What is the difference between the AKCP sensorProbe and securityProbe ranges?
In very simple terms, the securityProbe range is more feature rich than the sensorProbe range. The sensorProbe range offers a more honed feature set and lacks some of the more advanced alerting options available on the securityProbe range like SMS text alerting. The securityProbe range also supports a wider range of sensors. Though the additional sensors supported do tend to be quite niche, like fuel tank level measurement and the like.
With the release of the sensorProbe2+ and sensorProbeX+ this line has been somewhat blured because both optionally offer built-in SMS text alerting.