E.S.I. Environmental Sensors Inc.

E.S.I. Environmental Sensors Inc.

April 14, 2009 09:00 ET

ESI Announces Real-Time Moisture and Temperature Monitoring via Web-Based Software With Next Generation GroPoint™ Wireless

VICTORIA, BRITISH COLUMBIA--(Marketwire - April 14, 2009) - ESI Environmental Sensors Inc. (TSX VENTURE:ESV) is pleased to announce the release of the Next Generation GroPoint™ Wireless. This new, cost effective, product edition features improved radios that accept four digital or analog readings, web enabled software and cell modem coverage for remote locations.

This GroPoint™ release means that farmers and irrigation managers can now monitor critical soil and weather conditions from one extremely straightforward software interface. This makes it dramatically more efficient to monitor large crop areas in order to minimize damage due to weather and irrigation issues, while maximizing crop quality and yield.

GroPoint™ Wireless was designed and developed over the course of the last year in close consultation with ESI's customers and distribution partners. GroPoint™ Wireless provides real time moisture and temperature information, enabling precision irrigation and frost protection. In addition, the system is designed to send alerts via email to users in the event that temperature or moisture has breached user-defined alarm levels. System design flexibility means customers can add other sensors, such as: pressure, flow, rain gauge, wind speed/direction, etc., as required. Use of Smart Phones with GroPoint™ Wireless means a user is always informed of critical conditions regardless of location.

ESI's 900 MHz radios offer up to 5 km (3 mile) line of sight transmission with an optional cell modem add on that provides the information over the internet anywhere there is a connection. The next generation GroPoint™ Wireless Software incorporates Microsoft® Virtual Earth mapping and an intuitive user interface that is fast, easy to use, and offers multiple views including: Graph view and List view.

"We are extremely pleased to offer this unrivalled, end to end system to our distributors, resellers and customers," commented David Porter, ESI's Vice President of Sales and Marketing. "The system's foundation is ESI's GroPoint™ sensors - known around the world for their accuracy, and quality - and ends with a world class, easy to use proprietary software application. ESI has hit the mark with GroPoint™ Wireless and we are working hard to meet the demand for this product."

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, Director

E.S.I. Environmental Sensors Inc.

Material Copyright 2009, 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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