PURPOSE: To provide a high amplification measuring equipment for measuring the intensity of specific received pulse light while tuning and amplifying and employed in means for detecting position, traveling direction or traveling speed of a specific pulse light source.

CONSTITUTION: The high amplification measuring equipment of the intensity of specific received pulse light comprises a photoelectric converting element 1 which produces current upon receiving light, a tuning amplifier 2 for tuning/amplifying an output from the photoelectric converting element 1 produced upon receiving a pulse light of specific period, a comparator 3 for comparing an amplified output from the tuning amplifier 2 with a preset decision reference value and producing an ON output when the output from the tuning amplifier 2 is higher than the decision reference value otherwise producing an OFF output, and a unit for calculating the rate of ON output for a predetermined time as the intensity of received pulse light having specific period. This equipment alloxys great amplification of pulse light having specific period and high sensitivity catching of light emitting source and thereby employed generally in photometer, distance measuring equipment, direction measuring equipment, and the like.