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Technical data: HBLT-W3-Wire & HBSLT-W3-Wire

HBLT-W3-Wire and HBSLT-W3-Wire are the latest version of capacitive wire sensors for liquid level measurement. The sensor is typically used in industrial refrigeration systems and other industrial applications. They are useable in ammonia, HFC/HFO/CFC, and water but not in oil, hydrocarbons, and CO2. For these liquids with a low dielectric constant the HBLT-FLEX must be used.

The sensor has no dead zone and can be used for lengths from 250 mm to 4 or 6 m. It must be installed in a standpipe or in a pipe built into a vessel with a diameter from DN 25 to DN100 (1” to 4 “).

Both sensors have a 4-20 mA analog output signal, which is proportional to the liquid level. Its output signal is 4 mA for an empty container and 20 mA for a full container.

The HBSLT has a built-in controller and a cable output supplementing the M12 output. This cable is used for direct valve control. Alternatively, HBLT-W-Wire can be used in connection with the HBLT-C1 controller or a PLC for controlling pumps and valves.

The sensor element consists of a 1.5mm insulated stainless steel wire. The wire is provided in 4 or 6 m length and can be shortened on site with diagonal cutters or other pliers. When cut to length the sensor must be setup to the actual length by using the HB tool.

This latest version has a new counterweight where the wire pass through without electrical connection. This construction ensures a linear measurement all the way from the end of the wire below the counterweight to the top.

If the sensor must be used in water or other liquid conducting fluids and high accuracy is needed a special kit is needed. The function of the kit is to close the open end of the wire to eliminate the electrical contact.

Product features

• Flexible sensor wire, which is adjustable to a length of 250 to 6000 mm.
• Sturdy and reliable design with a standard 4-20 mA output signal.
• Designed for the refrigeration industry – max. pressure up to 100 bar.
• Split design which makes the sensor easy to install and service. The electronic part can easily be separated from the mechanical part by loosening the threaded union.
• Simple calibration for the specified length.
• Alarm output can be set in a range from 10% to 100%.
• 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.
• Measures NH3 & HFC/HFO refrigerants.

Application

When using a level sensor for measuring Ammonia in a compact plate and shell heat exchanger or other systems with turbulent conditions, we have new recommendation based on recent experience:

For Stand-pipes with stable conditions (smooth changes in the level):

• Use a HBLT-Wire or a HBLT-A3 probe sensor.

For Stand-pipes with turbulent conditions (a lot of turbulence, boiling, foaming, and receiving liquid from the top):

• Use a HBLT-A3 sensor, or

• Use only a HBLT-Wire sensor when you have it mounted in an inner guide-tube of e.g. DN25 as illustrated. The guide-tube will reduce the turbulence and the foaming so you will have a good measurement.

• If the HBLT-Wire sensor is already mounted under these conditions WITHOUT a guide-tube,you can set the filter time between 60-120 seconds to dampen the signal from the turbulent conditions. For Alfa Laval U-turn evaporator: Use a HBLT-A3 sensor.

Specification

Ordering Code

*Stepper motor, PWM & IP versions are without display.

**HBLT-W3-WIRE-IP is a low temperature version.

Download

• Instruction manual - HBLT-Wire
• Drawing - STEP file - HBLT-Wire

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