High Sensitivity Handheld Metal Detector

Manufacturer of High Sensitivity Handheld Metal Detector, Alarm: Sound & vibration, Battery 9V
(MD-300 Metal Detector Instruction Manual)

General introduction:
MD-300 metal detector is a min-type hand held metal detector, mainly for security checking important places like customs, airport court. It will give an alarm sound and vibration with low voltage power alarm.

How to operate:
1. Loosen the cover board of the battery holder with a small screw, push the cover board back ward to remove it, install new 9V alkaline battery while mainly focusing on the battery polarity, push the cover board back on the battery holder and tighten the securing screw on the battery holder.

2. Hold the handle of the metal detector and change the three-position switch on left from the off position to the alarm position. The green LED power indication light of the detector will be turned on and one can hear a short beep.

3. Use a metal coin to test your metal detector function. The buzzer shall give an alarm sound when the detection set swings above the metal coin horizontal and passes the metal coin object.

4. Change the alarm position to vibration position, the palm shall sense the vibration and no alarm sound shall be heard when the detecting set swings above the metal coin horizontal yand pass the meal coin object.

5. Sensitivity adjusting methods: Adjust the sensitivity in the "sensitivity adjusting hole" on the right of the metal detector with a small slotted screw driver. Adjust clockwise to increase the sensitivity and anti clock wise to reduce the sensitivity.
Steps are as follows: Firstly adjust clockwise till you hear continuous alarm sound in non-metal testing. Then you can adjust anticlockwise a little, namely till the detector will not give an alarm sound. The metal object testing sensitivity of a one yuan coin set by the factory is about 5cm.
Special tips: Fake alarm will occur if you adjust the sensitivity too high to exceed your need. When you don't need high sensitivity, you can adjust the sensitivity too high to exceed your need. When you don't need high sensitivity, you can adjust the detector anticlockwise till reaching the level meeting your needs with a small slotted screwdriver.

6. Low voltage alarm: When you turn on the power switch of the metal detector but hear continuous alarm sound given by the buzz, it means the battery voltage has become low in the internal metal detector and you should replace it with a new for later use.

7. Maintenance: Please change the switch to the off position when you don't use the metal detector and dry appearance, to do that, you can use wet cloth to wipe it but shall not use any chemical detergent.

Note: This Handheld Metal Detector is manufactured by NORTHVISION