Archived Product

QTFM (Gen-1)

Compact, low-power, easy to use, extremely accurate.

Superseded

This page documents a previous-generation product, retained for reference. For current products see QTFM Gen‑2.

Overview

QuSpin Total-Field Magnetometer (QTFM) Gen-1 sensor head and control electronics

The QuSpin Total‑Field Magnetometer (QTFM) is a compact, high-sensitivity scalar magnetometer. It can operate in Earth’s field, is extremely accurate and can resolve very minute field changes. Our sensor is among the highest performing in the world. A compact, low-power package makes it ideal for use in a wide range of existing and emerging applications such as in magnetic observatories and aboard small, mobile platforms.

→ Compact, low-power, easy to use, extremely accurate.

Technical Specifications

Field Sensitivity <1 pT/√Hz in 0.1–100 Hz band
Deadzone Single equatorial plane, ± 7 deg
Heading error Below 3 nT (uncompensated)
Dynamic Range 1000 nT to 100000 nT
Power 5 V to 19 V, 2 W total (sensor + electronics), 3 W during startup
Operating temperature range −30 °C to +60 °C
Calibration None required
Outputs UART, USB
Dimensions 19 × 19 × 47 mm (sensor)
Weight 18 g (sensor)
Slew rate 10000 nT/s
Max gradient 100 nT/cm (ideal < 30 nT/cm)
Max data rate 400 samples/s
Atomic species Rubidium

Export Restrictions

QTFM is export controlled by the US Department of Commerce (ECCN: 6A006.a.2). QTFM can be shipped to most European countries, Japan, Australia, and South Korea without a license. Some key countries such as China, India, Russia are excluded and a license from the DOC is required before QTFM can be shipped to these countries. A license approval can take over 8–12 weeks and requires detailed information on the end-user and end-use application.

A low-performance variant of the QTFM sensor (QTFM‑B) with sensitivity worse than 20 pT/√Hz (ECCN: 6A996.a) is now available which can be shipped to nearly all countries without a license. The only operational difference between QTFM and QTFM‑B is sensitivity.

Key Applications

Geophysics, space, mineral and energy prospecting, unexploded ordnance detection, research

Pricing per sensor (USD)

Quantity Price per sensor
Qty 1–3$10,000
Qty 4–7$8,500
Qty 8+$8,000

Please call for pricing for larger volumes or potential OEM applications.

Magnetic power spectral density measured with two QTFMs placed outdoors

Magnetic power spectral density measured by two QTFM sensors separated by one meter, with the subtracted signal shown
Two QTFMs separated by 1 m: The subtracted signal gives the combined noise of both magnetometers plus any noise in the field gradient. Click image for a high-resolution view.