In-situ Oxygen Analysis for Concentrations as low as 1 x 10^-30 to 100%

The Novatech 1231 and 1232 Oxygen probes incorporate the world’s most rugged zirconia sensors. They are ideal for:

• Flue gas analysis
• Oxygen levels in boilers, kilns and furnaces
• Combustibles analysis
• Carbon potential measurement
• Water vapour concentration and dew point measurement
• Inert and sterile packaging
• General industrial use
• Annealing furnaces

The Novatech 1231 and 1232 Oxygen probes are Australian-made and embody the research and development of one of Australia’s premier research organisations, the CSIRO. The Novatech 1231 and 1232 probes are highly accurate, and have minimal drift (±1%). The Novatech in-situ probes are highly durable; choose the Novatech 1231 for analysing gases with temperatures below 900ºC and the Novatech 1232 for temperatures 700°C to 1400°C.

The Novatech 1231 and 1232 probes have a very rapid response to changes in Oxygen levels

A response time of between 1 and 4 seconds to oxygen level concentration changes means that potentially hazardous situations such as those caused through the build-up of dangerous, fuel-rich conditions can be avoided.

The Novatech 1231 and 1232 probes are easy to install

The probes are inserted into the flue, or other measuring point, and the threaded nipple (1231 has 1.5“ BSPT/NPT; 1232 has 3/4” BSPT/NPT) is screwed on to a mating socket welded to the process. Connect the probe cable to the transmitter, and you are ready to measure and/or control the combustion process.

Novatech offers you safety of operation

Use the Novatech 1732 which has a main burner safety interlock. This is the ONLY reliable way of preventing potentially explosive situations;
SHOULD THE MAIN BURNER FAIL OR SHUT DOWN THEN THE SENSOR’S HEATER IS DE-ENERGISED SO THAT DANGEROUS FLUE GASES CANNOT BE IGNITED BY THE PROBE!

Specifications

Model	1231	1232
Applications	Combustion Flue gasses below 900°C (Note 1)	Combustion flue gasses above 700°C with no contaminants; eg natural gas, light oils
Temperature Range	0-900°C	700-1000°C 253MA Stainless Steel 700-1400°C Alumina Ceramic
Probe Insertion Length	250, 350, 500, 750, 1000, 1500, 2000mm	500, 750, 1000mm
Process Connection	1.5" BSPT or NPT	3/4" BSPT or NPT
Outer Sheath	32mm OD 316 Stainless Steel, 42mm with optional filter	19mm OD 253MA Stainless Steel or Alumina Ceramic
Electrical Connection	Weather-proof plug-in connector or optional screw terminals.
Cable	1231 Cable can be supplied with a separate polyurethane reference airline. 1232 Cable has an integral airline.
Heater	Yes	No
Internal Thermocouple	Type 'K'	Typically Type 'R'. Also available with no TC, Type 'S' or 'K'
Response Time	Typically <4 seconds	Typically <1 second
Head Temperature	100°C Max	150°C Max
Reference Gas	Air 50 cc/minute approx. Pump can be supplied within transmitter
Calibration Check Gas Flow	Approx. 2 litres/minute	Approx. 2 litres/minute
Ref. Air Connection	1/4" tube	Integral air line through connector or 1/4” tube
Particulate Filter	Optional sintered titanium alloy 30 µm standard, 15µm extra fine	Not available
Cal. Check Gas Connection	1/8" NPT female	1/8" NPT female
Weight	1.75Kg + 160g per 100mm insertion length add 350g for sintered filter	1.6Kg + 100g per 100mm insertion length

For information regarding the 1231HWV probe refer to the 1735 Water Vapour Transmitter

Notes:

1. Care must be taken to avoid contact with explosive or inflammable gases with 1231 heated Oxygen probes when hot. Novatech Oxygen transmitters have built-in safety protection which disconnects the heater when the main flame is off.
2. A separate flue gas thermocouple is required with a 1231 probe if a flue gas temperature display on the transmitter is required. A 1231 Oxygen probe has an integral type K thermocouple which is used to control the sensor temperature.
3. If your process requires a specific length probe not listed in the table above, contact Novatech to discuss non-standard lengths.

Ordering Information 

Probes are made to order based on the following information;

• Probe Type - 1231 or 1232
• Probe insertion length. Available lengths are displayed in the table above
• Weather-proof plug or screw terminal connections
• No filter / Sintered 30μm or 15μm titanium alloy filter (1231 only)
• Process connection thread type NPT by request
• Non standard thermocouple type (1232 only)
• Cable supplied with plug connector or no connector