E.S.I. Environmental Sensors Inc.
TSX VENTURE : ESV

E.S.I. Environmental Sensors Inc.

March 28, 2008 09:30 ET

ESI Announces Additional GroPoint™ Wireless Sale to Cranberry Industry

VICTORIA, BRITISH COLUMBIA--(Marketwire - March 28, 2008) - E.S.I. Environmental Sensors Inc. ("ESI", the "Company") (TSX VENTURE:ESV) is pleased to announce the second major GroPoint Wireless sale to cranberry growers in New Brunswick this year. The updated and integrated system is designed to provide wireless delivery of accurate soil moisture and temperature information to the user's desktop.

ESI, has for some time, been marketing and selling a reliable GroPoint Monitoring system in the cranberry industry. However, through consultation with important stakeholders in the industry, ESI has now perfected a wireless temperature and irrigation monitoring and control system that allows growers to have confidence their cranberry bogs will use water efficiently and at the same time be protected from frost and heat damage.

ESI's first customer for GroPoint Wireless, Atocas Cranberry in New Brunswick, purchased a system earlier this year. Word spread to a neighbouring farm, and this neighbour has now purchased an enhanced system that will offer not only temperature and moisture information, but additionally provide irrigation line pressure information which serves as a feedback mechanism to the grower that the irrigation system has been activated as needed. Moreover, this system will be completed with long range internet delivery, allowing the customer to access information about his crop from anywhere in the world that has an internet connection.

"We are pleased to have this additional order from a neighbouring cranberry grower. We are selling a good night's sleep interrupted only when the system needs to alert the grower of potentially damaging conditions; the automated system will further confirm that the protection system has been initiated," commented David Porter, ESI's Vice President of Sales and Marketing. "It confirms the original customer's positive experience with ESI as a Company and GroPoint™ Wireless as a water monitoring and frost/heat protection system. Significantly, the cranberry industry in North America has 40-thousand acres in active production and we have high expectations for this important market this year."

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 and Crude Oil. 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 FloPoint™ 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.esisensors.com.

On behalf of the board,

Ian Middleton

E.S.I. Environmental Sensors Inc.

Material Copyright 2008, E.S.I. Environmental Sensors Inc. Reproduction in whole or in part in any form or medium without express written permission of E.S.I. Environmental Sensors Inc. is prohibited.

The TSX Venture Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release.

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