<p>The invention relates to a condition monitoring device for attachment to a machine and for monitoring the condition thereof. It comprises at least one sensor for monitoring at least one parameter of the machine; a processor connected to the at least one sensor for analysing the signals produced therefrom; a wireless transmitter and a wireless receiver connected to the processor and allowing external communication therewith; and a battery connected to the processor. Additionally, the device further comprises at least one visual indicator of the status of the monitored machine based upon the sensed parameter. The invention extends to a system for putting the device into effect</p>
