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Gas transmitter - ADOS TOX 592
The ADOS TOX 592 gas sensor is suitable for continuous measurement of a concentration of toxic gas in air, over the range of 0-20 ppm to 0-1000 ppm.
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Gases and Measuring Ranges
| Gas | Formula | Measuring Range |
|---|---|---|
| Carbon monoxide | CO | 0 - 300 ppm |
| Ammonia | NH3 | 0 - 200 ppm |
| Nitrogen dioxide | NO2 | 0 - 30 ppm |
| Sulphur dioxide | SO2 | 0 - 50 ppm |
| Hydrogen sulphide | H2S | 0 - 20 ppm |
Technical Data e.g. CO sensor
| Measuring principle: | Electro-chemical reaction |
| Measurable substance: | Carbon monoxide |
| Measuring ranges: | 0-150 ppm, 0-300 ppm, other ranges on request |
| Zero error: | <10 ppm CO |
| Reading instability: | < 3 ppm CO |
| Accuracy: | ± 3% of f.s.d. |
| Zero drift: | < 2% per year |
| Repeatability: | < 2% per year |
| Linearity: | < 2% of f.s.d. |
| Response time (t90): | < 60 sec. |
| Cross sensitivity: | < 2% with integrated filter |
| Interface: | two-wire current interface 4-20 mA or LON® four-wire techniques, data transmission 78 kbps |
| Supply voltage: | 15V - 30V dependent on maximum load 100 - 500 ohm |
| Ambient temperature: | -10 °C to 40 °C, with sensor temperature compensation |
| Humidity range: | 10 - 99%, non-condensing |
| Serviceable life of cell: | approx. 2 years |
| Protection class: | IP 30 |
| Sensor dimensions: | diameter 80 mm, height 80 mm |
| Weight: | 600 g |
| Test certificate: | To german standards, according to VDI 2053 in conjunction with ADOS Multitronik 592 |
Reaction at the anode:
CO H2O Þ CO2 2H 2e-
Reaction at the cathode:
½ O2 2H 2e- ÞH2O
CO H2O Þ CO2 2H 2e-
Reaction at the cathode:
½ O2 2H 2e- ÞH2O
Function Example, CO-sensor
The (H+)-ions and the electrons released, are consumed at the electrode in a cathode reaction.
The flow of current between anode and cathode, generated by this process, is directly proportional to the CO-concentration in the measured air.
The sensor current is amplified and applied via a 4-20 mA interface or via the LON® field-bus to an evaluation unit, e.g. ADOS Multitronik 592, where the measured variable is processed and indicated in ppm CO, together with any control and warning functions which may be necessary.
- In garages for measuring, control and warning, in conjunction with the ADOS Multitronik 592 tested to VDI 2053 standards
- For monitoring at working places, to control the maximum concentration value e.g. in laboratories or motor test stands
- In private and collective shelters for monitoring the external or internal air
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