combustible Gas Sensors
% LEL Sensor (NC-6264B)
The % LEL sensor detects combustible gas in the % LEL range. It uses a catalytic
element for detection. The reaction of gas with oxygen on the catalyst causes a
change in the resistance of the element which affects the current flowing through
it. The current is amplified by the Gas Tracer’s circuitry, converted to a
measurement of combustible gas concentration, and displayed on the LCD.
Rechargeable Version
Battery Pack
Battery Pack
Release Latch
Battery Cover
Release Knob
Alkaline Version
