12
7.
PROBES
Standard Probe
The standard probe (Part No. SP-306), a rigid tube, connects to the dust and water-block
filter. If extra length is desired, an extension (7", SP-308) is screwed finger-tight onto the end of
the probe. A rubber gas collector (Part No. RT-107) is useful for finding leaks under windy
conditions.
CAUTION:
Do not use this probe for flue gas measurements. The plastic probe may
become soft, deform, or decompose.
Flue Gas Probe
The flue gas probe (Part No. FP-110) is a telescoping metal probe screwed finger-tight
into the flue gas filter. The other end of the filter attaches to the dust and water-block filter. This
probe, together with its filter, may also be used for CO measurements in ambient air.
CAUTION:
Never attach the filter cartridge directly to the sample hose - always use a water
block filter.
WARNING:
Hold the probe without touching the metal while it is in the flue and
immediately afterwards. Running the instrument in air after a
measurement will help cool the probe quickly and dry the filters.
Bar Hole Probes
There are four optional probes suitable for bar holing:
Bar Hole/Ceiling Probe (Part No. BP-034) 34" long, clear, one hole at end.
Bar Hole Probe (Part No. BP-134) 34" long, clear, side holes.
Bar Hole Probe (Part No. BP-236) 36" long, fiberglass, side holes
Bar Hole Probe (Part No. BP-536) 36" long, steel, side holes.
The bar hole/ceiling probe has a single inlet on the end and comes with a rubber gas
collector (Part No. RT-030) useful for finding leaks in overhead pipes. The stainless steel probe
has an electrically insulated handle. Bar hole probes are designed to be attached to the water
block filter on the hose. A convenient way to release water from a bar hole probe is with a
water-stopper (Part No. WS-001) described in Section 8.
WARNING
:
Hold the steel bar hole probe only by the insulated handle to avoid
electrical shock from buried power lines.
