Lasermeters to effectively measure level and position
August 2006
Level Measurement & Control
Laser Measurement, a supplier of level and positioning transmitters worldwide, supplies LM150S and LM80 lasermeters for level and positioning applications used in process control. The company's product range is applicable to a variety of industries such as food and beverage, petrochemical, and mining.
The LM150S model can be used for volumetric scanning of solids within a silo or bunker. Features include up to 16 virtual lasers with multiplexed 4-20 mA output, up to four virtual lasers with their own dedicated 4-20 mA output and direct aiming up to 100 points on multiplexed analog output. It is specified to have a diagonal measuring range of 0,5 to 35 m, a resolution of 1%, a distance measuring accuracy of 25 m, a volumetric accuracy of typically 1% and an update rate of 2 to 3 minutes per scan on static surfaces.
The LM80 lasermeter is a rugged unit with a strong cast aluminium housing and comes with lightning and surge protection on both the 24 V d.c. power supply and signal lines. Two mechanical relays with an output AC rating of 1 A at 120 V a.c. and 0,5 A at 220 V a.c., or an output DC rating of 1 A at 60 V d.c. is incorporated. The unit is available in a 0,5 to 25 m level unit for short range applications such as crusher and bin levels, and a 0,5 to 150 m positioning unit for applications such as tripper cars, over head cranes and stacker-reclaimers. This model is available as a standard environment laser transmitter or with special adaptation for hygiene conditions as well as a hot glass unit, which solves the problem of condensation on the lenses. A visible pointer for easy alignment is available as an optional extra.
This product is specified to measure a distance up to 150 m at a resolution of 10 mm and an accuracy of ±25 mm. Readings update at a rate of three readings per second for distances up to 80 m, and 1,5 readings per second up to one reading per 60 seconds for distances between 80 and 150 m.
The LM80 incorporates newly developed software that maximises the dust penetration capabilities by automatically adjusting the power level of the laser to allow it to penetrate dust more effectively. Setup of this unit is made easier with simplified user menus and menu options and can also be done with the laser communication device. This device requires no batteries as it draws power from the unit and can be used for mA setup and program selection with a display screen for convenience.
Further reading:
A fresh approach to dairy processing
VEGA Controls SA
Level Measurement & Control
Ensuring the quality and safety of milk throughout the production process is of the utmost importance in the dairy industry. The VEGABAR pressure transmitters are suitable for hygienic applications. They are an asset in the dairy industry and have been used with success for measuring the milk level and the process pressure in storage tanks.
Read more...
A new era in radiometric level and density measurement
Mecosa
Level Measurement & Control
The LoopSeries LB 430 radiometric detector from Berthold Technologies has a revolutionary power solution and sets new standards in level and density measurement.
Read more...
Level measurement of an acid dosing tank at a WWTP
Level Measurement & Control
Ferric chloride and other acids are essential chemical substances in water and wastewater treatment. To control the dosing of acid solutions, an Australian wastewater treatment plant uses a special container to store, mix and add these chemicals. The company opted in favour of KROHNE’s OPTIWAVE 1540 radar level transmitter
Read more...
Level measurement of leachate from sewage sludge humification
Level Measurement & Control
A municipal utility in eastern Germany operates a state-of-the-art wastewater treatment plant with sustainable sludge treatment. The ultrasonic signal was being partially deflected by the wind, leading to frequent false measurements and inefficient process workflows. The problem was solved by replaced the ultrasonic level sensor with KROHNE’s OPTIWAVE 1540 non-contact radar.
Read more...
Groundbreaking measurement system
Mecosa
Level Measurement & Control
Berthold Technologies has launched the LoopSeries LB 430, an innovative, industry-leading measurement system designed to enhance operational efficiency with advanced level, density, and level switch capabilities.
Read more...
Level measurement of a water sump at a sewage treatment plant
Level Measurement & Control
A major city council in South East Queensland, Australia maintains and operates a wastewater treatment plant (WWTP) for municipal, industrial and agricultural wastewater. Due to the risk of flooding, the water sump must be continuously monitored. The solution is KROHNE’s OPTIWAVE 1540 radar level transmitter.
Read more...
Simplicity in measurement
Endress+Hauser South Africa
Level Measurement & Control
Endress+Hauser’s new 80 GHz compact radar range is designed to help customers reach their compliance targets through simple yet efficient measurement solutions.
Read more...
Case History 196: Unstable condensate level control.
Michael Brown Control Engineering
Editor's Choice Level Measurement & Control
The operators in a petrochemical refinery were having great trouble in trying to stabilise the condensate level in a vessel, and this was adversely affecting other loops downstream. Several unsuccessful attempts had been made to retune the controller.
Read more...
Non-contact level measurement for hygienic and industrial applications
ifm - South Africa
Level Measurement & Control
The LW2720 radar level sensor from ifm sets new benchmarks for speed and accuracy.
Read more...
Level measurement in oil storage
VEGA Controls SA
Level Measurement & Control
Measuring the level of crude oil in storage is essential for safe and efficient operations. VEGA offers solutions that effectively address the challenges, ensuring precise and consistent level measurements in crude oil storage facilities. VEGA’s sensors offer reliable data on the volume, level and pressure of all types of media. Accurate level measurement is complicated by crude oil thermal expansion properties, particularly in lighter oil grades.
Read more...
printer friendly version