The ECS K7S5A does have the temp sensor ....... it's located on the mb in the center portion of the (462-pin) zif socket A ....... which would be directly under the cpu when it is inserted into the zif socket.......
There is also another temp sensor located in the area between the cmos battery and the floppy drive connector on the mb .......... this one is for monitoring system temps ...... (ambient temperature inside the case) ..........
These temperature readings can be monitored from the bios under the "Hardware Monitor" title in the bios menu........
I am not familiar with the MBM5 program set-up, but the required mb feature-set is available on this mb.