In this case, the thermowell is fitted so that the bottom end slopes towards the flow direction. The bottom end should be about 20 mm past the center line of the pipe. This is the best way for sensor to take on the temperature of the medium (see fig. 16). In this respect, measuring in a bend can also be favourable (fig. 17). The stump of the line, in which the thermowell is mounted. May not be too long. Otherwise too mach heat will be lost and the measured temperature will be too low.