Level sensors & Level switches

Optimise level measurement in your process

Reliably measuring levels of liquids and solids is crucial for many industries. Incorrect level measurement can lead to spillages, production downtime and safety risks. With modern level sensors, you can monitor levels in real time, optimise processes and prevent problems. At Swelex, we offer a wide range of level sensors and level switches to suit different media and applications.

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The importance of accurate level measurement

Correct level measurement is not just about knowing how much is in a tank - it's about making quick and accurate decisions. Accurate level data reduces the risk of overfilling, dry running and costly downtime. Our level sensors help you to always have accurate information, regardless of liquid or solid.


Dwyer Series CLT Level Transmitter

Continuous level transmitter with customised length and high precision.

  • Continuous level indication
  • Customised length, activation point & distance between floats
  • 4-20 mA or proportional voltage output
  • Material: 316 SS or Buna-N
  • Suitable for gas, oil and general level monitoring


Gems Solid-State Level Sensor ULS-200

Advanced and durable sensor for water, oil and hydrocarbon-based liquids.

  • Solid-state technology - no moving parts
  • IPX7 & IP6K9K, RoHS & CE
  • Resistant to deposits and residues
  • Customisable time delays
  • High reliability in OEM applications


Dwyer Series IEF Level sensors

High accuracy electromagnetic level sensor with flexible signal outputs.

  • LCD display and A-IEF-DSP
  • Measurement for flow 0-6 m/s, pressure up to 27.6 bar
  • Analogue, pulse, alarm and reset outputs
  • Adjustable for pipe sizes 4-36″ (101.6-914.4 mm)
  • Used for water, cooling systems, irrigation, process and wastewater applications


Gems Level Switch Series LS-3

Single-point level switch with small design and high performance.

  • Reed switch technology, long lifetime
  • Hermetically sealed against shock and vibration
  • Deviation <1% - high accuracy
  • FDA compliant materials, suitable for shallow tanks
  • LS-3 MICRO: compact version for small devices and liquids lighter than water


Gems Level Switch Series LS-7

Side-mounted single-point level switch with flexible mounting options.

  • 11 mounting options, possible mounting 180°
  • Material: polypropylene, nylon, Versaplast
  • NO or NC configuration
  • Ideal for small tanks & high volume vessels
  • Float switches, electro-optical, capacitive or ultrasonic sensors

Gems LS-1950 Series Level Switch

High-performance single-point level switch for demanding applications.

  • Withstands high temperatures & pressures in harsh environments
  • FDA Approved
  • Long lifetime and high reliability
  • Accurate level detection in oil, water & chemicals
  • Suitable for industrial processes

Types of level sensors

Continuous level sensor with float

  • Measures the liquid level with a float that continuously follows the surface
  • Used in oil and fuel tanks, water and wastewater systems
  • Advantages: robust design, high accuracy, easy installation

Electromagnetic level sensor

  • Measures level of conductive liquids without moving parts
  • Suitable for chemical industry and food production
  • Advantages: minimal maintenance, high reliability, corrosion resistant

Ultrasonic level sensors

  • Non-contact measurement with sound waves
  • Can measure liquids and solids
  • Benefits: eliminates contamination risk, flexible use, fast measurements

Level guards - security and control

Level switches are used to monitor and control levels. They activate alarms or automatic systems when levels reach pre-set limits. They are indispensable in processes where overfilling, dry running or incorrect levels can cause problems.

  • Protects against overfilling and dry running
  • Can control pumps, valves and alarms
  • Adapted for different liquids, solids and temperatures

 

Installation and maintenance

Proper installation and maintenance are essential for accurate measurement.

  • Always follow the manufacturer's instructions for installation
  • Calibrate regularly to ensure accurate data
  • Carry out inspections and fix problems in time to extend the lifetime

 

Why choose Swelex?

We offer:

  • A wide range of level sensors and level switches
  • Expert advice on product selection and installation
  • Support throughout the process - from selection to operation
  • Long experience in level measurement in industrial applications

FAQ - Frequently asked questions and answers

 

What is the difference between a level sensor and a level switch?

  • Level sensors continuously measure the level of liquid or material.
  • Level switches are switches that activate alarms or systems when a certain level is reached.

 

What type of level sensor is suitable for my application?

  • For liquids with high accuracy: float sensors
  • For conductive liquids in industry: electromagnetic sensors
  • For non-contact liquids or solids: ultrasonic transducers

 

Can level sensors be used in harsh environments?

  • Yes, many of our level sensors are built for corrosive liquids and harsh environments, including oil and chemical tanks.

 

How often do I need to calibrate a level sensor?

  • The recommendation is to calibrate at least once a year or according to process requirements to ensure accuracy.

 

Can level switches control pumps automatically?

  • Yes, level switches can be connected to pumps, valves and alarms for automatic control.