Zhengzhou, where the wholesale handheld probe? [Zhengzhou Instrument Co., Ltd.] Emi Emi Instrument Co., Ltd., Zhengzhou URL www.hm5117.cn contact: Gujingli 0371 0371 -66227105 -55676313 Fax Business QQ: 2417674438 Address: Zhengzhou City, South Street, West Street intersection (tube 300 meters south of the city committee) Product Description: MCD-140 using a 9-volt battery or rechargeable batteries, open the battery cover when installing the battery, replace the battery positive and negative attention to open on / off switch button, the green light, then the detector can working. Detector sensitivity and detection range can be adjusted until the red light and continuous alarm sound. Sensitivity adjuster counter-clockwise until the red light off the alarm sound disappeared at this time in the most appropriate detector sensitivity and detection range. Handheld detectors detect surface above the surface of the object being inspected area 10-30 mm back and forth constantly scanning. If metal detectors that will sound an alarm and the red light. When the detector is kept at the top of a metal object does not move when the detection signal will automatically be reduced and result in the use of detectors shall constantly scan back and forth, which is very important. Usage: 1. Airports, stations, examination room, pier electronic detection checks 2. Customs, prisons, border control, defense department security checks 3. Medicine, food quality inspection business systems 4. Important places, playground safety inspection 5. Precious metal detection, such as Silver first performance: detector sensitivity is detected mainly by the size, shape and composition determine. Parameters: Voltage 9 V battery or rechargeable battery power of 270 mW Operating frequency 22 kHz operating current