Toxic gas detecting alarm
The utility model discloses a two-wire-system intrinsically-safe/explosion-proof toxic gas detecting alarm, which comprises an electrochemical sensor circuit, a microprocessor, a temperature sensor, a display, a 4-20mA current signal circuit and a power supply circuit, wherein the output of the elec...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Online-Zugang: | Volltext bestellen |
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| Zusammenfassung: | The utility model discloses a two-wire-system intrinsically-safe/explosion-proof toxic gas detecting alarm, which comprises an electrochemical sensor circuit, a microprocessor, a temperature sensor, a display, a 4-20mA current signal circuit and a power supply circuit, wherein the output of the electrochemical sensor circuit is connected with the input of the microprocessor after analog-digital conversion; the output of the temperature sensor is connected with the input of the microprocessor after analog-digital conversion; the output of the microprocessor is connected with the display; the output of the microprocessor is connected with the 4-20mA current signal circuit after analog-digital conversion. The utility model has the advantages that the measurement accuracy of the detecting alarm is high, the anti-interference performance is high, the defects of temperature drift, time drift, false alarm and the like existing in the prior art are overcome and the detecting alarm can fully satisfy the requirements o |
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