This chapter focuses on the benefits of integrating environmental sensor products with Enterprise Security Management (ESM). Environmental sensors are intended to alert and respond to physical threats to IT systems and prevent disasters such as water leakage, temperature increases, and emmisions of dangerous gases from causing a massive outage. According to the Wall Street Journal”, Downtime costs the average Fortune 500 company. $50,000/minute”. Server rooms overheating or wiring closets filling up with water can and will cause outages and downtime for businesses. Because the ultimate goal of any IT professional is to ensure that critical systems are available, it doesn't matter whether the threat is caused by a hacker or the environment. With an early warning system and strategic policies in place you can achieve and maintain operational efficiencies.