The new level sensor HBLC-R-IP designed for installation in freeze tunnels and other low temperature applications with ambient temperatures as low as -50°C has been launched by HB Products at Chillventa trade show, which is currently underway. The company has also presented a new level controller HBLT-C1 for pump separators, receivers and economisers.
HBLC-R-IP is an intelligent microprocessor-based sensor for detecting refrigerant levels at ambient temperatures as low as -50°C. The temperature compensation prevents ice formation on the sensor and ensures that the electronics maintain a stable operational temperature. It is well suited as a safety indicator for an empty liquid line, for example inside flow freezers before hot gas defrost.
The LED screen indicates the liquid level and renders sight glass redundant. Furthermore, it can also be used for level indication of high and low refrigerant levels, on/off control of liquid injection in liquid separators, pump separators, economisers, etc.
Key features of the sensor
The sensor is pre-calibrated for ammonia, but it can also be used for other kinds of refrigerant. The calibration function on the front therefore makes the HBLC-R-IP into a universal level switch for low temperature applications.
The sensor is supplied with a 24 V DC and the potential-free contact function can be set to either NO or NC. It is manufactured with chemical and temperature resistant materials and encased in accordance with IP68. The sensor is supplied with a special low temperature supply cable. The switch is mechanically designed to withstand operational pressures all the way up to 100 bar, and is supplied with ¾” thread.
Similar to other sensors from HB Products, HBLC-R-IP is designed with the unique split design that allows an easy separation of the electronic part from the mechanical. This feature makes it possible to perform diagnoses without disassembling the mechanical part from refrigeration system.
Specifications matching the requirements of the refrigeration industry
HBLC-R-IP is designed with the following mechanical and electronic specifications:
HBLT-C1 level controller with universal connection options
The new level controller HBLT-C1 is designed to connect to analogue 4-20mA level transmitters such as HBLT-A1 and HBLC-C02, but it is also suitable for other types of analogue sensors, such as RTK, Parker, Danfoss etc.
The controller is universal with regards to its connection options, since it can control one or more pumps using relays, or it can control magnetic valves such as Danfoss's AKVA series, via a solid state output. Similarly, it can control modulating motor valves such as the Siemens MVS 661.
Simple set-up and intelligent calibration function
Set-up is carried out from the front of the panel, and the menu structure allows to define alarm limits, set-point, and control parameters as well as the set-point and p-band, and the hysteresis and ramp-up during set-up of the control parameters. It is therefore possible to adapt the control function to the current system and its operational parameters.
Moreover, the intelligent calibration function makes it possible to calibrate the level transmitter irrespective of the refrigerant content in the vessel.
HBLT-C1 level controller specifications
The general specifications for the controller are:
About HB Products
HB Products is a development-oriented company based in Denmark, which has been specialising for over 20 years in the development and production of sensors for industrial refrigeration systems.
Contact Information
If you would like to contact HB Products for any enquiries, you may send a request to Mark Kristensen directly.
The LED screen indicates the liquid level and renders sight glass redundant. Furthermore, it can also be used for level indication of high and low refrigerant levels, on/off control of liquid injection in liquid separators, pump separators, economisers, etc.
Key features of the sensor
The sensor is pre-calibrated for ammonia, but it can also be used for other kinds of refrigerant. The calibration function on the front therefore makes the HBLC-R-IP into a universal level switch for low temperature applications.
The sensor is supplied with a 24 V DC and the potential-free contact function can be set to either NO or NC. It is manufactured with chemical and temperature resistant materials and encased in accordance with IP68. The sensor is supplied with a special low temperature supply cable. The switch is mechanically designed to withstand operational pressures all the way up to 100 bar, and is supplied with ¾” thread.
Similar to other sensors from HB Products, HBLC-R-IP is designed with the unique split design that allows an easy separation of the electronic part from the mechanical. This feature makes it possible to perform diagnoses without disassembling the mechanical part from refrigeration system.
Specifications matching the requirements of the refrigeration industry
HBLC-R-IP is designed with the following mechanical and electronic specifications:
- Supply: 24 V DC ±10%
- Current draw: Max. 10 W
- Plug: M12
- Output: Solid state / potential free NO/NC
- Ambient temperature: -50…+50°C
- Refrigerant temperature: -50…+100°C
- Max. operational pressure: 100 bar
- Waterproof rating: IP68
- Thread connection: ¾” NPT & ¾” BSP
- Materials – mechanical parts: AISI304/PTFE
- Materials – electronic parts: PA46-GF30 / Polycarbonate
HBLT-C1 level controller with universal connection options
The new level controller HBLT-C1 is designed to connect to analogue 4-20mA level transmitters such as HBLT-A1 and HBLC-C02, but it is also suitable for other types of analogue sensors, such as RTK, Parker, Danfoss etc.
The controller is universal with regards to its connection options, since it can control one or more pumps using relays, or it can control magnetic valves such as Danfoss's AKVA series, via a solid state output. Similarly, it can control modulating motor valves such as the Siemens MVS 661.
Simple set-up and intelligent calibration function
Set-up is carried out from the front of the panel, and the menu structure allows to define alarm limits, set-point, and control parameters as well as the set-point and p-band, and the hysteresis and ramp-up during set-up of the control parameters. It is therefore possible to adapt the control function to the current system and its operational parameters.
Moreover, the intelligent calibration function makes it possible to calibrate the level transmitter irrespective of the refrigerant content in the vessel.
HBLT-C1 level controller specifications
The general specifications for the controller are:
- Front size: 96x96 mm
- Waterproof rating: IP54
- Universal 24AC/DC supply
- 3 relays, NC/NO, max 5 A
- 1 solid state relay, max 1 A
- 1 valve output (3-threaded) with +24VDC, GND, and mA, max 1 A.
- 1 level input (4-20mA). From analogue sensor HBLT-A1 or HBLC-C02, etc.
- 1 external alarm input signal, possibly from high level switch.
About HB Products
HB Products is a development-oriented company based in Denmark, which has been specialising for over 20 years in the development and production of sensors for industrial refrigeration systems.
Contact Information
If you would like to contact HB Products for any enquiries, you may send a request to Mark Kristensen directly.
MORE INFORMATION
Oct 10, 2012, 17:02
Related stories
PARTNERS
Sign up to our Newsletter
Fill in the details below
