We speak frequently about the various applications where level sensing is used and how to best provide accurate measurements. But for this post though, we’ll be going back to basics to overview some of the most important things to consider when you are choosing a level sensor. After all, this decision will be the measure that keeps your machines and operations running smoothly and safely.
Step 1: Determine the Substance & What Must Be Measured
This is perhaps one of the most important factors in choosing a level sensor. Different liquids characteristics must be considered to make an accurate measurement. For example, highly viscous liquids like oils and grease can change the sensor requirements.
Other factors that affect monitoring a liquid level is factoring in if there could be build up in the tanks if it will be sticky or corrosive, and even the specific gravity of the liquid (the ratio of the object’s density to that of water). In addition to the liquid being measured, you must also consider the tank that’s holding the material as its part of the larger picture.
For example, if there are limits to how the sensor is mounted to it, if the temperature inside must remain a certain degree or if there are pressure requirements or vibrating conditions that could possibly alter the accurate measurement, you’ll need to consider these factors in advance.
Determine if switching or continuous level monitoring is required for the application prior to making a selection. Also, submersible sensors placed inside a tank or those that are mounting externally are options you’ll need to choose from.
Step 2: Consider Conditional Factors
Outside of the most basic elements detailed above, you’ll need to also consider conditional factors that could change your options for level monitoring.
Can the contents inside the tank make contact with the sensor at all? Will it affect performance over time if so? Level sensor options will change based on these details.
- Pressure sensors provide accurate measurements using the measure of the bottom and open space within a tank.
- Float switches work by measuring the level of a liquid-based on its ability to float on the surface. They can be mounted vertically or horizontally and mounted on the inside or outside of a tank.
- Ultrasonic level sensors use waves and echoes to measure a substance’s level and service.
Gathering as much information as possible will arm you with key information to make the best decision for level sensors.
Have questions? Need Answers? Speak to the professionals at SMD Fluid Controls. We can make recommendations, build custom solutions that work for you and help you feel confident you’re making the right choice for your application.