Aluminium Oxide Moisture Sensor

The aluminium oxide (AL2O3) humidity sensor provides accurate determination of dew point, frost stage, ppm, or relative humidity in most industrial gases.

The working basic principle of the aluminum oxide sensor is that its capacitance varies with the dampness concentration. The sensor is able of the two ppm and dew position measurements in most industrial gas streams. Percent Oxygen Transmitters are mounted internally and procedure the sign from the sensor and display the readings on the entrance show panel.

Aluminium Oxide Dampness Sensor Idea
An aluminum layer on a ceramic assist is anodized to sort a slender porous layer of aluminum oxide. The aluminum oxide is then coated with a slender, permeable layer of gold. The gold and the aluminium layers kind the sensor electrodes.





Figure 1. Cross-part of aluminium oxide sensor.

The gold layer is permeable to moisture and conductive. This kinds the next electrode of a capacitor.

The pores in the aluminium oxide layer take in moisture from the gas stream in quantities right proportional to the moisture content of the gasoline stream.

Figure 2. Shut-up check out of aluminium oxide sensor.

The absorption of h2o molecules changes the capacitance of the sensor. The capacitance of the sensor is measured which is then converted to the moisture price.

The radius of the pores in the aluminium oxide layer make the sensor distinct to drinking water molecules.

Makes use of of the Aluminium Oxide Sensor
The aluminium oxide sensor is suitable for use on nearly any application the place moisture measurements are necessary.

Industrial apps for moisture analyzers drop into two places:
Gas Producers: for guaranteeing product good quality
Gasoline Users: to ensure trustworthiness of inert gasoline blankets.
Normal industries demanding the use of humidity measurement products are Semiconductor, Metal Therapy, and Plastics.