Patent ID: 8275918

Claim:
An environmental condition monitor comprising: an analog processing element for sensing an environmental condition and providing an analog output signal responsive to the environmental condition: a digital output element; a connector element receiving the analog output signal via a first signal conductor, wherein the digital output element and a second signal conductor are disposed on the connector element; a first digital communication element adapted for removable physical connection to the second signal conductor of the connector element, the first digital communication element comprising an analog-to-digital processing element receiving the analog output signal and producing a first digital output signal responsive to the analog output signal according to a first digital communication protocol, the first digital communication element providing the first digital output signal to the digital output element via the second signal conductor; and further comprising a second digital communication element adapted for removable physical connection to the second signal conductor of the connector element in place of the first digital communication element wherein only one of the first and second digital communication elements is connected to the second signal conductor at any time, the second digital communication element comprising an analog-to-digital processing element receiving the analog output signal and producing a second digital output signal responsive to the analog output signal according to a second digital communication protocol, the second digital communication element providing the second digital output signal to the digital output element via the second signal conductor.