Laser level transmitter offers high accuracy for harsh environments

With its IP67/NEMA 4X explosion proof class 1 / division 1 (zone 1) enclosure, it can be used in a range of applications, including mining, aggregates, oil and gas, chemicals, food and beverages, power, pulp and paper, pharmaceuticals and water and waste water.

Offering a resolution of 5mm, an accuracy of ±20mm and an eye-safe, Class 1 laser beam with a divergence of less than 0.35°, the LLT100 can be used in low visibility conditions. Its range spans from 0.5 to 30m for liquids, 0.5 to 100m for solids and 0.5 to 200m for positioning applications with a reflective target. 

A rotating bracket and a swivel flange option allows precision aiming of the beam, while a laser pointer tool is used to provide a visual reference when aligning the LLT100. Neither maintenance nor calibration is needed.

Featuring ABB’s common four-button HMI, it offers fast and flexible installation and an easy setup function, with the use of a Through-the-Glass (TTG) user interface eliminating the need to remove the transmitter cover.

The LLT100’s standard enclosure material is powder-coated aluminium, with 316L stainless steel as an option. This, together with with a choice of a range of flange fittings or Tri-Clover 3-A, makes the LLT100 suitable for food production applications or others where a high standard of hygiene is demanded. Outputs are both analog, using NAMUR compliant 4 to 20 mA, and digital HART 7. 

For non-ideal conditions, various accessories and options are also available. These include a dust tube to prevent dirt or splashing liquids getting on to the lens and the option of a heated lens to help prevent condensation forming that could affect performance.

A number of services are provided by ABB to help ensure the continued operation of the LLT100 throughout its life. These include product commissioning, maintenance and field services, repairs, spares parts services and training.

The LLT100 transmitter is part of ABB’s family of non-contact laser volume and level products offering accurate measurement in a range of applications including inventory in bunkers, blending hoppers, reactor vessels, level control, volumetric measurement, and various dry bulk solids and liquids in silos.