To operate any process efficiently, it is essential to measure, actuate, record and control. ABB measurement products have provided world-class measurement solutions for industry, utilities and municipalities for more than a century and the latest innovations deliver solutions that make it ever easier for users to run their plants. ABB measurement products are based on common technology, providing a common look and feel and method of operation, which results in products that are easy to configure, integrate and maintain.
The ABB family of non-contact laser level transmitters provides easy solutions for accurate and reliable level measurement. Laser level measurement revolutionises the level measurement industry as it is designed for all industrial applications and replaces open-path radar and other level transmitters. It changes the way level measurement is performed. It is level measurement made easy.
Level measurement with laser technology
Using a time-of-flight calculation, the LLT100, LM80, and LM200 can accurately measure the distance to the target surface. These level transmitters use invisible, eye-safe, infrared laser pulses to measure the distance to the surface. The onboard microprocessor calculates the distance by multiplying the known speed of light by the laser pulse travel time from the transmitter to the surface and back. The laser beams have very little divergence (<0,3°) so that accurate targeting is easy, even in silos or vessels that have internal structures. Moreover, the narrow beam doesn’t interact with local structures or build-up on vessel walls, making the measurement reliable even when the
environment changes. This means no reconfiguration, no down-time and reduced lifetime costs. Other benefits include:
• Maintenance free.
• Narrow beam not affected by surrounding structures.
• No echo mapping required.
• Flexible installation can be aimed at an angle.
• Range up to 200 m.
• Accurate fast response.
The LM80 is a non-contact, laser level measurement transmitter designed for any solid materials and opaque liquids. Based on pulsed laser
technology, the LM80 embodies speed and accuracy in a single, easy to use and install product. The characteristic narrow beam divergence of the laser permits direct aiming to the target surface without interference from structure or falling material. With both continuous 4-20 mA and single point relay outputs, the LM80 can operate as a process control sensor while simultaneously providing high and low alarms.
Whether measuring a few metres into the confined space of a crusher, or to the bottom of the tallest silo, the LM80 with its laser pointer is the plug-and-play solution to level measurement.
The LM200 is dedicated to long range applications. It measures solids at distances up to 200 m and up to 45 m on opaque liquids. It finds many applications such as ore pass level monitoring in mining, for instance. The LM200 is also ideal for long distance positioning applications up to 400 metres, with the use of a reflector on the targeted object. For instance, this can be used for tripper car positioning, providing a maintenance-free solution as the sensor will not wear because it is never in contact with the moving car.
The LLT100 is the latest generation of laser level measurement transmitters. Building upon the success of the LM80, it incorporates a multitude of innovative technologies in order to tailor laser time-off-light measurement to the demands of industrial applications. The LLT100 is therefore capable of measuring any solids or liquids, even transparent liquids, by using precise timing circuits, laser pulse control, and powerful signal processing. The level of solids can be measured at up to 100 m and liquids at up to 30 m – all of this available in a 2-wire powered device.
Optimise process or inventory management:
• Precise measurement of any solid or liquid.
• Independent of material properties.
Low cost of ownership:
• Fast and flexible installation.
• No reconfiguration when the environment changes.
• Single product configuration works for many applications.
• Easy setup menu.
• Embedded graphical user interface.
• 2-wire powered and HART 7 communication.
• Dust and fog penetration capabilities.
• Accurate measurement at distances up to 100 m.
• Approved for use in hazardous area class 1, division 1 (zone 1).
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