Electronic Circuits and Tutorials
Electronics Schematics - L

Fluid Level Monitors Circuits

Fluid Level Detector - Here is a simple but versatile circuit of fluid level detector which can be used for various applications at home and in industry. Circuit is built around 2-input NAND Schmitt trigger gates N1 and N2. Gate N1 is configured as an oscillator operating at around 1 kHz frequency. When the fluid level reaches the probe’s level, the oscillations are coupled to the diode detector stage comprising diodes D1 and D2, capacitor C4 and resistor R2.

Fluid Level Detector #2: Circuit is built around2-input NAND Schmitt trigger gates N1 and N2. Gate N1 is configured as an oscillator operating at around1 kHz frequency.

Sonar like method detects fluid level: 07/19/2001 EDN - Design Ideas / Figure 1 illustrates a simple, cost-effective method of measuring the height of fluid in a column by using ultrasonic waves. Two piezoelectric transducers generate and listen to the ultrasonic acoustical wave.

LM1830 flow switch circuit fluid level - An very simple flow switch circuit can be designed using the LM1830 fluid level detector device that sense the presence or absence of aqueous solutions. Using this flow switch circuit you can implement HIGH and LOW limit control controlling the operation of pumps or solenoid actuated valves. The LM1830 is a monolithic bipolar integrated circuit designed to detect the presence or absence of aqueous fluids.

Fluid level control schematic diagrams - The LM1830 fluid level detector circuit is a device intended to signal the presence or absence of aqueous solutions, featuring low external parts count, wide supply operating range, internally regulated supply and AC or DC output.

LM1830 based liquid level indicator circuit - LM1830 is a monolithic integrated circuit that can be used in liquid level indicator / control systems. Manufactured by National Semiconductors, the LM1830 can detect the presence or absence of polar fluids . Circuits based on this IC requires minimum number of external components and AC signal is passed through the sensing probe immersed in the fluid. Usage of AC signal for detection prevents electrolysis and this makes the probes long lasting. The IC is capable of driving a LED, high impedance tweeter or a low power relay at its output.

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