Abstract: A measuring device used in a four parameter measuring system for measuring simultaneously temperature, pressure, flow rate and steam quality of steam injection profiles during heavy oil recovery by steam injection, comprising: a cable cap, arranged at the top of the device; a measuring section, connected with the cable cap and comprising a metal case, three first pressure sensors and a thermoelectric couple; the first pressure sensors and the thermoelectric couple being longitudinally arranged in the case; a thermal protection section used for safe transmission of the data measured by the sensors and the couple; a thermal isolating section connected to the lower part of the section and a data acquisition, conversion and storage system under the control of the single-chip processor.