Although they respond to dB/dt, the low frequency response can be extended down to 0.001 Hz or less. Thus these sensors can detect very slow changes in magnetic field. Using innovative electronics and modern techniques, we have developed one of the most sensitive induction coil sensor with internal noise of 10-8GHz-1/2. Sensitivity is maintained flat from 0.001 Hz to 1 KHz using a feedback system. The high frequency response is typically around 1 KHz, but composite system with frequencies from 0.001 Hz to hundreds of MHz can be delivered.

There are numerous applications of induction coil sensors- particularly when the change in field is measured. Most of the measurements use the field change for detections and surveillance.

Some of the striking applications include detection of extreme low frequency variations in e.m. field. Because of the wide bandwidth, the same sensor can be used for electromagnetic surveillance over a wide range of frequencies. Applications include most of the typical used of fluxgate magnetometers and additionally:

Magnetiotellurics ELF VLF LF field Mapping Geophysical Prospecting Environmental Applications Cable Location Security and Surveillance

Features:

Extremely low noise>> 5x10-9G Hz-1/2 High sensitivity> 0.1 V/g Extremely low frequency response .001 Hz Upper frequency range 10 Hz Flat frequency response Stable phase response Built in preamplifier 10V output Extremely high dynamic range> 120 dB Very low power consumption Ruggedized and waterproof Fiber optic connection, EMI proof Digital output up to 20 effective bits Length 54 inches Diameter 2.5 inches Weight 20 pounds

Complete acquisition/analysis system

Utilizes magnetic feed back to achieve flat response, natural response >> 200 Hz Can be custom designed to meet requirements. (Uses special design software.)