A quick guide to types of liquid level sensors and controls from basic high and low level floats to advanced guided pulse radar level meters. Aslans level probe holder system is discussed as a means of providing a reliable means of connecting level monitoring probes without exposure to the harmful effects of corrosion. A major problem with many level probes is the electrical connections are often exposed inside the process tank and can be subject to attack by corrosive chemicals being used in the tank. This is a major problem because it can cause the failure of level monitoring equipment and result in liquid spills and even worse a hazardous waste cleanup emergency. Aslans design keeps the electrical connections outside the tank inside a sealed junction box where they are protected from the elements and the effects of process chemicals For more information please visit: http://aslantech.ca/index.php/chemical-makedown/liquid-level-sensor

1. Liquid Level Measurement
devices

2. Aslan level probe holder
www.aslantech.ca

3. • Installed in top of tank
• Connections outside away from corrosion
• Intrinsically safe
• Multiple probes measure different levels
• Excels in hazardous environments

4. Float Switch
www.fluidswitch.com

5. Float switches
• Proven technology
• Simple, dependable and low cost
• Widest variety of mounting locations
• Used to sense high level, or low level
• Mechanical parts can break or jam

6. Magnetic Level Sensor
www.mtssensors.com

7. • Pulses sent down tank mounted waveguide
• Floating magnet position affects the pulse
• Length of time of pulse determines level
• Intrinsically safe, explosion proof
• Can sense slurries, powders and liquids
• Limited by length of waveguide

8. Capacitive Level Sensor
www.gillsc.com

9. Capacitive Level Sensor
• No moving parts
• Range depends on length of probe
• Useful for slurries & powders as well as liquids
• Limited to small tanks due to probe breakage

10. Tape Level Sensor
www.milontech.com

11. • Immersed in liquid
• Simple method of monitoring level
• Hung inside pvc pipe
• Relatively fragile
• Connections may corrode

12. Radar level sensor
www.ifm.com

13. • Radar signals guided down to liquid by probe
• Bounce off media being measured
• Can measure more than just liquid levels
• Limited by available probe length

14. • If you have a liquid level measuring problem,
Aslan can design a system that efficiently
meets production and process needs.

15. Aslan Technologies
5044 South Service Road
Burlington, Ontario
905-632-4968
www.aslantech.ca