Level sensor

Level sensor

A level sensor is a type of sensor that is designed to detect the level of liquid, oil, or liquefied solids in either an open system or a closed container. It works by using two capacitances, Cair and Cncl, which are expressed by Equations (2) and (7) respectively, and are formed by the outer and inner sensing cylinders of the sensor.From: Handbook of IoT and Big Data [2019], Performance Enhancement of Capacitance-Type Level Measurement System using CCII-Based Interface [2020]

Smart Waste Bin Using AI, Big Data Analytics and IoT

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Published in Biswaranjan Acharya, Satarupa Dey, Mohammed Zidan, IoT-Based Smart Waste Management for Environmental Sustainability, 2022

Nivedita Das, Jyotiprakash Panigrahi, Chandrima Roy, Biswaranjan Acharya

A level sensor is a system that monitors, maintains, and measures liquid (and sometimes solid) levels [28]. Once the liquid level has been detected, the sensor converts the perceived data into an electric signal. There are seven main level sensors. These are capacitance, ultrasonic, microwave/radar, vibrating, conductivity, optical level switches, and float switches. A level sensor is shown in Figure 3.11. This IR level sensor is always generic; no specific model is used. It checks the level of the smart bin, meaning it checks the status of the bin. The status is semi-critical, critical, and not-critical [29].

Performance Enhancement of Capacitance-Type Level Measurement System using CCII-Based Interface

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Published in IETE Technical Review, 2020

Siddharth Bardiya, B. Vasuki

Figure 11 shows that the level sensor acts as a combination of two capacitances; Cair (part of the sensor above liquid level), which is expressed by Equation (2) and Cncl (capacitance formed by outer sensing cylinder and inner sensing cylinder), expressed by Equation (7). Capacitances Cncl and Cair are connected in parallel and hence the equivalent capacitance of the complete sensor is given by Ch from Equation (8). Theoretical analysis of the variation of capacitances for change in the level of conducting liquid is shown in Figure 12.

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Smart Waste Bin Using AI, Big Data Analytics and IoT

Performance Enhancement of Capacitance-Type Level Measurement System using CCII-Based Interface