The invention discloses a meter and a photoelectric sampling device and a photoelectric sampling method of the meter, which belong to the technical field of flow measurement, and solve the problem oflight interference caused by the fact that an existing meter adopts reflection type optical
signal sampling. The photoelectric sampling device of the meter comprises a
light emitter, a light receiverand a rotary disc, wherein the light
receiver and the
light emitter are oppositely arranged, and a light correlation region is formed between the light
receiver and the
light emitter; and the rotary disc is driven by means of a base meter of the meter to rotate, a shading part and a light-transmitting part are arranged on the rotary disc, and the shading part and the light-transmitting part alternately pass through the light correlation region through the rotating motion of the rotary disc. According to the photoelectric sampling device and the photoelectric sampling method, correlation optical
signal sampling is carried out, the problem that light is easily interfered by external light in reflection-type optical
signal sampling is solved, the identification difficulty of sampled signals is reduced, and the manufacturing process requirement and the
assembly requirement of product parts are reduced.