An ultrasonic liquid level sensor is a device that converts the liquid level into an electrical signal. Other instruments can then use the liquid level signal output to visualize, analyze, log, or regulate the liquid level, read more.
How they work
Ultrasonic level sensors use the speed of sound to operate on the “time of flight” concept. The sensor sends out a high-frequency pulse, usually between 20 and 200 kHz, then waits for the echo. The pulse is conveyed as a cone, with the apex commonly at around 6 degrees. The pulse strikes the level surface and is reflected in the sensor. Before being sent to the transmitter for signal processing, it serves as a receiver. The distance to the material’s surface is calculated by dividing the duration between the pulse and its echo by two. This equals the distance between the transmitter and the material’s surface. The transmitter is programmed to only listen for the most significant amplitude return pulse (the echo) and hide all other ultrasonic signals in the vessel. The sensor physically vibrates or “rings” due to the pulse’s high amplitude. Think of a hammer striking a stationary bell. The “blanking distance,” which ranges from 12 in. to 18 in. (300 mm to 450 mm), is intended to prevent sensor ringing from causing erroneous readings. This is critical for installation when the distance above the level surface must be kept to a minimum.
Advantages of ultrasonic liquid level indicators
• Due to the high-frequency pulsation and exact transit time measurement, there is a high level of precision.
• High-temperature fluid compliance for vertically positioned sorts since no sensitive components contact the fluid.
• It uses conductive and non-conductive fluids.
• The performance will be unaffected by a sealed pressurized vessel.
• Blocking distance is shorter compared to radar.
• Measurement performance can be harmed by foaming, splashing, vapor, and dampness.
• In comparison to other technologies, it has a high cost.
• Only the top may be mounted.
• When operating at a liquid level, a minimum blocking distance is required.
• Temperature compensation is necessary to correct the speed of sound varying with air temperature.
• Sound waves are unable to travel through a vacuum.
• Radar has a shorter range than this.
Why choose ultrasonic liquid level indicators for fire suppressions:
1. Faster; Constant contents monitoring refers to testing that occurs while the fire suppression cylinders are in place and operating without the need for user intervention. These systems notify the user when a leak occurs before the contents have drained beyond the system’s capacity, allowing you to schedule repair and avoid unplanned downtime.
2. Better; Utilizing continuous monitoring technology to inspect the levels of your fire suppression cylinders is non-invasive, non-destructive, and non-disruptive, which means it is safer for people and does not need shutting down the fire suppression system. Constant monitoring systems provide you with peace of mind around the clock, knowing that your systems are fully operating and precisely monitored during and between maintenance times.
Sustaining fire damage is only feasible if the fire is put out before it has a chance to develop ultimately. Even with the most significant equipment, after a fire has spread all over the premises with full intensity, there is very little that firefighting troops can rescue. As a result, having the appropriate instruments installed that can aid or control fire on their own in its early phases is critical. When flames ignite, they raise the surrounding area’s temperature, and if automated heat detectors are activated, they sound the alert immediately.
Without directly touching the liquid or gas, the ultrasonic liquid level indicator instrument can detect the level of liquids inside a single skinned container. It can measure any type of container and any type of liquid or gas, therefore it doesn’t matter if the levels are low or high. Ultrasonic waves travel through the container’s walls and detect the contents inside.