A level meter includes light emission segments forming an emission region, a register portion to register a default emission condition and an emission-condition specified value, and a control portion. The control portion controls the light emission so that the emission region spreads in an emission proceeding direction according to an increase in numerical quantity to be expressed. An emission-condition specified value indicates a command to apply a predetermined specified emission condition concerning a subsequent segment positioned on a more upstream side than a foremost segment positioned on a most downstream side in the emission proceeding direction. The control portion allows all the light emission segments forming the emission region to emit light based on the default emission condition, and the control portion allows the foremost segment to emit light based on the default emission condition whereas allowing the subsequent segment to emit light based on the specified emission condition.