Water level alarm capable of continuously working for long time

Abstract

The invention discloses a water level alarm capable of continuously working for a long time. The water level alarm comprises a triode Q1, a triode Q2, a triode Q3, a resistor R1, a resistor R2, a resistor R3, a capacitor C, a loudspeaker Y, a power supply and two probes S, wherein a collector electrode of the triode Q1 is connected with an anode of the power supply; an emitting electrode of the triode Q1 is connected with a collector electrode of the triode Q2; an emitting electrode of the triode Q2 is connected to a base electrode of the triode Q3; an emitting electrode of the triode Q3 is grounded; one of the probes is connected to a base electrode of the triode Q1; the other probe S is serially connected with the resistor R1 and then is connected to the anode of the power supply; one end of the resistor R2 is connected to the emitting electrode of the triode Q1; the other end of the resistor R2 is connected to a base electrode of the triode Q2; one end of the capacitor C is also connected with the base electrode of the triode Q2; and the other end of the capacitor C is grounded. By the structure, current consumed by a circuit is quite low, a battery is not required to be changed frequently, and the water level alarm can work for a long time.

Description

technical field [0001] The invention relates to the field of water level alarms, in particular to a water level alarm with long continuous working time. Background technique [0002] Under different circumstances, when the water level is lower or higher than the warning line, it will bring certain hazards, so a water level alarm is needed to detect the water level in real time. The water level alarm is used to alarm the water level through mechanical or magnetic induction. It can control the start or stop of water pumps and other equipment at the same time through the sound and light alarm or magnetic alarm. The water level alarm can alarm through the electronic water level switch or float switch. The principle of the electronic water level switch is to detect the water level through the electronic probe, and then process the detected signal by the special chip for water level detection. When the measured liquid reaches At the action point, output a high or low level signal...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a water level alarm with a longer continuous working time to solve the problem that the current low water level alarm consumes a lot of power, which is not conducive to long-term use, and frequent battery replacement also makes the operation very troublesome.

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