Two ellipse-shaped thermal probes are developed to measure the pulverized coal concentration and the air flow rate in a horizontal pneumatic pipe. The longer chord is 10 millimeter and the shorter chord is 5 millimeter for the thermal probes. The probe 1 is mounted in the pipe with its longer chord parallel to flow direction and the probe 2 is mounted with the shorter chord parallel to flow direction. It is found that the probe 1 has obscure response to the concentration of pulverized coal

while the probe 2 gets remarkable. The momentum response and the thermal response in gas-solid two-phase flow are analyzed for the probes. The revised Reynolds number and the revised Nusselt number are put forward. The dimensionless correlations are obtained for description of the heat transfer performances of the probes. The results show that the flow rate of air and the concentration of pulverized coal can be measured with these two coupled thermal probes. The relative biases are within 20% and 10% for coal concentration and air flow

respectively.