Articles & Case Studies

Smart opthalmics

Posted: Friday 9th June 2017

ESSILOR, the giant of ophthalmic lenses, sets up a water-saving programme. The industrial group has chosen Diehl Metering for a worldwide deployment of smart solutions, meters and system.

Making 500 million lenses per year requires numerus stages of manufacturing to achieve a very high level of quality. Each step of the process requires the use of high quality of water in significant quantities. As part of the continual improvement of its environmental management approach, for several years, ESSILOR has been conducting an innovative water-management programme. The group decided to take a structured "Eco-design" approach that has become a standard in five key stages: measuring, reducing, reusing, recycling and processing.

Identification of strategic metering points "Water Mapping": a pilot project in a French facility resulted in a precise mapping out of the different ways of using water, whereby the site modelled the consumption for each type of use (pre-treatment, process, sanitary...).

"ESSILOR needs of a highly reliable supplier, able to support our project of water reduction, in a worldwide industrial environment. Qualification of needs and tests of Diehl Metering's solution on the pilot site convinced us of the reliability and robustness of their radio solution. Moreover, metering technologies can manage multi-fluids and energy consumptions with the same infrastructure. Diehl Metering also offers a performing data management software, a genuine tool for supporting decision-making. " Philippe Cuny, EHS WW Operations Director, ESSILOR

Diehl Metering Solution

Diehl Metering intervened by offering a water metering solution based on a complete fixed network 100% radio that ensures simple installation and setup in all countries: frequency is flexible according to account legal constraints, 868 MHz for Europe or 434 MHz for South America for ex.

Different metering technologies are combined according to the plants: volumetric, single-jet or ultrasonic. IZAR RC i 868 R4 radio associated to the receiver RDC and to the data management software IZAR@NET complete the network. To analyse other fluids and process, Diehl Metering offers a temperature sensor IZAR RE Air and IZAR BE Pulse radio for electricity metering. Diehl Metering provided support and formed ESSILOR team to carry out the installation at the first site. Then ESSILOR can improve its Water Model to the other plants.

The data management software IZAR@NET sends information hour-by-hour according to the configuration of ESSILOR. Water consumption monitoring reveals variations in comparison with a standard consumption rate per lens produced. A performing fixed-network that allows a precise measurement and a fine analyse of consumptions: individual metering, for each process, etc. The Water Model obtained instantly adjusts the action plan (Eco-driving).

Thanks to this solution, the test site has reduced its water consumption per lens produced by 50% in just one year. The group has taken the decision of large-scale deployment and, with Diehl Metering technical support, the staff of ESSILOR will be able to complete the next installation projects autonomously around the world (Thailand, Mexico, China, United States, Ireland, Swiss, Italy and Philippines).

"Diehl Metering solutions supplies key indicators on each type of consumptions. Data analysing generates processes improvements allowing an economy of 50% of water consumptions in one year. For example, water leaks or process deviations are clearly identified, and then we can decide to set up corrective actions faster and durably. ESSILOR has now a unique model for all of the plants, that is allows a global view of the good practices used. Diehl Metering solution contributes significantly to our program of economy performance. " Philippe Cuny, EHS WW Operations Director, ESSILOR

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