The SMART Position Sensor, 75 mm linear configuration, is a
non-contacting sensing solution for linear absolute position
sensing with enhanced speed and accuracy. It senses the
position of a magnet relative to the sensor from 0 mm to
75 mm [0 in to 3.0 in].
Why is the SMART Position Sensor smart? SMART means
that this is a sensor that can essentially think for itself. The
SMART Position Sensor has the ability to self-calibrate
because it uses a patented combination of an ASIC
(Application-Specific Integrated Circuit) and an array of MR
(magnetoresistive) sensors to accurately and reliably
determine the position of a magnet attached to a moving object
(e.g., elevator, valve, machinery, etc.) so that the object’s
position can be determined.
Resolution of up to 16 bits provides enhanced accuracy
Non-contacting technology can provide enhanced product
The MR array measures the output of the MR sensors
mounted along the magnet’s direction of travel. The output and
the MR sensor sequence determine the nearest pair of MR
sensors to the center of the magnet location. The output of
these two MR sensors is then used to determine the position of
the magnet between them.
With this sensor, Honeywell has utilized MR technology
through the ASIC at a level never before accomplished.
Other configurations are in development.
Aircraft ram door position
life and durability with less downtime
Combined patented MR sensor and ASIC technology
provide enhanced differentiation and performance
Syringe pumps
Air gap of up to 3,0 ±2,5 mm [0.118 ±0.098 in] between
sensor and magnet expands application opportunities
Other output options (CAN bus, RS232) available upon
Cutting and slitting machinery
Elevator level position
Self-diagnostics feature can reduce equipment downtime
Material handling
Small size, taking up less space than most competitive
technologies, allows for use where space is at a premium
Plastic molding machines
IP67 and IP69K sealing allow use in a variety of harsh
Valve position
Wafer handling equipment
RoHS-compliant materials meet Directive 2002/95/EC
Woodworking machinery
Table 1. Specifications
Sensing range
0 mm to 75 mm [0 in to 3.0 in]
0,05 mm [0.002 in]
Supply voltage
6 Vdc to 24 Vdc regulated
0 V to 5 V analog
Supply current
32 mA max.
±0.4% full scale output
sensor only
Reverse polarity
26.4 V at 125 °C [257 °F]
50 mV/mm typ.
Update rate
800 µs
Initial startup time
30 ms
Termination (flying leads)
red = supply voltage, black = ground, green = output
Cable bend radius
40 mm [1.6 in] min.
Operating temperature range
-40 °C to 125 °C [-40 °F to 257 °F]
Storage temperature range
-40 °C to 150 °C [-40 °F to 302 °F]
Air gap
3,0 ±2,5 mm [0.118 ±0.098 in]
Magnet velocity along sensor
292 mm/s [11.4 in/s]
IP67, IP69K
50 G half sinewave with 11 ms duration
sensor and magnet
20 G from 10 Hz to 2000 Hz
Housing material
¼-20 or M6
recommended torque range
6 N m to 8 N m [53.1 in lb to 70.8 in lb]
magnet only
10,000 gauss
Note: Percent linearity shall be the quotient of the measured output deviation from the best fit line at the measured temperature to
the full scale output span.
Figure 1. Sensor Output Performance Chart
Ferrous metal within a
100 mm [3.9 in] radius of
the magnet may affect
sensor performance.
See Fig. 2 for location of “L”.
Ideal output at reference point “A” = 0.560 V; ideal output at reference point “B” = 4.31 V.
Figure 2. Dimensional Drawings (For reference only: mm/[in].)
A = 2X Mounting ear
A = Mounting dog
B = Magnet
C = SMART Position Sensor
B = Mounting ear
Honeywell Sensing and Control
Order Guide
Catalog Listing
SMART Position Sensor, 75 mm linear configuration, 0 mm to 75 mm [0 in to 3.0 in] sensing range,
0 V to 5 V analog output, magnet included
Note: Contact Honeywell for alternative allowable magnet orientations.
Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship. Honeywell’s
standard product warranty applies unless agreed to otherwise
by Honeywell in writing; please refer to your order
acknowledgement or consult your local sales office for specific
warranty details. If warranted goods are returned to Honeywell
during the period of coverage, Honeywell will repair or replace,
at its option, without charge those items it finds defective. The
foregoing is buyer’s sole remedy and is in lieu of all other
warranties, expressed or implied, including those of
merchantability and fitness for a particular purpose. In no
event shall Honeywell be liable for consequential, special,
or indirect damages.
While we provide application assistance personally, through
our literature and the Honeywell web site, it is up to the
customer to determine the suitability of the product in the
Specifications may change without notice. The information we
supply is believed to be accurate and reliable as of this
printing. However, we assume no responsibility for its use.
000676-3-EN IL50 GLO Printed in USA
December 2009
Copyright © 2009 Honeywell International Inc. All rights reserved.