Permalevel® SINGLE POINT

Non-Invasive Constant Level Monitoring Technology

The Permalevel® Single Point is a fixed-level monitoring device designed for use in a variety of industrial, safety and manufacturing applications. 

The sensor, placed on the outside of the tank, can trigger an alert if the liquid level rises or falls below a fixed point, sending a 4-20mA output to interact with other equipment. 

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Non-invasive level monitoring system

The Permalevel® Single Point is designed to offer maximum flexibility across a wide range of fixed-point level monitoring applications. The main principle of the system involves fixing an ultrasonic sensor to a critical position on the side of the container being tested. This critical position can be found and verified using a Portalevel® unit and the Portasteele® Calculator. The unit will then non-invasively monitor whether or not liquid is present inside the cylinder at this point. As soon as the liquid level rises above or falls below this point, this will trigger an alert from the Permalevel® Single Point. This alert can interface with any alarm or management system operating in the facility. There are a wide variety of applications for this system, including pressurised cylinders, storage tanks and pipes. 


What's In The Box

  Portalevel® Max Marine Unit:Fixed, mains-powered main unit with digital display for readings and a 2-20mA output
  Permalevel® Single Point Sensor:Piezoelectric ultrasonic sensor with magnetic applicator
  Silicon Grease:Long-lasting ultrasonic coupling grease for fixed sensor application
  Operating Manual:Contains further information regarding the functionality of the instrument and how-to-use
  Calibration Certificate:As evidence that the unit has been tested and shown to be working before dispatch

Technical specifications

Technical Specification
  • Height: 168mm
  • Width: 82mm
  • Depth: 31mm
  • Weight: 400g

Piezoelectric ultrasonic sensor with magnetic applicator 



Power Supply

Mains power 

Operating Temperatures

-10°C to +65°C / 14F to 149F

Enclosure Rating

IP65 Rating

  • Main unit – 3 Year Warranty
  • Sensor –  1 Year Warranty
  • Technical Support – Lifetime of the unit

See the Permalevel® SINGLE POINT in action.

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Frequently asked questions

Yes, it can, providing that the temperature of the CO2 container is kept reasonably stable. The density of CO2 can vary quite considerably with temperature, so if your cylinder is kept outdoors where temperature may vary greatly, the Permalevel® Single Point may not be suitable. In fact, at temperatures above 31°C, it is not possible to use any liquid level indicator for CO2 monitoring, as it will reach its critical temperature and there will be no liquid level.

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The Portasteele® CALCULATOR is the perfect partner to any of Coltraco Ultrasonics’ liquid level detectors. It allows you to convert your measured liquid level to an agent weight, precisely and accurately. These readings can then be saved and exported for future reference and traceability. 

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