Metal Detector Sensitivity
Selecting the Right Level of Sensitivity
Contrary to many of our competitors we provide precise information concerning the sensitivity of all of our devices. We know about the high-capacity of our products and we take practical values as a basis, that cannot only be achieved in a laboratory but also in the real application. Each device passes several tests previous to the delivery in which all parameters are collected and checked. The constancy of our production is guaranteed by ISO 9001. Thus not realiable data and bad surprises are impossible. Please check carefully which values are presented to you. If you want to we will check your product gratis in advance in our headquarters. By this you receive precise information concerning the sensitivity. In practice a reduction of the sensitivity can be caused by:
- The Product Effect
- Electromagnetic Pollution
- Location and Position of installation
Our detectors are equipped with features restraining interferences. This allows application also under difficult conditions. Nevertheless our sensors are subject to physical barriers and will be influenced negatively by strong interferences as above mentionned.
How to Determine Sensitivity
The sensitivities stated in this catalogue respectively in the data sheets have been measured under the following conditions:
- The device is switched-on for at least 5 minutes.
- The ambient temperature is at 20 .. 25C.
- There is no interference caused by electromagnetic fields.
- There is no interference caused by mechanical vibrations.
- The vibration filters of the operating electronics are deactivated.
- The sensitivity test is effected using certified test objects.
- The test objects are either ferrous, non-ferrous (brass) or made of stainless steel 316.
- The smallest available dimensions of these test objects are: ferrous objects 0,3 mm, non-ferrous objects 0,3 mm and stainless steel objects 0,5 mm. The test objects are not available in all in-between sizes. That is why certain data has been determined arithmetically and can be verified using the nearest big test object size available. For the sensitivity test the test objects are always led centrically (most unfavourable position) through the sensor.
- For downstream sensors and extractors the test velocity is at 3000 mm/s. The fall height for downstream sensors is at maximum 0,6 m. The test velocity for conveyor detectors is at 300 mm/s. Inline and Inflex sensors are tested at 500 mm/s.