Liquid level alarm for strong acid and strong base solution

• Main Author: CHENG XINWEN
• Format: Patent
• Language: Chinese; English
• Published: 19.03.2014
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The utility model discloses a liquid level alarm for strong acid and strong base solution. The liquid level alarm comprises a direct current power source, resistors one to nine, capacitors one to three, a first inductance coil, a second inductance coil, a first audion, a second audion, a comparator, a slide rheostat, a light-emitting diode, a voltage-stabilizing diode and a loudspeaker. The liquid level alarm is designed for the strong acid and strong base solution, comprises a liquid level sensor and a signal processor and does not need to make contact with the solution directly. A floater comprising an iron wire is arranged on the surface of the solution, the change of the liquid level influences the motion of the floater and enables the potential of a certain point to be changed, a circuit works again, and then the liquid level can be measured. In addition, the circuit is simple in structure, small in size and low in cost, and the elements of the circuit are reduced. Due to the fact that the liquid level a