LEMI 019

Lviv Centre of Institute of Space Research

LOW NOISE MINIATURE FLUX-GATE
MAGNETOMETER LEMI-019

Main features:

	Super low noise
	Very low power consumption
	Two analog outputs - filtered and unfiltered
	Low weight
	Waterproof construction

Miniature one-component flux-gate magnetometer LEMI-019 is intended for the measurement of one component of the magnetic field vector in land conditions. The instrument has two outputs: low-sensitivity unfiltered output for rough estimation of magnetic field intensity and high-sensitivity filtered output for measuring of its weak fluctuation in the frequency band 0.02 - 5 Hz. Its peculiarities are low noise together with very low power consumption.

Innovative Aspect and Main Advantages

The developed magnetometer has numerous know-hows implemented and allows reaching minimal possible sensitivity threshold in comparison with other known versions on the market. Other major advantage is that simultaneously lowest possible consumed power of the magnetometer is provided what makes these devices indispensable for autonomous systems.

Serious advantage is also very competitive price – no more than 70% of regular market price for competitive devices

Areas of Application

	Detection of slowly varying magnetic field variations in 0.02 – 15 Hz frequency range, Earth’s magnetic field natural fluctuations.
	Detection of metallic objects movement
	Gradiometric measurements
	Systems of tracking
	Intrusion alarm systems

Stage of Development

Magnetometer is already on the market, and LC ISR produces them for individual orders in the amount of 200-300 magnetometers per year.

TECHNICAL SPECIFICATIONS

Measurement range: at the unfiltered output at the filtered output	± 60000 nT ± 15 nT
Frequency band of received signals: at the unfiltered output at the filtered output	DC - 15 Hz 0.02 – 5 Hz
Transformation coefficient value: at the unfiltered output at the filtered output	0.05 mV/nT 270 mV/nT
Transformation coefficient error (both outputs)	± 5 %
Magnetic noise level at 1.0 Hz	≤ 15 pT/√Hz
Noise rejection at 50 Hz (only at the filtered output)	≥ 60 dB
Power supply voltage	± (3.5 ± 0.3) V
Power consumption	≤ 30 mW
Temperature range of operation	0 ... + 70^oC
Dimensions: sensor electronics box	l = 60 mm, d = 17 mm 100 x 20 x 40 mm
Weight	≤ 0.16 kg