Sensor to read out data on gas and water meters (typically gas) and to be used with the Smappee Gas & Water. This optical sensor is fit for meters with a mirror in the numbers 6, 8, 9 or 0 or for meters with a little rotating wheel. This item includes a sensor, a cable (1 meter) to connect it to the Smappee monitor and 3 mounting strips for exact and easy installation on the meter.