The purchase of metal detection machines is mainly carried out from the following aspects:

1. Conveying method

Determine the transportation mode and caliber of the machine according to the nature and flow of the material.

The physical properties and flow rate of the materials to be inspected are clearly defined, and the metal inspector who chooses which conveying method is determined accordingly. At present, the main transportation methods are: gravity drop (descent) and belt transportation. In order to determine the diameter of the channel and ensure the smooth passage of the material, the flow rate must also be met. Under the premise of meeting these conditions, the smallest channel diameter is the best choice.

2. Detection accuracy

Metal impurity removal accuracy (sensitivity)

The name of the metal detector is clearly stated. It is a machine for detecting metal impurities. Therefore, the ability to effectively remove sufficiently small metal impurities is the core of measuring the quality of metal detectors, which is technically called "sensitivity". The sensitivity in this manual refers to the diameter of the metal material ball that the machine can detect (for example, iron 0.5mm, that is, the smallest iron ball diameter that the machine can detect is 0.5mm without conveying materials at the same time).

The expression of this sensitivity often gives people an illusion, because the volume of the ball=3.14xDxDxD/6 (D is the diameter of the ball), such as 0.1mm and 0.2mm balls. Under normal circumstances, the difference of 0.1mm does not seem to be large, but This is not the case. The volume difference between the two balls is as high as 8 times. The actual detection effect is incomparable, and it is not a grading machine at all.

The sensitivity is not as high as it needs. The increase in sensitivity is proportional to the input cost. As the sensitivity requirements increase, production costs are rising rapidly. Therefore, high sensitivity means that the material of the machine is better, the production equipment that needs investment is more complicated, the processing process is more complicated, the technical solution is more complicated, and the production reference standard is higher.

High sensitivity is the result of excellent materials and advanced technology. This kind of machine has high reliability and low failure rate is inevitable.

The use process of the machine is also an aging process, which gradually deviates from the normal working state of the machine. High sensitivity means a large margin and strong resistance to deviation.

Some users said, "I don't need to buy a machine that is more demanding than mine." Our answer is: at the same price, choosing a relatively sensitive machine is more in our own economic interests.

3. Machine stability

The stability of the metal detector means that the machine can reliably detect the required metal balls, and there are no moving objects or people around the machine. When other equipment on the production line is working normally, the metal detector remains in this state. Indicators such as the number of false alarms, the number of detections, the false alarm rate, and the detection rate meet the requirements. Various performance indicators are stable and reliable, with few errors and problems.

4. Accessibility

Small functions such as automatic elimination and counting can indeed bring great convenience to work.

5. Appearance material

Determined according to your own requirements, usually used for waterproof requirements, humidity requirements, cleaning requirements, and the use of body materials.

6. Price

Plan to buy the machine at what price, do price performance analysis, choose the lowest price for the same performance, the same price, and the best performance.

7. Acceptance

Check after installation at the actual use site to see the effect.

8. After-sales service

It depends not only on whether there are many after-sales service outlets, but also on its service attitude and whether it has technical capabilities.