One reading of a sensor at a given point in time. The date and time of the sensor reading. The value of the sensor reading. The default units are the units defined in the sensor. The user-defined accuracy of the sensor reading. The default units are the units defined in the sensor. The code identifing the method for determining the accuracy of the reading. Is this a reading of the primary reference (non-recording) sensor? Is this a reading from the primary (preferred input) recorder? The Code indicating a remark about the value of the measurement.