"A relatvely recent development is the temperature monitoring system, a requirement of many caterers, as part of HACCP procedures.  Temperature-monitoring systems can deliver significant benefits in terms of energy efficiency by ensuring equipment is performing correctly.  For example, a freezer or refrigerator working at too low a temperature may be keeping food safe, but is also wasting energy. A temperature-monitoring system will issue a warning.  Some monitoring systems can also detect if a piece of equipment is about to breakdown, so that you can call a service engineer before failure occurs. This not only saves downtime and costs , it also reduces stress in the kitchen and allows for preemptive sevicing before a full breakdown.  CESA now has an accreditation scheme to recognise the professionalism and service provided by leading compaines to ensure that your equipment is maintained effectively.  Look for the logo."