The PKI 9885 is a revolutionary, highperformance system designed for detecting any object concealed under the ground or behind walls. It has been designed according to the specific requests of several government authorities worldwide and is now in full operation with Police, Military, VIP-protection and commercial companies. The unit is completely weatherproof and can operate in any type of soil condition. Depth of detection depends on size of object and type of soil, but is typically up to 3 meters. The complete system consists of 3 main parts:
- the controller ( which in fact is a ruggedised personal computer)
- the antenna set
- the transmitter/receiver head, which transmits the information from the antenna to the controller
The PKI 9885 works by sending out pulses of electromagnetic energy and detecting the electrical echo caused by dielectric differences within the surface being investigated. One of the main features is that during a search, as the antenna is moved across a surface, the data is shown in colour and in real time on the monitor. This means that an anomaly beneath the surface can be seen immediately whenever the PKI 9885 passes over it, thus making instant and on-site decisions possible. The data can be downloaded and printed on a paper-strip or stored on the hard disc for further processing or inclusion in a survey report. The standard system is supplied with a 500 MHz antenna which has a typical penetration depth of 1.5 to 2.5 meters in good conditions, i.e. where sand and peat are good and salt water and clay are poor. The other antennas in the range are the 250 MHz (typical penetration depth of 2.5 to 4.5 meters) and the 1 GHz and 2 GHz antennas. As a geneeral guide, the lower frequency antennas (250 and 500 MHZ) are normally used for work below ground and the higher frequency for work above the ground. Important to know is that as soon as the penetration depth increases, the resolution will decrease. Hence the 1 GHz and 2 GHz antennas are very useful for locating very small objects behind a surface – such as a wall.