Installing A 1234 Oxygen Sensor; Installing The Auxiliary Thermocouple - Novatech 1732 Technical Manual

4.3 Installing a 1234 Oxygen Sensor

Mounting - Screw the 1234 Oxygen Sensor to a wall or similar surface with the piping connections at the
top.
Sample Piping - Connect the gas sample piping to the "sample in" port. If the process, boiler, kiln or furnace
has a positive pressure, no suction will be required. If the sample is under a negative pressure, connect a
pump to the "inlet" port. The flow rate should be within the range of 1 to 5 litres/minute (2 to 10 scfh).
Upward sloping
sample line 3/8"
Flue
stainless steel
Gas
Sampling
Probe
Flowmeter

4.4 Installing the Auxiliary Thermocouple

Weld a 1/2-inch BSP mounting socket to the flue within about 300 mm (12"), and upstream of the oxygen
probe. The thermocouple should be of similar length to the oxygen probe to prevent flue temperature
distribution errors.
The thermocouple should be connected to terminals 7 & 8. These terminals will not be available for an
auxiliary thermocouple if a second probe has been installed.
August 2018
1732 Oxygen Transmitter
Inlet ¼" Tube
N1595
Cable Gland
Exhaust
1234 Sensor Mounting Dimensions
1234
Sensor
Optional vent to
atmospherre
Optional return
to flue
Label
1/4" Stainless Steel Tube
Dry
Process
1234
Gas
Sensor
Vent or return
to process
Technical Manual
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