ESI Corporate Update

Victoria, British Columbia, Novermbr 30, 2011 – E.S.I. Environmental Sensors Inc. ("ESI" or the "Company"), TSX-V: ESV is pleased to announce the appointment of Matteo Beffa to the Board of Directors for the Company. The Company continues to execute its new strategy with regard to board and executive management restructuring. Appointed as a Director at the Company’s Annual and Special Meeting, Mr. Beffa adds his irrigation industry experience and expertise to the Board.

Educated and trained as an agricultural engineer, Mr. Beffa brings extensive expertise and experience in agricultural/ recreational irrigation to the Board of ESI. Mr. Beffa spent five years at Toro’s Swiss subsidiary, where he restructured the irrigation department (distribution, marketing, technical) and handled key accounts in the Swiss Golf-Turf market. As part of an independent assignment, Mr. Beffa played a vital role in developing one of the first rainwater drip irrigation systems. In 2005, Mr. Beffa founded his own company, ‘MultiOne Suisse’, where he now focuses on import and distribution of landscaping, agriculture, and irrigation equipment for green areas. Mr. Beffa has considerable ties to the European irrigation industry and is committed to supporting ESI in becoming a market leader. Mr. Beffa has obtained a Diploma in Agriculture and has supplemented his diploma with advanced education in Agro-Economics and Business Management in Zurich, Switzerland. In addition, Mr. Beffa is fluent in German, English, Italian and French.

Mr. Beffa will take the Board seat of Ingvard Find who has decided to step down from the Board and to not renew his Board assignment for another term.

About ESI

ESI is a leading manufacturer of patented and proprietary solutions for environments where understanding the presence, movement, and/or amount of water are important. Major market sectors include: agriculture, golf and turf, scientific research, civil engineering, mining, environmental monitoring and crude oil production. ESI solutions have been successfully introduced into more than 40 countries to enable customers to optimize their operations by monitoring the presence and movement of water, managing irrigation systems, and monitoring the integrity of landfill covers. Most recently, the Flo•Point™ instrument has been introduced to the oil industry to measure the volumetric presence of water pumped during crude oil extraction for characterization and optimization of the process. ESI differentiates itself by translating the best technology and science available into practical, easy to use solutions. Irrigation managers, reservoir engineers, and scientists have adopted ESI's products for their accuracy, ease of use, repeatability, and ability to operate in challenging environments. ESI is publicly traded on the TSX Venture Exchange under the symbol "ESV". Further information about ESI may be obtained through the Company's website at www.esica.com.

ESI ENVIRONMENTAL SENSORS INC.
2071C Malaview Avenue West
Sidney, BC V8L 5X6
Tel: 250.655.3211 or 1-800.799.6324
Email: investor.relations@esica.com

MEDIA AND INVESTOR RELATIONS CONTACT:
Bernard M. Beauchesne
Email: bbeauchesne@esica.com
Tel: 250.655.3211 or 1-800.799.6324
www.esica.com

THE TSX VENTURE EXCHANGE HAS NOT REVIEWED AND DOES NOT ACCEPT RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE.

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