Magnetic Microsensor Module

We propose a magnetometer using a MEMS sensor and CMOS signal conditioning circuitry to detect magnetic anomalies generated by the presence and movement of vehicles and troops. The minimum detectable signal is 1 nT and the signal output sampling periodsare 1, 2, or 10 seconds with a serial formatted output. The device has a field life of up to 12 months depending upon the energy of batteries. This magnetometer is autonomous and operates with nanopower CMOS internal circuits detecting thresholdmagnetic fields preset in the range generally below 100 nTesla Rejection is provided to discriminate out the earth field as high as 100 microTesla. Higher frequency acoustics and vibrations filtered.This magnetometer is highly complimentary to the NJMSense-it TM line of remote readout microsensors. The dual use technology will permit retrofitting of the magnetic sensor module directly into many of the existing military and non-military magnetometer products. The NJM magnetometer module will greatlyreduce the price for 1nT sensors and should therefore open up markets that previously were not cost effective. These markets include further penetration into the consumer magnetometer and industrial material sensor /surveillance/security markets.