E.S.I. Environmental Sensors Inc.

E.S.I. Environmental Sensors Inc.

July 16, 2007 21:39 ET

ESI Announces Investor Relations Agreement with MarketSmart Communications

VICTORIA, BRITISH COLUMBIA--(Marketwire - July 16, 2007) - E.S.I. Environmental Sensors Inc. ("ESI") (TSX VENTURE:ESV) is pleased to announce that subject to Exchange Approval the Company has entered into an Investor Relations Agreement with MarketSmart Communications Inc. The Agreement is to provide investor relation services by introducing the Company to national and international brokerage houses, contacting financial and industry specific media, providing shareholder and investor communication services, assisting on public disclosure requirements, and acting as a liaison between our clients and market makers, brokers, agent and the shareholders of ESI. MarketSmart Communications is wholly owned by Maria Da Silva.

For providing the service pursuant to the terms of the Agreement, MarketSmart shall be paid $5000 per month plus GST and 125,000 stock options at an exercise price of $0.55. The term of the agreement is 6 months with an option for renewal, commencing on Exchange approval.

About ESI

ESI is a leading developer and manufacturer of patented and proprietary systems for industrial and environmental applications where understanding the presence and content of water is important. Major market sectors include: Agriculture, Golf and Turf, Scientific Research and Oil. ESI products have been successfully introduced into over 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 from producing oil wells for characterization and optimization. ESI differentiates itself by translating the best technology and science available into practical, easy to use solutions. Irrigation managers and scientists have adopted ESI's products for their accuracy, ease of use, repeatability, and ability to operate in challenging conditions. 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,

Blair Heffelfinger, President & CEO

E.S.I. Environmental Sensors Inc.

Material Copyright 2007, 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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