An ultrasonic velocity profiler (UVP) have been applied at many experimental and industrial fields to visualize fluid flow and investigate flow characteristics. Conventionally, fixed-point measurement has been assumed in which ultrasonic sensors are installed at a specific position to measure flow velocity profiles. Recently, we have considered mounting the UVP system to robots for applying the UVP measurement to the places that are difficult for humans to directly access. However, conventional UVP devices are difficult to be mounted on robots due to the devices size and weight; It is necessary to miniaturization and weight saving. Then, we developed the portable ultrasonic pulsar/receiver device that can transmit ultrasonic pulse and receive echo signal. In this paper, we report the details of the developed UVP device and the experimental verification results of the effectiveness of this device by comparing with the commercial UVP device.