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8.5.1 Gas sampling probe
General description
The gas sampling probe is made of a stainless steel hose, with a plastic hand grip and includes an internal K-
type thermocouple (Ni-NiCr) for measuring the gas temperature of the gas.
The thermocouple is located in the probe tip. It is connected to the instrument via a compensated cable running
in a specific slot of the rubber hose of the sample probe. The compensation of the cold junction is performed with
a Pt100 RTD (Resistance Temperature Detector) that measures the temperature in correspondence of the
thermocouple connector.
The K-type thermocouple (Ni-NiCr) allows continuous measurements at high temperatures.
The instrument has another internal Pt100 RTD for measuring the internal temperature; this sensor is also used
for measuring the ambient temperature.
In case you wish to detect the temperature of the combustion air directly into the intake stack you will have to use
the Tc-K type optional remote sensor. It is suggested to perform this measurement to carry out the calculation of
the efficiency of the system when the temperature of the combustion air is different than the temperature of the
environment where the instrument is positioned.
Technical features:
Temperature sensor: K-type thermocouple (Ni-NiCr) - IEC584 - class 1
Pneumatic connectors: Pressure: Male - diameter 8.9 mm
Gas input: Male - 8mm diameter
Connettore sensore temperatura: TC-K mignon
Tube: Material: EPDM
Adaptor for pockets: Material: Galvanized steel
External diameter: 10 .. 22 mm.
Handle: Material: Nylon
Color: Black
Tip: Material: AISI 304 stainless steel
Diameter: 8 mm
WARNING: in case of measurement of very high temperatures it is recommended to remove the tip
slowly in order to let it cool down without suffering heat stress; once extracted from the measurement
point do not place it on a cold surface, otherwise this could affect the internal temperature sensor; in
case of failure of the thermocouple it is possible to replace the bare element with a compensated cable
(see section 18 "Spare parts and servicing").
8.5.2 Smoke sampling probe for average CO measurement
This probe, is made up by an INOX AISI 304 steel multi-perforated stiff tip, provided with a adjustable well
adapter, it allows to take the smoke from different spots of the chimney, so to obtain the average CO measure.
The smoke temperature is measured through a thermocouple type K (Ni-NiCr) inserted in the probe tip. This is
connected to the instrument through a compensated cable inserted in a proper seat of the smoke sampling probe
rubber pipe. Because of the technical construction of the tip, the internal thermocouple does not detect
immediately the correct smoke temperature. The compensation of the cold junction is made with a Pt100
thermoresistance which detect the temperature in correspondence of the thermocouple connector. The
thermocouple type K (Ni-NiCr) allows continuous measures at high temperatures. This probe can be also used
for the combustion analysis.
Technical specifications
Temperature sensor: Thermocouple type K (Ni-NiCr) - IEC584 - class 1
Pneumatic connectors: Male- diameter 8,9mm pressure connection
Male - diameter 8mm gas entrance connection
Temperature sensor connector: TC-K mignon
Tube: Material: EPDM
CODE TIP LENGTH EPDM TUBE LENGTH MAXIMUM WORKING TEMPERATURE
AASF51A 180 mm 2 m 400°C - immersion depth 100mm
AASF52A 300 mm 3 m 600°C - immersion depth 160mm
AASF62A 300 mm 3 m 600°C - immersion depth 160mm
AASF65A 750 mm 3 m 800°C - immersion depth 500mm
AASF66A 1000 mm 3 m 1200°C - immersion depth 500mm
AASL05A 300 mm 2 m 130°C - immersion depth 160mm
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