▪ Measurements
1. Steady state at ambient
Without thermal compound
OF/E-14 24.5°C TC 1 24.1°C
Tettex 24.4°C TC 2 24.1°C
2. Heating power: 15.3W
Steady state (~0.1°C per minute)
Without thermal compound
OF/E-14 68.3°C TC 1 75.1°C ΔT = -6.8°C
Tettex 57.7°C TC 2 74.6°C ΔT = -16.9°C
3. Heating power: 17.5W
Steady state (~0.1°C per minute)
With thermal compound
OF/E-14 67.4°C TC 1 68.5°C ΔT = -1.1°C
Tettex 65.9°C TC 2 67.4°C ΔT = -1.5°C
Thermal compound is absolutely necessary for measurements on round surfaces! Using
thermal compound, OF/E-14 shows slightly better measurement results than the Tettex probe.
But the OF/E-14 is much easier to handle: The Tettex probe must be positioned exactly according
to its internal PT100 probe position. And it must be fixed in this position, since it is very likely to
slip or turn (the screwdriver in figure 2 serves for this purpose). Otherwise the measurement
performance decreases significantly. The OF/E-14 probe keeps the correct position by itself. See
figure 3.
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