Zj-54d thermocouple gauge energizes the heating wire and adds a stable and constant heating power. In low vacuum, the vacuum degree is reflected according to the phenomenon that the smaller the heat conduction ability of gas molecules, the higher the vacuum degree is. The higher the vacuum, the fewer gas molecules there are.
The thermocouple gauge is composed of heating wire, thermocouple wire and glass shell:
The specific working principle is as follows: the less heat the gas molecules take away from the hot wire, so the greater the induced thermoelectric potential is on the hot wire. According to the thermoelectric potential, the vacuum degree of the hot wire is mostly composed of tungsten wire, and the thermocouple is composed of copper-Constantin-Chromium-Constantin-Chromium-Aluminium-Nickel.
The thermocouple vacuum gauge electrifies the heating wire and adds a stable and constant heating power. In the low vacuum, the vacuum degree is reflected according to the phenomenon that the smaller the heat conduction ability of the gas molecules, the higher the vacuum degree is. The higher the vacuum, the fewer gas molecules there are.
What are advantages of a thermocouple gauge vacuum gauge?
The thermocouple gauge vacuum gauge is a kind of thermal conductivity vacuum gauge. When a section of metal wire is plugged into a conduit for electrification and heating, the temperature of the hot wire is related to the thermal conductivity of the gas, that is, the vacuum degree. The better the vacuum degree is, the worse the thermal conductivity is, the higher the temperature of the hot wire will be. Therefore, the measurement of the temperature of the hot wire can be used as a measure of the vacuum degree. The temperature change of hot wire is measured by converting thermocouple into potential signal. The measuring range of the thermocouple gauge vacuum gauge is 0.1~100 Pa. Its reading should be calibrated in advance at a specific heating current. When in use, the heating current should be adjusted to the calibration current and kept constant. The advantage of the thermocouple gauge vacuum gauge is that it is simple to use and can read continuously in the low vacuum range of 0.1 ~100 Pa.
Main technical parameters
1. Measurement range: 4× 102-1 ×10-1Pa
2. Heating current: 28±1.5mA
3, the cold resistance of the wire: 9.5 + / – 1 Ω (23 + / – 3 ℃)
4. Hot wire temperature: 40~150℃
5. Scattered: not more than ± 20%
6. Vacuum connection form and baking temperature:
15 + / – 0.1 Φ metal 80 ℃
KF10 quick discharge flange 80℃
KF16 quick discharge flange 80℃
KF25 quick discharge flange 80℃
KF40 quick discharge flange 80℃
CF16 ultra high flange 450℃
CF25 ultra high flange 450℃
CF35 ultra-high flange 450℃
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