Oxygen sensors
We differentiate between two typical oxygen measuring systems:
- Inline Oxygen Measuring
- Extractive Oxygen Measuring
Sensors, which extend into the process, are called inline sensors.
Sensors, which require measuring gas to be taken from the process, are called extractive sensors.
In order to account for the manifold measuring requirements and conditions at the measuring locations, our many years of experience have led us to develop a number of versions of oxygen sensors and electronic measuring devices.
Oxygen sensor A19-N
The sensor is built into a stainless steel body, which has an aluminium housing with plug connection serving as the connection head.
In principle the sensor can be mounted in any position. However, we recommend assemblies with the connection head positioned at the top. The connection head has a multi-pin plug, to which the connecting cable leading to the converter module is attached.
The sensor requires a series U or Z supply unit in order to
function.
Please refer to the unit's operating instructions for additional
information.
Technical data A19-N
|
Measuring range |
100 % up to 10 exp. -31 bar O2 |
|
Ambient temperature |
-10 to 80 degrees Celsius |
| Max. sample gas temperature |
200 degrees Celsius |
|
Measuring accuracy |
plus/minus 1 mV of the sensor's EMK |
|
Sensor heating-up time |
ca. 5 minutes |
|
Measuring speed |
ca. 2 seconds |
|
Weight |
ca. 1 kg |
|
Connection head dimensions |
Diameter ca. 70 mm, height 75 mm incl. plug |
|
Mounting depth |
30 mm,
|
|
Screw-in thread |
M27x2 mm (alternative M4 = special designs A19-S) |
A19 Manual (PDF) Oxygen sensor A19-P
Extractive oxygen sensors for stationary use can be easily adapted to the method. Zirconium oxide as measuring principle allows an universal use. Bodies of stainless steel and aluminium top join industry standard and insensitivity.
At sensor A15 the measuring gases are withdrawn from the test area and passed through the sensor.
These sensors have to be connected with a measuring module or a supply module.
Technical data A19-P
| Incorporation position | No limitation | |
| Gas entry | G 3/8 inch | |
| Gas exit | G 1/4 inch | |
| Measuring principle | Zirconium oxide | |
| Gas flow | 50 to 80 l/h. The flow is generated by overpressure of unit or by differential pressure of unit or by pump. | |
| Condensate protection | For the attachment of the gas pipes an inclination of the pipes away from the sensor is important so that the condensate which optionally crops up cannot flow into the sensor. | |
| Electrical connection | Within the connection top there is a multipole plug at which the connecting cable to the transformer module or the measuring module is connected. | |
| Material connection top | Aluminium housing
|
|
| Material sensor part | Stainless steel V2A | |
| Heating | About 500 degrees by connection to the measuring module of series ‘Z’ or ‘U’. |
A19 Manual (PDF)
Oxygen sensor A15-N
Technical Data A15-N
| Measuring range | 100% bis 10 Exp. -31 bar O2 |
| Ambient temperature | -10 bis 70 Grad Celsius |
| Measuring accuracy | plus/minus 1 mV der Sensor EMK |
| Heating-up time of the sensor | ca. 5 minutes |
| Measuring speed | ca. 2 seconds |
| Weight | ca. 2 kg |
| Connection head dimensions | HxWxD 80x120x120 mm |
| Sensor dimensions | height
70 mm, diameter 50 mm |
| Screw-in for gas way in | 3/8 Zoll G |
| Screw-in for gas way out | 1/4 Zoll G |
Oxygen sensor CMM / CSM
Inline oxygen sensors directly measure in the high temperature process. Zirconium oxide as measuring principle allows an excellent interpretation for heat treatments, especially in the field of oxidation, reduction and carburizing. Highly alloyed stainless steel and special ceramics guarantee long-term stability and corrosion control.
The oxygen sensor of the CM type series has been developed especially for inline measurement at gas carburizing.
As external protecting tube for the standard version a steel 1.4841 is used. Special alloys if desired are available. Operational temperatures of 700 to 1.000 degrees are covered.
The CSM type series has been developed especially for inline measurement in oxidizing and reductive atmospheres.
As external protecting tube in the standard version a ceramic material of
aluminium oxide with an internal electrode of platinum is used.
A special
use at high temperature carburizing is intended.
Operational temperatures
of 700 to 1.400 degrees are covered.
Technical data C-Sensor range
| Type | Installation length | Protecting tube |
| CMM-700S | 700 mm | 1.4841 |
| CMM-900S | 900 mm | 1.4841 |
| CSM-700S | 700 mm | Ceramic |
| CSM-900S | 900 mm | Ceramic |