AN ANNUNCIATOR FOR SENSING PRESENCE OF AMMONIA IN AIR AND A METHOD FOR THE SAME

摘要

ABSTRCT AN ANNUNCIATOR FOR SENSING PRESENCE OF AMMONIA IN AIR AND A METHOD FOR THE SAME An annunciator device (10) for sensing presence of ammonia in air comprises of a sensor chip, a sliding switch (101) for powering the device on and off and a circuit having a microcontroller(201) located at the centre of the circuit. A first green LED (102) is provided to indicate safe level of ammonia and a red LED (103) to indicate when the ammonia level goes beyond PEL. A sliding cap (104) is for replacing the battery and slot (105) for placing a sensor within the device. A second green LED (211) indicates that circuits of the device are powered and the device is in good health. Switch (212) resets the circuits. A power port (213) provides a battery power source. A pair of electrolytic capacitors (214,216) for eliminating undesirable supply harmonics, a voltage controller IC (215) and a 5 Volt regulated power supply port (218) are also provided. To be continued with Fig.1a