Apparatus and associated methods

A method involving the use of an apparatus,

• the apparatus comprising a sensor array, configured to produce an array output value in response to an environmental stimulus, and a controller,
• the sensor array comprising a plurality of sensors and a common output terminal connected to the respective outputs of the sensors, each sensor having first and second electrodes configured to output a respective sensor output value in a particular environment based on the areas of the first and second electrodes and/or the spacing therebetween,
• the controller configured to control which of the sensors are connected to the common output terminal using respective switches to vary the effective area and/or spacing of the sensor array such that the array output value at the common output terminal, based on the contribution of the respective sensor output values of the connected sensors, is held at a reference value,
• wherein the method comprises controlling, by the controller, which of the sensors are connected to the common output terminal using the respective switches to vary the effective area and/or spacing of the sensor array such that the array output value at the common output terminal, based on the contribution of the respective sensor output values of the connected sensors, is held at a reference value.

A computer program comprising computer code configured to control the use of an apparatus,

• the apparatus comprising a sensor array, configured to produce an array output value in response to an environmental stimulus, and a controller,
• the sensor array comprising a plurality of sensors and a common output terminal connected to the respective outputs of the sensors, each sensor having first and second electrodes configured to output a respective sensor output value in a particular environment based on the areas of the first and second electrodes and/or the spacing therebetween,
• the controller configured to control which of the sensors are connected to the common output terminal using respective switches to vary the effective area and/or spacing of the sensor array such that the array output value at the common output terminal, based on the contribution of the respective sensor output values of the connected sensors, is held at a reference value,
• wherein the computer code is configured to control, with the controller, which of the sensors are connected to the common output terminal using the respective switches to vary the effective area and/or spacing of the sensor array such that the array output value at the common output terminal, based on the contribution of the respective sensor output values of the connected sensors, is held at a reference value.