+// Structure to define the warning and error thresholds of the sensors
+typedef struct
+{
+ double max_error;
+ double min_error;
+ double max_warn;
+ double min_warn;
+} SensorThreshold;
+
+extern void Sensor_Init(); // One off initialisation of *all* sensors
+
+extern void Sensor_StartAll(const char * experiment_name); // Start all Sensors recording data
+extern void Sensor_StopAll(); // Stop all Sensors recording data
+extern void Sensor_Start(Sensor * s, const char * experiment_name); // Start a sensor recording datas
+extern void Sensor_Stop(Sensor * s); // Stop a Sensor from recording data
+extern void Sensor_Pause(Sensor *s);
+extern void Sensor_Resume(Sensor *s);
+extern void Sensor_PauseAll();
+extern void Sensor_ResumeAll();
+
+extern void * Sensor_Loop(void * args); // Main loop for a thread that handles a Sensor
+extern bool Sensor_Read(Sensor * s, DataPoint * d); // Read a single DataPoint, indicating if it has changed since the last one
+extern void Sensor_CheckData(SensorId id, double value); // Check a DataPoint
+extern Sensor * Sensor_Identify(const char * str); // Identify a Sensor from a string Id
+
+extern void Sensor_Handler(FCGIContext *context, char * params); // Handle a FCGI request for Sensor data