What's The Best Tank Level Sensor?

30 Dec.,2024

 

What's The Best Tank Level Sensor?

If you follow technological advancement in the workplace, you&#;ve probably heard about the Internet of Things (IoT). The IoT is fundamentally altering the game, and now is the time to participate.

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But where do you even begin? Tank level monitoring is one example.

Tank level monitoring (TLM) is an excellent first step towards becoming familiar with the IoT, whether you&#;re tracking frac tank levels for a well stimulation project or monitoring a straightforward water tank. The objective of tank level monitoring, as with any IoT project, is to gather accurate and trustworthy data so that you can take action and produce results. People won&#;t trust your tank monitoring system if your data is inaccurate, lacking, or late, and you won&#;t receive the desired business outcomes.

Tank level sensors are the &#;bedrock&#; of any solution for remote tank monitoring. Your sensors are the first stop on the data route for tank level monitoring since they produce the information that eventually supports decision-making. Nothing else matters if your tank level sensors don&#;t get reliable data. The greatest analytics and most attractive dashboards cannot compensate for subpar tank sensors.

Garbage in, garbage out, as the saying goes.

We wanted to discuss how to select the best tank level sensor for your project because of how crucial tank level sensors are to your whole tank monitoring system. You may purchase accurate and trustworthy tank sensors that generate excellent field data without spending a fortune with a little help.

Five Typical Tank Level Sensor Types

Tank level sensors come in five different categories:

Water-pressure sensors
Ultrasound detectors
Infrared sensors
Float detectors
Sensitive capacitors

Your application will determine which tank level sensor is ideal, so we&#;ll outline the main benefits and drawbacks of each sensor to assist you in making an informed decision for your tank level monitoring project.

Sensors for Hydrostatic Tank Level

A tried-and-true method for obtaining affordable, precise tank level data is using hydrostatic tank level sensors. These sensors are used to gauge the fluid column&#;s hydrostatic pressure. Typically, hydrostatics are mounted to discharge piping at the bottom of tanks, submerged in the liquid at the tank bottom.

Hydrostatic tank level sensors can be installed in various types of tanks without the need to create a new sensor because they are affordable, accurate, power-efficient, and have variable ranges.

Unfortunately, because hydrostatic sensors are frequently entirely submerged in liquid, they can experience greater failure rates. This can be quite difficult, especially with corrosive or caustic solutions. The cable gland, where fluids can enter and short circuit the delicate electronics that power the sensor, is one of the most frequent locations for failure in hydrostatic sensors.

Tank level ultrasonic sensors

Ultrasonic tank level sensors, as their name suggests, assess liquid levels using sound waves. They are installed on top of your tanks, use ultrasonic waves to &#;bounce&#; off the liquids&#; surfaces, and gauge level by timing how long it takes to hear the &#;echo.&#;

The fact that ultrasonic sensors are non-contact, meaning they don&#;t make direct contact with the liquid in the tank, is one of its key advantages. Fluid compatibility is less of a concern, and they can function effectively in tanks where the liquid contains mixers or other moving mechanical components (note that the mixers must be off for accurate level readings, as sloshing and turbulence interfere with ultrasonic sensors).

Additionally, the cost of these sensors is reasonable, ranging from $300 to $400 per sensor. If you want greater performance or hazardous area certifications, though, budget closer to $1,000.

The fact that ultrasonic sensors use a lot of electricity is one of their key drawbacks. They can need 10-100 times as much power as hydrostatic sensors, hence they are often not appropriate for battery-powered installations.

Additionally, compared to other sensors, ultrasonic sensors typically require more upkeep. They require precise installation, maintenance of a dead band or &#;blanking zone&#; between the sensor and the fluid, and periodic cleaning of the detecting device (some fluids can create a film that affects performance)

Last but not least, noise interference is a major threat to ultrasonic sensors. The ultrasonic waves that travel to and from your sensors can encounter problems if there is foam or vapor present.

Tank level sensors using radar

In that they gauge tank levels by the amount of time it takes radio waves to travel between the sensors and fluid surfaces, radar sensors are comparable to ultrasonic sensors in this regard. Like ultrasonic sensors, radar sensors are non-contact, which appeals to operators. However, compared to their sound-based predecessors, radar sensors are more accurate and better equipped to withstand interference because of more precise electronics.

 

Radar sensors are often substantially more expensive when compared to the other two gadgets we&#;ve discussed so far. A competent radar tank level sensor should cost more than $2,000 in total. Radar still requires a substantial blanking zone between the bottom of the sensor and the top of the tank despite the more precise electronics. It can be challenging to obtain precise measurements as tanks fill due to the fact that light waves move so much more quickly than sound.

One advantage of radar sensors is their ability to measure fluid interfaces, such as the presence of oil in water. Even a small amount of emulsion between the interface can be taken into account by more sophisticated electronics while maintaining reliable measurements.

Sensors for Float Tank Level

Float sensors extend a probe into the liquids near the bottom of your tank, and they have continuous detecting elements along the probe that are activated by floats. Float tank sensors may be made to be extremely accurate using this approach. They can even monitor fluid interfaces by utilizing numerous floats for various liquid densities because they don&#;t suffer from noise or interference issues.

Float sensors, on the other hand, can be very pricey. The price of a float sensor is almost immediately inversely correlated with tank height. You might pay $1,000&#;$2,000 for shorter tanks (less than 5 feet tall). On the other hand, larger tanks exceeding 25 feet may cost up to $3,000 or more.

&#;Sticking&#; is one problem that float tank sensors may have. Although some manufacturers&#; recent technological innovations have addressed this issue in some circumstances, it can still arise in certain circumstances. For instance, floats may adhere to the probes in liquids that result in sticky or waxy substances, leading to inaccurate static level measurements. Investing in oleophobic probes that don&#;t stick or performing routine cleaning can assist guarantee float sensors are accurate.

Sensors for capacitive tank levels
Capacitive sensors will be the final category we discuss. These sensors consist of two electrodes, which are conductive probes that protrude into your tank. These probes track variations in capacitance when the fluid level in the tank rises and falls to determine the amount of fluid present.

The adaptability of capacitive tank level sensors is one of its main selling points. They can be applied to a variety of media, including solids and powders that aren&#;t liquids. They are also comparatively affordable. Capacitive sensors fall somewhere between radar/float sensors and hydrostatic sensors in terms of cost compared to the other sensors we&#;ve covered.

It&#;s crucial to be aware of the sensitivity and susceptibility of capacitive sensors before making a purchase. Capacitive level sensor readings can be impacted by temperature, humidity, and fluid type. Capacitive sensors provide another degree of operational complexity by requiring operators to calibrate equipment while tanks are both empty and full.

What's The Best Tank Level Sensor?

 

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If you keep up with workplace technological advancements, you&#;ve undoubtedly heard of the Internet of Things (IoT). It&#;s time to get involved in the game because the Internet of Things is changing it fundamentally.

But how even do you start? One example is the monitoring of tank levels.

Whether tracking frack tank levels for a well stimulation project or keeping an eye on a simple water tank, tank level monitoring (TLM) is a great way to get started with the Internet of Things. Like any IoT project, the goal of tank level monitoring is to collect reliable and accurate data so that you can act and see results. If your data is incomplete, erroneous, or delayed, people won&#;t trust your tank monitoring system, and you won&#;t get the intended business results.

Any remote tank monitoring system&#;s &#;bedrock&#; is its tank level sensor. Since your sensors generate the data that ultimately aids in decision-making, they are the first point of contact on the data route for tank level monitoring. If your tank level sensors are not receiving accurate data, then nothing else matters. Poor quality tank sensors cannot be made up for by the best analytics or the most visually appealing dashboards.

As they say, &#;garbage in, garbage out.&#;

Given the importance of tank level sensors to your entire tank monitoring system, we wanted to talk about how to choose the best one for your project. With a little assistance, you can buy reliable and accurate tank sensors that produce top-notch field data without having to spend a fortune.

Five Common Types of Tank Level Sensors
There are five types of tank level sensors:

Pressure sensors for water
Ultrasonic sensors
Thermal sensors
Deployment sensors
Capacitive sensors

We&#;ll list the key advantages and disadvantages of each tank level sensor to help you make an informed choice for your tank level monitoring project. Your application will dictate which tank level sensor is best.

Hydrostatic Tank Level Sensors

Hydrostatic tank level sensors are a tried-and-true way to get accurate, reasonably priced tank level data. The hydrostatic pressure of the fluid column is measured by these sensors. Hydrostatics are usually installed on discharge piping at tank bottoms and submerged in the liquid there.

Because hydrostatic tank level sensors are reasonably priced, precise, energy-efficient, and have adjustable ranges, they can be installed in a variety of tank types without the need to create a new sensor.

Regretfully, hydrostatic sensors can suffer from higher failure rates because they are often completely submerged in liquid. This can be very challenging, particularly when dealing with caustic or corrosive solutions. One of the most common places for hydrostatic sensor failure is the cable gland, where fluids can get in and short circuit the sensitive electronics that power the sensor.

Ultrasonic Tank Level Sensors

As their name implies, ultrasonic tank level sensors use sound waves to determine the liquid level. They are mounted atop your tanks, &#;bounce&#; off the liquid surfaces using ultrasonic waves, and measure the level by timing the duration of the &#;echo.&#;

One of the main benefits of ultrasonic sensors is that they are non-contact, which means they don&#;t come into direct contact with the liquid in the tank. Less consideration is given to compatibility with fluids, and they can work well in liquid-containing tanks that have mixers or other moving mechanical parts (keep in mind that accurate level readings require turned-off mixers because turbulence and sloshing interfere with ultrasonic sensors).

These sensors are also reasonably priced, with prices between $300 and $400 per sensor. However, you should budget closer to $1,000 if you want certifications for hazardous areas or better performance.

One of the main disadvantages of ultrasonic sensors is how much electricity they consume. Their power requirements can be up to 100 times higher than those of hydrostatic sensors, which makes them unsuitable for battery-operated installations.

Additionally, ultrasonic sensors usually need more maintenance than other types of sensors. They need to be installed precisely, have a dead band, or &#;blanking zone,&#; maintained between the fluid and the sensor, and have the detecting device cleaned on a regular basis (some fluids can create a film that affects performance)

Not to mention, noise interference poses a serious risk to ultrasonic sensors. If there is foam or vapor present, the ultrasonic waves that travel to and from your sensors may encounter issues.

radar-based tank level sensors
Radar sensors are similar to ultrasonic sensors in that they measure tank levels based on the time it takes for radio waves to pass between the sensors and fluid surfaces. Operators find radar sensors appealing because, like ultrasonic sensors, they are non-contact. But thanks to more precise electronics, radar sensors are more accurate and more resilient to interference than their sound-based predecessors.

 

Generally speaking, radar sensors are significantly more costly than the other two devices we&#;ve covered so far. The total cost of a good radar tank level sensor should be more than $2,000. Despite the more accurate electronics, radar still needs a sizable blanking zone between the top of the tank and the bottom of the sensor. Because light waves travel so much faster than sound, it can be difficult to take accurate measurements as tanks fill.

The capacity of radar sensors to measure fluid interfaces, such as the presence of oil in water, is one of their advantages. More advanced electronics can account for even a small amount of emulsion between the interface and still maintain accurate measurements.

Level Sensors for Float Tanks

Float sensors use a probe to reach into the liquids close to the bottom of your tank. Floats activate continuous detecting elements along the probe. With this method, it is possible to achieve incredibly accurate float tank sensors. Because they don&#;t have interference or noise problems, they can even monitor fluid interfaces by using multiple floats for different liquid densities.

However, the cost of float sensors can be extremely high. Tank height and float sensor prices almost immediately correlate inversely. Price ranges for shorter tanks (those under five feet tall) could be $1,000&#;2,000. Larger tanks, however, that are longer than 25 feet, can cost as much as $3,000.

One issue with float tank sensors is &#;sticking.&#; Even though this problem has been partially resolved by manufacturers&#; recent technological advancements, it may still occur in specific situations. For example, in liquids that produce sticky or waxy substances, floats may stick to the probes and cause inaccurate static level readings. Making regular cleanings or investing in non-stick oleophobic probes can help ensure the accuracy of float sensors.

Capacitive Tank Level Sensors

We&#;ll talk about capacitive sensors as our final category. The two electrodes in these sensors are conductive probes that stick into your tank. To measure the amount of fluid present, these probes measure changes in capacitance as the fluid level in the tank rises and falls.

One of the key features that makes capacitive tank level sensors so appealing is their versatility. They can be used on a range of media, such as non-liquid solids and powders. They are also reasonably priced. In terms of cost relative to the other sensors we&#;ve covered, capacitive sensors lie in between hydrostatic and radar/float sensors.

Before making a purchase, it is important to understand the sensitivity and susceptibility of capacitive sensors. Readings from capacitive level sensors can be affected by fluid type, temperature, and humidity. Another layer of operational complexity is added by capacitive sensors, which necessitate that operators calibrate equipment while tanks are both full and empty.

 

Contact us to discuss your requirements of Liquid Level Transmitters. Our experienced sales team can help you identify the options that best suit your needs.