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Visit our distributor Dimac
Red September 25 to 29 at RADECS in Toulouse, France, organized by
Centre national d’études spatiales. NVE products are inherently reliable,
intrinsically safe, and radiation tolerant. They’ve been selected for Level 1
missions such as the Europa Flyby Mission.
NVE will exhibit at MD&M October 10 to 11 at the Minneapolis Convention
Center. It’s billed as the region’s most comprehensive medical design
and manufacturing event. NVE has decades of experiece with medical sensors, including
life sustaining applications. See us at booth 3630. |
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Current
Sensing
With the World’s Most Sensitive Magnetometers |
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We demonstrate sub-milliamp
current detection using NVE’s ultrasensitive GMR and TMR magnetometers. The
magnetomerters have enough resolution for a coil-free Ground-Fault Circuit Interrupter
(GFCI):
Better Than Coils
Unlike inductive, coil-based solutions, NVE's sensors are ultraminiature and inherently
DC-correct, enabling higher-performance solutions to the most demanding current
sensing requirements.
The World’s Most Sensitive Magnetometers
With sensitivities as high as 500 mV/V/mT, NVE magnetometers are as sensitive
as coils, and can precisely measure fields of less than a microtesla.
Simple Interface
The simple Wheatstone bridge configuration easily interfaces to conventional electronics:
A Coil-Free GFCI Circuit
A Broad Product Line
NVE offers several high-sensitivity analog magnetometers for applications such
as low-current detection, Earth-field detection, position and speed sensing, and
non-destructive analysis:
Part Number
(click for info) |
Tech-
nology |
Sensitivity
(mV/V/mT) |
Linear
Range
(mT) |
Package |
| ALT025-10E |
TMR |
20 |
0 to
10 |
2.5 x
2.5 mm DFN6 |
| ALT023-10E |
200 |
0 to
1 |
[NEW!]
ALT021-10E |
500 |
0 to
0.25 |
| AAH004-00 |
GMR |
40
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0.15 to 0.75
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MSOP8 |
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150
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0.06 to 0.3
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SOIC8 |
Download
the TMR Magnetometer Datasheet »
Download
the GMR Magnetometer Datasheet »
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Chessboard
Demonstration
with Magnetic Switches |
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A New Demonstration
NVE’s AD024-10E
GMR Switch™ sensors are at the heart of a new chessboard demonstration:
Versatile
Unlike most sensors, these sensor outputs can be wire-OR’ed together, which
allows 64 sensors to be multiplexed to 16 I/O pins. The sensors are
mounted on breakout boards and wired to an Arduino. The Arduino scans the 64 sensors,
displays the moves on an LCD display, and reports the moves with voice synthesis.
Sensitive
The GMR sensors are sensitive enough to activate with the basic ferrite magnets
in a magnetic chess set and accommodate a wide range of magnet strengths.
Fast
The sensors’ high speed allows the multiplexing demonstrated in the chessboard,
or duty cycling to reduce power consumption.
Omnipolar
GMR Switches are activated by positive or negative fields, which is essential
since the magnet orientation is random.
A Family of Magnetic Switches
NVE offers seven series of magnetic switch sensors, as summarized below:
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Series
(click for info)
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Supply
Voltage
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Min.
Operate Point
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Features
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Packages
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4.5 –
30 V
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1 mT
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General Purpose
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2.5 x
2.5 mm
DFN6 or
MSOP8
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0.9 –
5.5 V
(4 ranges)
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0.4 mT
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Ultra-
sensitive
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2.4 –
4.2 V
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2 mT
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Ultralow
power;
Ultra-
miniature
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1.1 x
1.1 mm
DFN4
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0.9 –
2.4 V
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1 mT
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2.4 –
4.2 V
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1.5 mT
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Nanopower
without duty-cycling
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0.9 –
1.8 V
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1.5 mT
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0.9 – 1.8 V
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350 mT
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Omni-directional
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Ideal Proximity Sensors
So when it’s “your move” to specify a proximity sensor, don’t
get “rooked” into using cheap, sloppy Hall-effect switches.
AD-Series
Sensor datasheet »
Breakout
board information »
GitHub
repository for the Arduino code »
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