These alarms can be at the rack, or by email, or by SNMP  traps, or by all three methods depending on the system. There are  several different types of sensor systems from several different  manufacturers, available at present. One of them is a compact  environmental monitor with one onboard temperature sensor and in  addition the ability to support up to 16 remote sensors. The system is  very small so you don´t have to change your system. If you receive a  problem alert, you are able to identify the rack and power strip having  the trouble, and turn off the individual outlet or reboot it.

Another  power management and control system available is able to track  temperature, humidity, airflow, and water at various locations from 15  to 100 feet away. This system needs only limited rack space and can  control individual power receptacles. Another system on the market  utilizes two sensor probes in each rack, one in front, one in back, to  better measure the environment in the rack. This gives you a  thermographic view of the temperature range in the rack and can be  displayed in color for all the different racks in the computer center.  This information can be used to determine the size and location of any  additional A.C. or fans or blowers needed to correct a cooling system.  It can also assist in the rearrangement, if necessary, of the rack  layout and separation of a cold aisle/hot aisle system or any rack  system, or when additional racks are added to a functioning system.

The  control of heat generation and temperature in the data center continues  to be one of the most critical areas. The monitoring of the environment  has gone from the room, to the zone, to inside the individual server rack to give a much more precise picture of what is happening and allow better response to emergency conditions.

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