Flexible Level-Sensor

HBLT-wire is a capacitive sensor for level measurement of refrigerants in industrial refrigeration systems. The sensor has an output signal of 4-20 mA, which is proportional to the 0 and 100% level in the tank. HBLT wire can be adjusted in length to its current application, since the sensor element consists of a 2mm steel wire as well as a 4 mm Teflon tube, both of which can be shortened to the desired length. Both parts can be delivered with a length of 4m.

 

Product features:

  • Flexible sensor wire, which is adjustable to a length from 300 to 4000 mm
  • Split design, which makes the sensor easy to install and service. The electronics can be separated from the mechanical part by loosening the threaded union.
  • Alarm output can be set in a range from 10% to 100%.
  • The possibility for direct regulation of modulating valves, pilot valves, or step motor valves.
  • Compact design that minimises shipment costs.
  • Can be used for marine applications, since measurement is not affected by contact with the metal surface of the overflow pipe.

Configurable sensor
The sensor can be configured with a simple PC tool, where you can set up the refrigerant together with the length of the sensor. Based on your desired set point, it is also possible to use the PC tool to configure an alarm output, as well as to choose whether the analogue output signal should be linear in respect to the level measurement, or if it should be the controlling signal of a modulating valve.

Usable for common refrigerants
The sensor is designed to measure all common refrigerants, including NH3, HFC, and Brine, and it is a further development of the HBLT-A1, which is installed in over 30,000 systems. Both sensors are characterised by their design to withstand the extreme conditions of the refrigeration industry, with temperatures down to -50° C and corrosive environments from the use of NH3, for example.

One sensor for all applications
The sensor is unique in its design, since one product number covers all application requirements. The sensor can be installed in traditional stationary systems as well as in marine systems, where the rough waters lead to movement of the wire. Traditionally, a wire solution was not recommended for marine installations, but since the wire is coated in Teflon, there is no risk of the measurements being affected by contact with the wall of the tank or with the overflow pipe.  Similarly, it can also be used with both NH3 and HFC. The dielectric constant for the two media is different, and to compensate for this, they are installed in overflow pipes of different sizes.

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