NVE Sensor and Isolator News
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    October 2015 Electrifying  News  From  NVE
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In This Issue
Two-Wire Proximity Sensor
 
Gear Tooth Sensor Demonstration
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Quick Links
Sensor Selector Guide

Isolator Selector Guide

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Document Updates
6 kV Isolator Datasheets

Isolator Catalog
(Updates include 6 kV wide-body Isolators and 12.8 kV surge immunity)
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New Videos
Two-Wire Sensor Interface
Gear Tooth Sensors
Angle Sensors
    6 kV isolation and 44000-year life
1 kV Working Voltage
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Fun Fact
A coffee cup* could hold approximately 700,000 of NVE’s 1.1 millimeter square ADL-Series magnetic switches.

*Although they’re quite rugged, we don’t recommend storing our parts in coffee cups.

More Fun Facts >
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Application Corner
 
Two-Wire Magnetic Proximity Sensor
 
Two-wire sensors are common in industrial control to simplify wiring. But for many sensors, competing constraints make designing two-wire interface circuitry tricky.

Two wire interfaces need to operate over a wide power supply range.
With the sensor off, the circuit must draw a minimal residual current, typically in the range of one milliamp. With the sensor on, the circuit must provide enough current to drive a significant load such as a motor or solenoid. Minimum holding current is another design constraint.

NVE’s ADL-Series sensors are perfect for two-wire applications, because their low supply voltage and low quiescent current provide plenty of design margin.

Here’s a simple reference circuit:
 
2-Wire Sensor Reference Circuit

And here’s a demonstration:

 
ULLGAIn addition to their impressive electrical specifications, ADL-Series sensors feature precise magnetic operate points and an ultraminiature 1.1 millimeter package.

Standard ADL-Series magnetic operate points are 20 and 28 oersteds, with other ranges available by special order.
 
Buy Online
 
New Video
 
Gear Tooth Sensor Demonstration
 
NVE Vice President for Sensors Jay Brown demonstrates the extraordinary wide air-gap range of NVE's unique GMR gear tooth sensors.

 
The demonstration shows the operation of ABL-Series analog gear-tooth sensors (both single and dual bridge) and AKL-Series digital gear-tooth sensors.

GT Sensor™ features include:
  • Wide airgap tolerance
  • DC (zero speed) operation
  • Precise spacing between sensor elements
  • Excellent performance over temperature and voltage
 
ABL-Series analog sensors provide sinusoidal outputs with one cycle per tooth. Dual bridge analog sensors have two out-of-phase outputs for determining direction. AKL-Series digital sensors include signal processing to provide a 50% duty cycle digital modulated current signal.

The demonstration shows a gear driven by a motor with a micrometer adjustment to change the air gap between the sensor and gear. This demonstrates the wide airgap range accommodated by GT sensors—a range of 5 millimeters or more.
 
  Play in NVE Website
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