A bending apparatus for manufacturing a bent member from a steel pipe with high dimensional accuracy and high productivity can be installed in a small space with good maintainability. Also included are arrays comprising the sensors and methods of using the devices to detect volatile compounds. The system may also include at least one valve configured to provide the flow of fluid to the hydraulic dissipation circuit in response to one or more control signals and a controller configured to receive an input signal from an operator actuated device, and generate the one or more control signals based on the input signal. The housing includes an access portion that allows the encoder scale to be inserted into, andor removed from, the opening by a relative movement between the housing and the encoder scale in a direction other than the axial direction. A circuit adds the data to an omitted-coverage list. The solder resist is not in contact with the land, and an end portion of the wiring line is arranged such that, when a solder ball is not provided, the end portion of the wiring line and the land face each other with a distance therebetween.