Total Energy Probe, Fuselage Mount, 6mm 
Total energy probe to be mounted to the fuselage pointing up.  This TE probe mounting method is not as accurate as mounting the probe on the vertical stabilizer. 

Diameter of base that fits into the mount: 6 mm
Diameter of collar near base: 10 mm
Diameter of probe: 6 mm
Length: 330 mm (13")
Length of part that fits into 6 mm hole: 28 mm (1.10")
The single o-ring is located in a slot from about 3 to 5 mm from the end of the probe.

ILEC recommends mounting the probe at least 1 m behind the trailing edge of the wing on the top of the fuselage.

These are the very famous ILEC TE probes. Due to the special design of these probes, they offer excellent compensation combined with high insensitivity to sideslip. This feature of the TE-probe is especially important during thermalling, where a small sideslip is nearly unavoidable. The use of TE-Probes for total energy compensation is superior to the usage of membrane systems or electronically compensation, because the latter two methods strongly depend on the accurate measurement of the static pressure. Static measurement is in nearly all aircraft a serious (unsolved) problem, especially in case of sideslip.

ILEC Probes are made out of a very durable aluminum alloy with a golden galvanized surface to protect against corrosion. Due to the low weight, the tendency of our probe to oscillate is less compared to brass or steel probes. Each probe consists of three parts: the sensing head with its two holes, the tube and the mount with O-ring sealing. The probe is simply installed by pushing it into the opening. The O-ring seals, putting tape around the mount is not necessary. After landing, the probe is pulled out and stored at a safe place.

Maintenance of the Probe
It is recomended to grease the connector slightly, e.g. with Vaseline© Before insertion of the probe make sure the edge of the assembly adaptor is rounded. Otherwise the O-ring easily can be cut and destroyed. 

Total Energy Compensation In Practice - Brozel