Intrinsically Safe Hall Effect Sensors

• Intrinsically Safe (Class I, Div I and Class I, Zone 0 - code AEx [ia])
• Frequency range: from zero Hertz to 25 kHz
• Model IS190 is a Directional Hall effect or Quadrature sensor;
• Air Gap: Gear target sensors: 1" (25 mm) or more depending on target mass and velocity
  Magnetic target sensors: .160" (4 mm)
• Temperature Range: -40 to 300° deg F (-40 to 150° deg C)
• Shock and vibration resistant and impervious to oily, wet or harsh environments;
• Available in all popular thread and smooth shell sizes
• Intrinsically Safe Hall Effect Gear Tooth Sensor Specs
• Intrinsically Safe Magnetic Hall Effect Sensor Specs

Intrinsically Safe Hall effect sensors are used in manufacturing and flow meter applications to determine speed or direction of shafts, turbines or gears down to zero speed. SPECTEC's Intrinsically Safe magnetic sensors are FM approved per Approval Standard 3610 for Intrinsically Safe (Class I, Div I and Class I, Zone 0 - code AEx [ia]).

Intrinsically Safe Hall Effect Sensor Installation

Installation Note: The Intrinsically Safe Hall effect sensor MUST be installed with an FM Global entity approved barrier. Installations must meet the requirements of intrinsically safe systems for classified locations and must follow details specified in FM Global engineering control drawing #85048.

SPECTEC's zero speed Hall effect sensors are used in industrial applications to determine shaft or gear speed or direction by detecting fluctuations in the magnetic field. The Hall effect technology fulfills a wide array of applications due to a Hall effect sensor's ability to detect zero speed and direction change and produce a digital output that is read by computers, motion control devices, position monitors and digital to analog converters.

SPECTEC has three principal types of Intrinsically Safe hall effect sensors available:

• Magnetic Hall effect sensor is activated by a magnetic target
• Gear tooth sensor is biased by an internal magnetic to be activated by a ferrous target, and
• Hall effect Linear position sensor that detects magnetic field strength.

Intrinsically Safe Hall Effect Sensors for Magnetic Targets

Intrinsically Safe magnetic Hall effect sensors are designed to operate in hazardous locations and switch in the presence of a magnetic field of 50 Gauss minimum. The Hall effect magnetic sensor meets a wide array of applications due to its ability to detect the difference in a magnet's north or south pole disposition. Both uni-polar (activated by either north or south pole magnets) and bi-polar (alternating north-south pole activation) are offered. In addition, an omni-polar model (HO type) is available which responds equally to a north or south pole field and converts it to a digital pulse.

Intrinsically Safe Hall Effect Sensors for Gear Targets

The Intrinsically Safe Hall effect gear tooth sensors are engineered with an internal magnet to switch in the presence of ferrous targets such as gear teeth and blade tips down to absolute zero speed. The Hall effect gear sensor can detect fluctuations in the magnetic field detecting the either the presence or absence of a ferro-magnetic target (i.e. a gear tooth).

The Intrinsically Safe Hall effect gear position sensor has the ability to sense an output shaft or a gear while applying zero drag on the target. Sensor sensitivity allows for detection of as small 0.10" wide and 0.10" deep gear teeth. Air gaps of up to 1/8 inch are possible, depending on gear size.

Intrinsically Safe Hall Effect Sensors for Linear Position Sensing

The Intrinsically Safe Linear Position Sensor detects continuous variations in a magnetic field and converts the field strength to a proportional voltage. The output voltage produced for zero field is nominally 2.5v, with a standard transfer function of +/-10mV/Gauss. Each Intrinsically Safe sensor measures along one axis only. Several linear position sensors can be combined to measure (X, Y, Z) magnet field vectors. Custom ranges, output configuration, sensitivity, and a variety of packaging are available on request.

Every line of intrinsically safe Hall effect sensors include: single output, dual output (for example, frequency and temperature), hermetically sealed, sanitary and conduit mount.

Applications for Intrinsically Safe Hall Effect Sensors:

Intrinsically Safe Hall effect sensor applications such as fine gears, detection of very low to zero speed and the change in target direction in hazardous environments. Hall effect sensors are used in ABS brake systems and as vehicle speed sensors, wheel speed sensors and camshaft sensors.