Honeywell's magnetoresistive (MR) sensors are the most sensitive, low field, solid state magnetic sensors available to measure direction and magnitude of magnetic fields from 70 mG (7 nT) to 6 G (0.6 mT). Honeywell's magnetoresistor sensors can determine the change in earth's magnetic field due to the presence of a ferromagnetic object or position within the earth's magnetic field. The high bandwidth allows detection of vehicles and other ferrous objects at high speeds. The sensors are contactless and the working distance is dependent on the ferromagnetic mass it is measuring.
This means that the devices are suitable for many applications other than simple compassing, such as platform levelling or proximity detection for example.

Honeywell’s three-axis magnetic sensor hybrid uses three permalloy
magnetoresistive transducers and custom interface electronics to measure the strength and direction of a magnetic field. The transducers are sensitive to magnetic fields along the length, width and height ( x, y, z axis) of the
20-pin dual-in-line hybrid. Fields can be detected less than 40 microgauss and up to +/-2 gauss. Analogue outputs are available for each x, y, z axis from the hybrid. With the sensitivity and linearity of this hybrid, changes can be detected in the earth’s magnetic field to provide compass headings or attitude sensing. The high bandwidth of this hybrid allows anomaly detection of vehicles, planes and other ferrous objects at high speeds.

The hybrid is packaged on a small board (1” x 0.75”) and has an on-chip voltage reference that operates from a single 6 to 15V supply. The hybrid is ideal for applications that require two- or three-axis magnetic sensing and have a very tight size constraint and/or have their own electronics and only need a magnetic transducer front-end.
Patented integral field straps are accessible for applying offset fields or closed loop operation.

Applications
Compassing
Navigation Systems
Attitude Reference
Traffic Detection
Proximity Detection
Medical Devices

Features & Benefits
Small Cost Effective Package: DIP-20 footprint (1 in. x .75 in.) allows easy insertion into system-level boards, reducing development costs.
Solid State: All components are solid state, improving reliability and ruggedness compared to mechanical fluxgates.
Wide Dynamic Range: Accurately measures fields from 40 micro-gauss to ±2 gauss at 1V/gauss. Low noise instrumentation amplifiers with 1kHz low pass filters, reject unwanted noise. There are no flux concentrators used in this design that can lead to hysteresis and non-repeatability.
Internal Reference: An externally accessible +2.5V reference improves measurement accuracy and stability. An on-board excitation current source reduces temperature errors and regulates the power supply input.
Offset and Set/Reset Straps: Magnetic field offsets or closed loop circuits can be applied using the built-in straps. Output signal accuracy may be enhanced by using the integral set/reset straps.
Non-Magnetic Material: All components are specially selected and packaged in nonmagnetic material to reduce magnetic distortion and offsets.

Honeywell's three-axis smart digital magnetometer (HMR) detects the strength and direction of a magnetic field and communicates the x, y and z component directly to a computer. Three independent bridges are oriented to sense the x, y and z axis of a magnetic field. The bridge outputs are then converted to a 16-bit digital value using internal delta-sigma A/D convertor.

Applications
Compassing - Avionics and Marine
Remote Vehicle Monitoring (Roll/Pitch/Yaw)
Process Control
Laboratory Instrumentation
Anomaly Detection
Traffic and Vehicle Detection
Security Systems

Features & Benefits
Microcontroller Based Smart Sensor
Low Cost and Easy to use - just plug and play
Range of ±2 Gauss: <70 µGauss Resolution
High Accuracy over ±1 Gauss: <0.5%FS
Output rate selectable: 10 to 154 Samples/Sec
Three-Axis Digital Output: BCD ASCII or Binary
RS-232 or RS-485 Serial Output: 9600 or 19200

A Development Kit is available which includes one Magnetometer in an aluminium enclosure, cabling with power supply, demonstration software (DOS) for a Windows compatible PC and an Operating Manual.

Note: This product is available as a stand alone product or as a development kit, and may be configured in an aluminium enclosure or as a circuit card.

Honeywell’s three-axis strapdown magnetometer detects the strength and direction of the earth’s magnetic field and communicates the x, y, and z component directly via serial bus. The HMR2300r is compliant with applicable MIL-STD-810E requirements for military and commercial flight systems. It was designed to be a replacement for bulky fluxvalve magnetic sensors commonly used in aviation systems.

Applications
Navigation Systems - Avionics and Marine
Fluxvalve Replacement
Can be Slaved to AHRS System
GPS Backup Systems
Remote Vehicle Monitoring
Unpiloted Air Vehicles (UAVs)
Navigation/Attitude for Satellites

Features
Strapdown Magnetometer Replaces Bulky Fluxvalves
Microprocessor Based Smart Sensor
Readings can Achieve Heading Resolution of 0.02°
Range of ±2 Gauss: <70 mGauss Resolution
Rate Selectable: 10 to 154 Samples/Sec.
Small Size: 2.83 in: Fits in ML-1 Style Enclosure
Repeatable and Reliable: MTBF >50,000 hours

A Development Kit is available which includes one Digital Compass Module in an aluminium enclosure, cabling with power supply, Windows based demonstration software for a windows compatible PC and an operating Manual.

         without enclosure                                                   with enclosure

Electronic compass module that provides heading, pitch and roll output for navigation and guidance systems. Honeywell’s solid state magnetoresistive sensors make this strapdown compass both rugged and reliable. This compass provides fast response time up to 20 Hertz and high heading accuracy of 0.5° with 0.1° resolution.

Applications
Oceanographic: Marine Compassing, Positioning of Buoys, Underwater Structures
Drilling: Down Hole and Directional Attitude Reference
Heading: Navigation of Unmanned Vehicles, Avionic Compassing
Integration with GPS: Dead Reckoning
Satellite Antenna Positioning
Laser Range Finders: Surveying Applications

Features
Fast Response: Time Built with solid state magnetic sensors and no moving parts improves response time, allowing faster updates compared to gimballed fluxgates.
Small Size: Available as a circuit board 33 x 76mm, weighing less than one ounce, or in an aluminum enclosure.
Low Power: Operates with less than 35 mA, allowing for long operation with a battery.
High Accuracy: Accuracy better than 0.5° with 0.1° resolution for critical positioning applications.
Wide Tilt Range: Tilt range of ±40° for both the roll and pitch allows operation for most applications.
Hard Iron Compensation: Calibration routines to compensate for distortion due to nearby ferrous objects and stray fields, such as vehicles.
User Configurable Features: User settings of baud rate, update rate, output format, units, filter settings, deviation angles, alarms and warnings are stored internally in non-volatile memory.

HMR3000 Development Kit

The development kit comprises an HMR3000 with enclosure, power supply, serial leads and software to allow evaluation of the Honeywell Magnetic Sensor products.

HMR3100 module shiown with its development board

The Honeywell HMR3100 is a low cost, two-axis electronic compassing solution used to derive heading output. Honeywell’s magnetoresistive sensors are utilised to provide the reliability and accuracy of these small, solid state compass designs. The HMR3100 communicates through binary data and ASCII characters at four selectable baud rates of 2400, 4800, 9600, or 19200. This compass solution is easily integrated into systems using a simple USART interface.

Features
5° Heading Accuracy, 0.5° Resolution
2-axis Capability
Small Size (19 x 19 x 4.5mm), Light Weight
Advanced Hard Iron Calibration Routine for Stray
Fields and Ferrous Objects
0° to 70°C Operating Temperature Range
2.6 to 5VDC Single Supply Operation

Electronic compassing solutions that provide heading information for use in navigation and guidance systems. Honeywell’s magnetoresistive sensors are utilised to provide the reliability and accuracy of these small, solid state compass designs. These compass solutions are easily integrated into systems using a UART interface in ASCII format. The HMR3300 is a three-axis, tilt compensated compass that uses a two-axis accelerometer for enhanced performance up to a ±60° tilt range. The HMR3200 is a two-axis compass. Performance is optimised in vertical or horizontal orientations.

Applications
Compassing & Navigation: General Purpose, Marine Compassing, Navigation of Unmanned Vehicles
Attitude Reference
Satellite Antenna
Positioning
Platform Levelling
Integration with GPS: Dead Reckoning
Surveying Applications: Laser Range Finders

Features
Accuracy: 1° heading accuracy, 0.1° resolution and 0.5 degrees repeatability.
Tilt Range: The HMR3300 may be operated up to a ±60° tilt range for both pitch and roll. Accuracy and performance are enhanced over a wider range of operating conditions and applications with this feature. The HMR3200 is not tilt compensated. Performance is optimised in horizontal or vertical orientations.
Small Size: Available as a circuit board. Dimensions are 1.0 x 1.45 x 0.4 inches (25.4 x 36.8 x 1.1 millimetres).
Low Power: Typical operating current is 18 mA for the HMR3200.
Hard Iron: Embedded hard iron calibration compensates for distortions due to ferrous objects and stray fields.
Response Time: The HMR3200 has 15Hz response time for faster updates compared to gimballed, mechanical fluxgate compasses.

Developments Kits are available for each of these products, which include a plug-in circuit board with an RS232 output.

HMC1055 'Tilt Compensated' Compass Device Set

The Honeywell HMC1055 3-Axis Compass Sensor Set combines the popular HMC1051Z one-axis and the HMC1052 two-axis magneto-resistive sensors plus a 2-axis MEMSIC MXS3334UL accelerometer in a single kit. By
combining these three sensor packages, OEM compass system designers will have the building blocks needed to create their own tilt compensated compass designs using these proven components.

The HMC1055 chip set includes the three sensor integrated circuits and an application note describing sensor function, a reference design, and design tips for integrating the compass feature into other product platforms.

Features
3 Precision Sensor Components
2-Axis Magnetoresistive Sensor for X-Y Axis Earth’s Field Detection
1-Axis Magnetoresistive Sensor for Z-Axis Earth’s Field Detection
2-Axis Accelerometer for 60° Tilt Compensation
2.7 to 5.5 volt Supply Range
3-Axis Compass Reference Design Included

HMR4001 Linear Position Sensor Module

The Honeywell HMR4001 is a high-resolution single sensor module capable of measuring linear or angular position. Advantages include high sensitivity so lower cost magnets such as alnico or ceramic can be used, insensitivity to shock and vibration, and ability to withstand large variations in the gap between the sensor and the magnet.

The HMR4001 is manufactured with Honeywell's HMC1512 Magnetic Displacement Sensor IC, which provides better performance than Hall Effect devices and only needs a magnetic field source greater than 80 gauss. Dual frequency PWM and analogue outputs plus a sleep mode function are included on board.

Features
0-10 mm Magnetic Travel (Magnet Dependent)
Continuous PWM and Analogue Voltage Outputs
0.2mm Accuracy (Magnet Dependent)
0.05mm Repeatability
-40° to +85°C Operating Temperature Range
1%/100°C Temperature Effect
Small PCB Package
6 to 20 volt DC Single Supply Required

HMR4007 Position Sensor

The Honeywell HMR4007 is a high-resolution electronic linear position-sensing module capable of measuring extended range linear position by
providing a digital indication of position of a target magnet. Advantages include insensitivity to shock and vibration, known position at power-on,
ability to withstand large variations in the gap between the sensor and the magnet, and high sensitivity so lower cost magnets (such as AlNiCo or Ceramic) can be used.

The HMR4007 is manufactured with Honeywell’s HMC1501 magnetoresistive (MR) sensors in a stationary array, which provides better performance than Hall Effect devices and only needs a magnetic field source greater than 80 gauss.

Features
0-69 Magnetic Travel (Magnet Dependent)
Microprocessor digital or analogue data outputs
0.1mm accuracy (magnet dependent)
0.1mm repeatability
-40o to +85oC operating temperature range
Regulated 5V or unregulated 6 to 20VDC supply compatibility