Our OT-200S is a particularly robust and durable transmitter for continuous measurement and monitoring of oxygen concentration in
- Inert gases
- Process gases
- Glove-Boxes (also in combination with our AQUATRACE® ATT520 trace moisture transmitter)
- Furnace atmospheres
- Flue gases
The use of the measuring system in explosive gas mixtures is strictly prohibited! The probe is an ignition source!
Characteristics:
- Continuous measurement of the oxygen concentration of a sample gas
- Signal processing of measured values
- Measured value output via standard interface
- Process monitoring via standard interface
Important information for the intended use:
The requirements and limit values specified in the "Technical Data" must be strictly adhered to. Any use beyond this is considered to be improper.
The use of the measuring system in potentially explosive atmospheres and the measurement in explosive gas mixtures, in gases with a high concentration of halogens and sulphur-containing gases (e.g. SO2) are not permitted.
During operation, the probe is heated electrically. The probe shall be placed or installed in such a way as to avoid burns caused by the strongly heated front part of the probe.
Measuring principle:
Potentiometric measurement. The measuring system contains a sensor that uses the oxidation ion conductivity of zirconium dioxide ceramics with stabilizing additives. The oxide ionic conductivity of zirconium dioxide increases exponentially with temperature and reaches sufficiently high values above 600 °C. The ceramic oxide ion conductor is used as a gas-tight tube with platinum electrodes inside and outside. The reference electrode is purged with air; it serves as a reference electrode with constant, known electrode potential. The measuring electrode is located in the sample gas stream.
Executions:
- Flange design (DN40; DN25)
- G1/2" screw-in thread
- Remote evaluation unit
Specifications |
|
| Measuring range: | 20.6 vol.-% ... 15 ppm O2 20.6 ... 0.1 vol.-% O2 |
| Installation length: | 80 mm (incl. G1/2"), 70 mm (DN40 KF) (others on request) |
| Mass: | approx. 0.75 kg |
| Dimension: | 230mm (H) x 80mm (W) x 60mm (D) |
| Protection: | IP 65 |
| Operating voltage: | 24VDC |
| Heat-up time: | approx. 5 min (due to thermal balancing processes, the operational readiness is only reached after 60 min.) |
| Accuracy: | < 5 % relative error |
| Operating temperature: | 700 °C |
| Working temperature: | exhaust gas temp. 300 °C |
| Ambient conditions: | 0... 50 °C, rH < 85 % |
| Flow rate of sample gas: | 10 m/s (>10 m/s: immersion sleeve recommended) |
| Reference gas: | Air (supply by diffusion) |
| Storage: | 10... 50 °C, rH < 85 % |
| Cross sensitivity: | none, (but oxidizable gases consume O2, equilibrium oxygen is measured) |
| Pressure dependence: | In case of deviations from the normal pressure, the measured value must be corrected: corr. Value = MW x gas pressure/101325 Pa |
Electronics |
|
| Fuse: | 5A, self-resetting |
| Conditions: | 0... 50 °C, 0... 95 % relative humidity (others on request) |
| Storage: | 20... 60 °C, 0... 95 % relative humidity |
| Power supply: | 24 V DC +/- 10 %, approx. 60 mA, plus electricity heating supply |
Interfaces |
|
| Analog out: | 4... 20 mA (Option: 0... 20 mA, 0... 10 V, 2... 10 V; must be specified when ordering), isolated 500 V DC, load max. 500 Ohm |
| Serial interface: | RS232 (connection cable ordering option),transmission rate: max. 9600 baud, adjustable |