3DWhy do you need to monitor oxygen?

The metal 3D printing process involves using laser technology to fuse fine metal powders together layer by layer. Manufacturing parts while reducing the risk of impurities to a relatively low level is a major challenge for the metal additive manufacturing industry. Metal 3D printers usually send their raw materials into an inert environment to eliminate pollution and prevent quality problems. Inert gases such as argon can be used to improve the quality of welding or bonding. This process requires a well-purged printing chamber in which the oxygen in the environment is closely monitored. High levels of oxygen can cause oxidation of the raw material powder, which directly affects the quality of the manufactured parts due to the reduced welding strength between the layers.

The role of inert gases in metal additive manufacturing is crucial. Argon gas prevents oxidation risk by extracting and displacing oxygen from the 3D printing chamber. Argon reduces the oxygen content to ppm levels or lower, creating a perfect environment for the metal parts being built.

Here,To recommend you a detection of low oxygen sensor:SO-D2-010A100C。

The board is GSB board, and the whole set of models is named EGa0202std-D2010A100.

Sensor probe:

010 represents the sensor range: 0.01-1.0%.

A100 indicates the sensor cable length: 2500px.

Board output:

Analog 0-5V (Vout)

Analog 4-20mA (Iout)

Generation of digital output via RS232

This sensor is a limiting current oxygen sensor developed by the SENSORE of Austria specifically for detecting low oxygen volume ratio.

Working principle:

Because the carrier of the current in the zirconia electrolyte is oxygen ions, when a voltage is applied to the zirconia cell, oxygen is drawn through the oxidation junction plate to the anode. If a perforated cover is added to the cell cathode, the rate of oxygen flow to the cathode is limited. Limited by this rate, the current in the cell will reach saturation as the applied voltage is gradually increased. This saturation current is called the limiting current and is proportional to the oxygen concentration in the ambient environment.

SO-D2-010A100C parameters:

Response time: 2~25 seconds

Warm-up time:<30 seconds

Air flow: 100 - 500 (250 best) ml/min

Life: 20000 hours

Working temperature: 200 ℃

Accuracy: ± 100 ppm

Repeatability:<100 ppm O2