| Measuring principle | Electrochemical oxygen sensor |
| Measuring range | 4, manual changeover 0 … 10, 0 … 100, 0 … 1000, 0 … 10000 ppmv |
| Analogue signal port | 0 … 10 V, 0 (4) … 20mA |
| Reproducability | +/- 2 % of the measuring value |
| Resolution | 0,01 ppm – C(O2) – 1 ppm depending on the O2 concentration |
| T90-Time | ca. 40 seconds |
| Display | 3 ½ digit LCD display |
| Messages | 2 free adjustable messages in relation to the O2 concentration |
| Gas connection | inlet / outlet 3 / 6 mm ferrule pack |
| Gas sampling | built-in inlet / outlet valve flowmeter |
| Sample flow | min. 20 Nl/h, max. 40 Nl/h |
| Sample pressure | (inlet) min. 1,01 bar abs., max. 2 bar abs. |
| Sample pressure(measuring cell) | max. 50 mbar pressure |
| ambient operating temp. | - 0 °C up to + 45 °C |
| Relative humidity of the gas | 0 … 99 % not condensing |
| Power supply | 110 or 230 VAC / 60 - 50 Hz |
| Protection / Housing / Dimensions | IP 65 / wall mounting housing 300 x 250 x 320 mm IP 54 / 63 TE, 3 HU portable housing IP 20 / 19“ rack 3 HU IP 20 / ½ 19“ electronic housing, 3 HU IP 20 / ½ 19“ cassette |
| Weight | 8-10 kg |
| Options | gas pump pressure reducer (max 10 bar in, 50 mbar out) automatical bypass- and purge valve analogue outlet galvanically separated particle filter 2-7μm manual 5 way valve charging unit protective case electronically flow control / -alarm |
The measuring gas diffuses through a membrane to a thin layer of electrolyte. At the cathode the
oxygen reduces. The free flowing electrons are drifting to the Anode. This generates a electrical
current which is direct proportional to the oxygen concentration of the measuring gas. The use of
electrochemical sensors allows in standard applications the measurement of trace oxygen in a number of complex and aggressive gas mixtures. The fitting sensor for a specific application has to be selected considering the different available electrolytes and electrodes. It is therefore essential to know the physical and chemical application parameters such as temperature, gas pressure, humidity content and the consistency of a specific measuring gas.
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