High Temperature
Industrial VRS Magnetic
Speed Sensors
DESCRIPTION
High Temperature VRS sensors are designed for use in
applications where the sensor is exposed to temperatures up
to 260 ºC [450 ºF]. Sealed Front-End versions are available for
applications where the sensor is exposed to fluids, lubricants
or adverse environmental conditions.
Passive VRS (Variable Reluctance Speed) Magnetic Speed
sensors are simple, rugged devices that do not require an
external voltage source for operation.
A permanent magnet in the sensor establishes a fixed
magnetic field. The approach and passing of a ferrous metal
target near the sensor’s pole piece (sensing area) changes the
flux of the magnetic field, dynamically changing its strength.
This change in magnetic field strength induces a current into a
coil winding which is attached to the output terminals.
The output signal of a VRS sensor is an ac voltage that varies
in amplitude and wave frequency as the speed of the
monitored device changes, and is usually expressed in peak to
peak voltage (Vp-p).
One complete waveform (cycle) occurs as each target passes
the sensor’s pole piece. If a standard gear were used as a
target, this output signal would resemble a sine wave if viewed
on an oscilloscope.
Honeywell also offers VRS sensors for general purpose, high
output, power output, high resolution and hazardous location
applications, as well as low-cost molded OEM versions.
FEATURES
• Self-powered operation
• Direct conversion of actuator speed to output frequency
• Simple installation
• No moving parts
• Designed for use over a wide range of speeds
• Adaptable to a wide variety of configurations
• Customized VRS products for unique speed sensing
applications
• Housing diameters: 5/8 in (M16), 3/8 in (M12),
1/4 in (8M)
• Housing material/style: stainless steel threaded
• Terminations: MS3106 connector, preleaded
• Output voltages: 4.7 Vp-p to 125 Vp-p
POTENTIAL APPLICATIONS
• Engine RPM (revolutions per minute) measurement on
aircraft, automobiles, boats, buses, trucks and rail
vehicles
• Motor RPM measurement on drills, grinders, lathes and
automatic screw machines
• Motor RPM measurement on precision camera, tape
recording and motion picture equipment
• Process speed measurement on food, textile, paper,
woodworking, printing, tobacco and pharmaceutical
industry machinery
• Motor speed measurement of electrical generating
equipment
• Speed measurement of pumps, blowers, mixers, exhaust
and ventilating fans
• Flow measurement on turbine meters
• Wheel-slip measurement on autos and locomotives
• Gear speed measurement
High Temperature
2 www.honeywell.com/sensing
5/8 INCH (M16*) SENSORS (All dimensions for reference only. mm/[in])
*Contact Honeywell for availability of metric mounting thread versions.
LOW RESISTANCE COILS FOR HIGH FREQUENCY APPLICATIONS
General Specifications Test Condition Specifications
Parameter Characteristic Parameter Characteristic Parameter Characteristic
Min. output voltage 25 Vp-p Inductance 30 mH max. Surface speed 25 m/s
[1000 in/s]
Coil resistance 65 Ohm typ. Gear pitch range 24 DP (module 1.06)
or coarser
Gear 20 DP
(module 1.27)
Pole piece
diameter
2,69 mm [0.106 in] Optimum actuator 20 DP (module 1.27)
Air gap 0,127 mm
[0.005 in]
Min. surface
speed
0,50 m/s [20 in/s] typ. Max. operating
frequency
50 kHz typ.
Operating temp.
range
-55 ºC to 230 ºC
[-67 ºF to 450 ºF]
Vibration N/A
Mounting thread 5/8-18 UNF-2A Termination MS3106 connector
Load
resistance
100 kOhm
Catalog
Listing
Weight
3010HTB
70 g [2.5 oz]
HIGH RESISTANCE COILS FOR MAXIMUM OUTPUT VOLTAGE APPLICATIONS
General Specifications Test Condition Specifications
Parameter Characteristic Parameter Characteristic Parameter Characteristic
Min. output voltage 125 Vp-p Inductance 450 mH max. Surface speed 25 m/s
[1000 in/s]
Coil resistance 1055 Ohm typ. Gear pitch range 24 DP (module 1.06)
or coarser
Gear 20 DP
(module 1.27)
Pole piece
diameter
2,69 mm [0.106 in] Optimum actuator 20 DP (module 1.27)
Air gap 0,127 mm
[0.005 in]
Min.
surface speed
0,25 m/s [10 in/s] typ. Max. operating
frequency
15 kHz typ.
Operating temp.
range
-55 ºC to 230 ºC
[-67 ºF to 450 ºF]
Vibration N/A
Mounting thread 5/8-18 UNF-2A Termination MS3106 connector
Load
resistance
100 kOhm
Catalog
Listing
Thread
Length (A)
Weight
3030HTB
3030HTB25
28 mm [1.1 in]
63 mm [2.5 in]
70 g [2.5 oz]
84 g [3.0 oz]
Industrial VRS Magnetic Speed Sensors
Honeywell Sensing and Control 3
5/8 INCH (M16*) SENSORS CONTINUED (All dimensions for reference only. mm/[in])
*Contact Honeywell for availability of metric mounting thread versions.
NOMINAL RESISTANCE COILS FOR LOW IMPEDANCE LOAD APPLICATIONS
General Specifications Test Condition Specifications
Parameter Characteristic Parameter Characteristic Parameter Characteristic
Min. output voltage 45 Vp-p Inductance 85 mH max. Surface speed 25 m/s
[1000 in/s]
Coil resistance 141 Ohm typ. Gear pitch range 12 DP (module 2.11)
or coarser
Gear 8 DP
(module 3.17)
Pole piece
diameter
4,75 mm [0.187 in] Optimum actuator 8 DP (module 3.17)
Air gap 0,127 mm
[0.005 in]
Min. surface
speed
0,38 m/s [15 in/s] typ. Max. operating
frequency
40 kHz typ.
Operating temp.
range
-55 ºC to 230 ºC
[-67 ºF to 450 ºF]
Vibration N/A
Mounting Thread 5/8-18 UNF-2A Termination MS3106 Connector
Load
resistance
1.25 kOhm
Catalog
Listing
Thread
Length (A)
Weight
3040HTB
3040HTB25
28 mm [1.1 in]
63 mm [2.5 in]
70 g [2.5 oz]
84 g [3.0 oz]
High Temperature
4 www.honeywell.com/sensing
5/8 INCH SEALED FRONT-END SENSORS (All dimensions for reference only. mm/[in])
(No metric available.)
NOMINAL RESISTANCE COILS FOR LOW IMPEDANCE LOADS APPLICATIONS
General Specifications Test Condition Specifications
Parameter Characteristic Parameter Characteristic Parameter Characteristic
Min. output
voltage
60 Vp-p Inductance 85 mH max. Surface speed 25 m/s
[1000 in/s]
Coil resistance 120 Ohm to 162 Ohm Gear pitch range 12 DP (module 2.11)
or coarser
Gear 8 DP
(module 3.17)
Pole piece
diameter
4,39 mm [0.173 in] Optimum actuator 8 DP (module 3.17)
Air gap 0,127 mm
[0.005 in]
Min. surface
speed
0,38 m/s [15 in/s] typ. Max. operating
frequency
40 kHz typ.
Operating temp.
range
-54 ºC to 220 ºC
[-65 ºF to 428 ºF]
Vibration N/A
Mounting Thread 5/8-18 UNF-2A Termination MS3106 connector
Load
resistance
1.25 kOhm
Catalog Listing Weight
MA243HT
98 g [3.5 oz]
Industrial VRS Magnetic Speed Sensors
Honeywell Sensing and Control 5
3/8 INCH (M12*) SENSORS (All dimensions for reference only. mm/[in])
*Contact Honeywell for availability of metric mounting thread versions.
General Specifications Test Condition Specifications
Parameter Characteristic Parameter Characteristic Parameter Characteristic
Min. output
voltage
15 Vp-p Inductance 31 mH max. Surface speed 25 m/s
[1000 in/s]
Coil resistance 110 Ohm max. Gear pitch range 26 DP (module 0.98)
or coarser
Gear 20 DP
(module 1.27)
Pole piece
diameter
2,36 mm [0.093 in] Optimum actuator 24 DP (module 1.06)
ferrous metal gear
Air gap 0,127 mm
[0.005 in]
Min. surface
speed
0,75 m/s [20 in/s] typ. Max. operating
frequency
50 kHz typ.
Operating temp.
range
-40 ºC to 205 ºC
[-40 ºF to 400 ºF]
Vibration N/A
Mounting thread 3/8-24 UNF-2A Termination 24 AWG Teflon-
insulated leads
Load
resistance
100 kOhm
Catalog
Listing
Thread
Length (A)
Weight
3015HTB
3015HTB15
20 mm [0.8 in]
38 mm [1.5 in]
28 g [1.0 oz]
42 g [1.5 oz]
High Temperature
6 www.honeywell.com/sensing
1/4 INCH (M8*) MINIATURE SENSORS (All dimensions for reference only. mm/[in])
*Contact Honeywell for availability of metric mounting thread versions.
General Specifications Test Condition Specifications
Parameter Characteristic Parameter Characteristic Parameter Characteristic
Min. output voltage 4.7 Vp-p Inductance 13 mH max. Surface speed 25 m/s
[1000 in/s]
Coil resistance 137 Ohm max. Gear pitch range 36 DP (module 0.70)
or coarser
Gear 20 DP
(module 1.27)
Pole piece
diameter
1 mm [0.040 in] Optimum actuator 28 DP (Module 0.90)
ferrous metal gear
Air gap 0,127 mm
[0.005 in]
Min. surface
speed
0,89 m/s [35 in/s] typ. Max. operating
frequency
70 kHz typ.
Operating temp.
range
-40 ºC to 230 ºC
[-40 ºF to 450 ºF]
Vibration Mil-Std 202F
Method 204D
Mounting thread 1/4-40 UNS-2A Termination 30 AWG Teflon-
Insulated Leads
Load
resistance
100 kOhm
Catalog
Listing
Weight
3055A
14 g [0.5 oz]
Industrial VRS Magnetic Speed Sensors
Honeywell Sensing and Control 7
1/4 INCH SEALED FRONT-END SENSORS (All dimensions for reference only. mm/[in])
(No metric available.)
General Specifications Test Condition Specifications
Parameter Characteristic Parameter Characteristic Parameter Characteristic
Min. output voltage 5.2 Vp-p Inductance 85 mH max. Surface speed 25 m/s
[1000 in/s]
Coil resistance 20 Ohm to 45 Ohm Gear pitch range 36 DP (module 0.70)
or coarser
Gear 20 DP
(module 1.27)
Pole piece
diameter
1 mm [0.040 in] Optimum actuator 28 DP (module 0.90)
ferrous metal gear
Air gap 0,127 mm
[0.005 in]
Min. surface speed 0,89 m/s [35 in/s] typ. Max. operating
frequency
70 kHz typ.
Operating temp.
range
-73 ºC to 230 ºC
[-100 ºF to 450 ºF]
Vibration Mil-Std 202F
Method 204D
Mounting Thread 1/4-40 UNS-2A Termination 28 AWG Teflon-
insulated leads
Load
resistance
100 kOhm
Catalog
Listing
Weight
MA3055
28 g [1 oz]
Catalog Listing Weight
MA3055S10
28 g [1 oz]
Automation and Control Solutions
Sensing and Control
Honeywell
1985 Douglas Drive North
Minneapolis, MN 55422
www.honeywell.com/sensing
005877-1-EN IL50 GLO Printed in USA
March 2007
Copyright © 2007 Honeywell International Inc. All rights reserved.
WARNING
PERSONAL INJURY
DO NOT USE these products as safety or emergency stop
devices or in any other application where failure of the
product could result in personal injury.
Failure to comply with these instructions could result in
death or serious injury.
WARRANTY/REMEDY
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
application.
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.
WARNING
MISUSE OF DOCUMENTATION
• The information presented in this product sheet is for
reference only. Do not use this document as a product
installation guide.
• 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.
SALES AND SERVICE
Honeywell serves its customers through a worldwide network
of sales offices, representatives and distributors. For
application assistance, current specifications, pricing or name
of the nearest Authorized Distributor, contact your local sales
office or:
E-mail: info.sc@honeywell.com
Internet: www.honeywell.com/sensing
Phone and Fax:
Asia Pacific +65 6355-2828
+65 6445-3033 Fax
Europe +44 (0) 1698 481481
+44 (0) 1698 481676 Fax
Latin America +1-305-805-8188
+1-305-883-8257 Fax
USA/Canada +1-800-537-6945
+1-815-235-6847
+1-815-235-6545 Fax
