New Guided Radar Liquid Level Sensors from Danfoss

By team, Nov 18, 2011, 14:17 2 minute reading

Danfoss introduces a new range of guided radar liquid level sensors for industrial refrigeration. The AKS 4100/4100U features high flexibility and reliability and is designed to measure liquid levels of many different refrigerants, including CO2, in vessels, accumulators, receivers, standpipes, etc.

All sensors in the new AKS 4100/4100U family are easy to install and fully flexible. No on-site calibration is needed, and the probe length can easily be adjusted on site. Danfoss’ new sensors can be used with all non-flammable refrigerants, including CO2 and can be with or without an HMI display unit and in various lengths. While the AKS 4100 has a G1 in. pipe thread connection, the AKS 4100U has a ¾ in. NPT connection.

Basic specifications AKS 4100 and AKS 4100U
The AKS 4100/4100U with coaxial probe are specifically suited for CO2 applications. They are suitable for all industrial refrigeration applications including marine applications. The coaxial version can be supplied with or without an HMI display unit and in a variety of lengths:
  • AKS 4100 from 500 mm up to 2200 mm
  • AKS 4100U from 19.2 in. up to 85 in
The optional display unit is used for commissioning and quick on-site setup and is easily mounted on the AKS 4100/4100U. The display unit supports multiple languages and both SI and US units.

The Guided Radar (TDR technology - Time Domain Reflectometry) measuring principle

The AKS 4100/4100U signal converter emits low-intensity, high frequency electromagnetic pulses with a width of approximately 1 nanosecond, which travel at the speed of light along the probe down to the liquid surface.

The pulses are reflected by the liquid surface, guided back along the probe, and received and analysed by the AKS 4100/4100U signal converter and then converted into a liquid level reading. This method is called Guided Radar (Time Domain Reflectometry (TDR).

About Danfoss

Danfoss is a global leader providing efficient solutions that help save energy and meet the challenge of climate change. Its key competencies are cooling of food, air conditioning, control of electrical motors and heating in buildings – as well as solutions for renewable energy such as solar power. Today Danfoss employs 23,500 employees globally and has 110 sales companies around the world.


By team (@r744)

Nov 18, 2011, 14:17

Related stories

Sign up to our Newsletter

Fill in the details below