Troubleshooting & Maintenance 1
1. Overview
The Walk Through Metal Detector (WTMD) mainly detects whether the pedestrian is carrying metallic, prohibited or
dangerous items for security and safety purpose. At present, our company’s WTMD products are suitable for all the
low, medium and high-end markets. The products, listed in the order from low to high-end, are ZK-D1010S, ZK-
D1065S, ZK-D2180S, ZK-D3180S, ZK-D4330, PD-300.
2. Product Information
2.1 Product features
ZKTeco’s Walk Through Metal Detector is designed based on the electromagnetic principle and is widely used in
security checkpoints. The technical principle of each type of WTMD is the same. There is no difference in terms of
the structure as well. The main difference is the function of the control unit and the coil in the door plank. The
ability of the control unit to process information varies; technical parameters of each type of WTMD are different.
When the infrared light emitted by a pair of infrared sensor is blocked, the control unit will start to check if the data
of each acquisition board changes. If there is any change, the alarm light bar representing the area where the
change locates will light up. If there is no any change, it will not trigger the alarm.
2.2 Product introduction (Take ZK-D4330 as an example)
ZK-D4330 is a high performance WTMD with advanced micro-processing technology and digital pulse technology.
It has high detection sensitivity, anti-interference feature as well as stable performance.
