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2.2
INSTALLING THE OXYGEN PROBE
Weld a 1.5" BSP or NPT socket to the dryer or oven in a suitable position for sensing the water vapour level. The
closer to the source of moisture the smaller will be a sensing lag time, allowing better control.
The probe has a typical response time of less than four seconds, so most of the delay time is normally the transit time of
the gas from the point of moisture emission to the point of sensing.
It is necessary to angle the probe downward at about 20° minimum angle from horizontal, to avoid water vapour
building up in the probe housing. The sensing tip should be lower than the head.
2.3
INSTALLING THE RGS-01, REFERENCE GAS SENSOR
Screw the RGS-01 to a wall or similar surface with the piping connections at the bottom. Connect the gas sample
piping to the "sample in" port. The gas sample piping should be thin wall, 1/2" OD, stainless steel tube approximately
two metres long. It should rise vertically or at an angle of at least 20° from the horizontal.
1234 OXYGEN SENSOR
August 2009
1635 Water Vapour Analyser
Installing an Oxygen Probe in the Dryer of Oven
PUMP
WATER TRAP
SAMPLE IN
1/4"COLLECTOR TUBE
NOVATECH
CONTROLS
EXHAUST
POWER SUPPLY GLAND
SIGNAL WIRE GLAND
Installation of the reference gas sensor
Dryer or Oven
20°
1/2" #20 SAMPLING TUBE
Horizontal mounting requires
a minimum angle of 20° to
avoid water vapour
condensing at the cold end
1231 PROBE
FLANGE
SAMPLING TUBE
15
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