GTN Series
Hall Effect Gear Tooth Sensors
Features
• Digital current sinking output (open collector)
Benefits
• Better signal to noise ratio than variable reluctance
sensors, output amplitude not dependent on speed
• Resistant to damage from incorrect wiring
• Suitable for most vehicle applications
• Physical protection and cost effective installation.
• Allows breakages or short circuits in sensor power supply
to be detected.
• Integrated reverse polarity protection
• Measuring range 2 Hz to 9 KHz (depending on target)
• Rugged package with connectorized output
• Diagnostic detection of sensor power supply
Description
GTN Series Gear Tooth Sensors use a magnetically biased
Hall effect integrated circuit (IC) to accurately sense
movement of ferrous metal targets. This specially designed
IC, together with protection and diagnostic circuitry and a
permanent magnet, is sealed in a rugged probe type
package.
Installation
The sensor is flange mounted with a range of possible
lengths, eliminating adjustment and positioning. Connection
is by AMP Superseal 1.5 Series.
Typical Applications
The compact design and rugged construction make this
sensor the preferred solution for applications such as :
• Measuring rpm in gearboxes
• Monitoring rpm and position of crankshafts and camshafts
• Pulse counters
• Tachometers
Operation
The flux density of the permanent magnet alters when
approached by ferrous metal. This is detected by the Hall IC.
If the sensor is positioned at the circumference of a revolving
gear wheel, for example, it detects teeth and tooth spaces,
supplying a digital pulse output with frequency proportional
to gear wheel speed. Optimum performance is dependent on
the following variables which must be considered in
combination : target material, geometry and speed, sensor/
target gap, ambient temperature and stray fields.
An integrated electronic diagnostics feature enables
detection of open or short circuits in the power supply line by
monitoring levels in the sensor output.
!
WARNING
MISUSE OF DOCUMENTATION
• The information presented in this product sheet (or catalogue) is for
reference only. DO NOT USE this document as product installation
information.
• Complete installation, operation and maintenance information is
provided in the instructions supplied with each product.
Failure to comply with these instructions could result in death
or serious injury.
Sensing and Control
Technical Data
Supply voltage
4.5 V to 32 V absolute maximum
8 V to 16 V nominal (12 V version)
21 V to 32 V nominal (24 V version)
Current input
Output data (open collector)
20 mA nominal (max 40 mA)
high
low
Pull-up voltage
Switching performance: rise time
fall time
Measuring range
Degree of protection
Ambient temperature
Vibration
Shock
18 kOhm
1 kOhm (12 V version)
1.5 kOhm (24 V version)
4.5 V to 15 V (12 V version)
4.5 V to 32 V (24 V version)
10% to 90% 15 us
(according to external
90% to 10% 1 us
wiring, R
pull-up
and U
pull-up
)
2 Hz to 9 kHz (depends on target)
IP 67, IP 68, IP 69K
-40 °C to +125 °C
Up to +150 °C briefly, max 12 h
Vibration test in accordance with
DIN IEC 68 T2-6
Shock in accordance with
DIN ICE 68 T2-27
Repetitive shock in accordance with
DIN ICE 68 T2-29
EMC protection
Included, details available on request
Order Guide
GTN Geartooth Sensors
GTN1A111
GTN1A112
GTN1A113
GTN1A114
GTN1A115
GTN1A116
GTN1A117
GTN1A211
GTN1A131
12 V, connector position 1, 40 mm probe length
12 V, connector position 1, 53 mm proble length
12 V, connector position 1, 77.75 mm proble length
12 V, connector position 1, 83.25 mm probe length
12 V, connector position 1, 95 mm probe length
12 V, connector position 1, 100 mm probe length
12 V, connector position 1, 125 mm probe length
24 V, connector position 1, 40 mm probe length
12 V, connector position 3, 40 mm probe length
Other permutations are possible, contact Honeywell for details
Mounting Dimensions in mm
Warranty/Remedy
Honeywell warrants goods of its manufacture as being free of defective material
and faulty workmanship. Contact your local sales office for warranty informa-
tion. If warranted goods are returned to Honeywell during that period of
coverage, Honeywell will repair or replace 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.
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 application.
Specifications may change at any time 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.
Sales and Service
Honeywell serves its customers through a worldwide network of sales offices
and distributors. For application assistance, current specifications, pricing or
name of the nearest Authorised Distributor, contact your local sales office or:
INTERNET: www.honeywell.com/sensing
E-mail: info.sc@honeywell.com
This publication does not constitute a contract between Honeywell and its customers. The contents may be changed at any time without notice. It is the customer’s
responsibility to ensure safe installation and operation of the products. Detailed mounting drawings of all products illustrated are available on request. © Honeywell 2001
Honeywell Control Systems Ltd
www.honeywell.com/sensing
Newhouse Industrial Estate
Motherwell ML1 5SB
Scotland, UK
100433-EN Issue 2
11/01
UK07
Printed in the United Kingdom on environmentally friendly paper
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