Measurement device

A measurement device for use with an object to be measured, the measurement device comprising:

• a probe;
• a display:
• a display control part configured to display, on the display, a measurement result obtained by the probe that measures at least either one of a pH, an oxidation-reduction potential, an ionic concentration and electric conductivity by making contact with the object to measured, wherein
• the display control part displays displaying screens in a switchable manner, the displaying screens comprising:
• a numerical value displaying screen that displays the measurement result as a numerical value,
• an analog displaying screen that displays a series of a scale on a predetermined position of which a value is assigned and an indication device that indicates a position corresponding to the measurement result on the scale, and
• a graph displaying screen that displays the measurement result as a time series graph on a coordinate system where one axis indicates a time and the other axis indicates the measurement result,
• the display is a touch panel type display,
• the display control part is configured to switch each of the displaying screens continuously in conjunction with a touch slide operation on the display by moving a first displaying screen of the two displaying screens to the outside of a displaying area on the display and by moving a second displaying screen of the displaying screens to the inside of the displaying area in a manner such that the first displaying screen and the second displaying screen do not overlap, and
• the display control part is configured to display, in the middle of the switching displaying screens and in the displaying area at the same time:
• the numerical value as the measurement result of the numerical value displaying screen and the series of the scale of the analog displaying screen;
• or
• the numerical value as the measurement result of the numerical value displaying screen and the time series graph of the graph displaying screen.