MHR Series – Minia t ure General Pur pos e AC LVDT
MHR Series Rev. 6 www.meas-spec.com 2015-July
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• Small size and low mass core
• High output signal
• Stroke ranges from ± 0.005 to ±2 inches
• AC operation from 2kHz to 20kHz
• Stainless steel housing
• Imperial or metric threaded core
DESCRIPTION
The legendary MHR Series LVDTs provide precision measurements in space r estrictive applications.
With a diameter of just 3/8 inch [9.5mm], and an extremely lightweight core, the MHR Series is ideal
for applications where excessive core weight could influence the motion of the measurand; with less
inertia, accurate measurement s at higher displacement speeds are easier to achieve. The lightweight
core also reduces mechanical stresses and helps preserve the structural integrity of the core
actuation assembly.
The high output sensitivity resulting from the close electrical coupling between the coil and core
provides ample signal for interfacing with practically all signal conditioners and conditioning circuits.
The magnetic stainless steel housing provides electromagnetic and electrostatic shielding.
The high temperature operation (200oC) version is available for stroke ranges of ±0.025 to ±1 inch
(consult factory). A High pressure (vented case) version is also available (consult factory). The MHR
is compatible with the full line of Measurement Specialties LVDT signal conditioners.
Like in most of our LVDTs, the MHR windings are vacuum impregnated with a specially formulated,
high temperature, flexible resin, and the coil assembly is potted inside its housing with a two-
component epoxy. This provides excellent protection against hostile environments such as high
humidity, vibration and shock.
Measurement Specialties, Inc. (NASDAQ MEAS) offers many other types of sensors and signal
conditioners. Data sheets can be downloaded from our web site at: http://www.meas-
spec.com/datasheets.aspx
MEAS acquired Schaevitz Sensors and the SchaevitzTM trademark in 2000.
FEATURES APPLICATIONS
•
Compact size
•
X, Y, Z stage position feedback
• Lightw eight / low mass core
• Wire-die bonding machines
•
±0.25% linearity (100% stroke)
•
Cylinder position feedback
•
Shock and vibration tolerant
•
Voice coil testing
•
Stainless steel case
•
Materials testing machines
•
Calibration certificate supplied with each unit
•
Space restricted insta ll ati on s
MHR Series – Minia t ure General Pur pos e AC LVDT
MHR Series Rev. 6 www.meas-spec.com 2015-July
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PERFORMANCE SPECIFICATIONS
ELECT RI CAL SPECIF ICATIONS (common)
Input volt age 3 VRMS s i ne wave
Input frequency 2kHz to 20kHz
Test frequency 2.5kHz (standard)
ELECT RI CAL SPECIF ICATIONS @ 10kHz (recommended operation)
Parameter
MHR 005
MHR 010
MHR 025
MHR 050
MHR 100
MHR 250
MHR 500
MHR 1000
MHR 2000
Stroke range ±0.005
[±0.13] ±0.010
[±0.25] ±0.025
[±0.64] ±0.05
[±1.27] ±0.10
[±2.54] ±0.25
[±6.35] ±0.5
[±12.7] ±1
[±25.4] ±2
[±50.8]
Sensitivity V/V/inch
[mV/V/mm] 8.70
[343] 6.05
[238] 8.10
[319] 3.15
[124] 2.80
[110] 2.07
[81.5] 1.96
[77.2] 0.77
[30.3] 0.49
[19.3]
Output at stroke ends
mV/V (*)
43.5 60.5 202.5 157.5 280 517.5 980 770 980
Phase shift +38° +20° +21° +8° +5° +7° +7° -1° -15°
Input impedance
(PRIMARY) 84Ω 165Ω 238Ω 419Ω 400Ω 345Ω 264Ω 155Ω 504Ω
Output impedance
(SECONDARY)
302Ω 300Ω 485Ω 154Ω 200Ω 420Ω 810Ω 450Ω 1780Ω
Non-linearity
±% of FR
@ 50% stroke
0.20
0.10
0.15
0.15
0.15
0.15
0.15
0.20
/
@100% stroke (max)
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.50
@125% stroke
0.30
0.35
0.25
0.35
0.25
0.35
0 .30 (**)
0 .50
/
@150% stroke
0.40
0.35
0.30
0.50
0.30
0.50 (**)
0.75 (**)
/
/
Null voltage (max.) 2.5% FRO 1.0% FRO 0.5% of FRO
(*) Unit for output at stroke ends is milliv olt per volt of input voltage; (**) Requires special reduced core length
ELECT RI CAL SPECIF ICATIONS @ 2.5kHz (standard calibration)
Parameter
MHR 005
MHR 010
MHR 025
MHR 050
MHR 100
MHR 250
MHR 500
MHR 1000
MHR 2000
Stroke range ±0.005
[±0.13] ±0.010
[±0.25] ±0.025
[±0.64] ±0.05
[±1.27] ±0.10
[±2.54] ±0.25
[±6.35] ±0.5
[±12.7] ±1
[±25.4] ±2
[±50.8]
Sensitivity V/V/in
[mV/V/mm] 3.19
[126] 3.36
[132] 4.36
[172] 2.55
[100] 2.40
[94] 1.73
[68] 1.60
[63] 0.70
[27] 0.47
[19]
Output at stroke ends,
mV/V (*)
16 33.6 109 127.5 240 432.5 800 700 940
Phase shift
+73°
+59°
+58°
+36°
+30°
+33°
+23°
+6°
+3°
Input impedance
(PRIMARY)
59Ω 78Ω 116Ω 141Ω 135Ω 147Ω 145Ω 100Ω 304Ω
Output impedance
(SECONDARY)
260Ω 192Ω 286Ω 90Ω 125Ω 268Ω 445Ω 370Ω 13620Ω
Non-linearity ±% of FR
@ 50% stroke
0.20
0.10
0.15
0.15
0.15
0.15
0.15
0.20
/
@100% stroke (max)
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
@125% stroke 0.30 0.35 0.25 0.35 0.25 0.35 0.30 (**) 0 .50 /
@150% stroke
0.40
0.35
0.30
0.50
0.30
0.50 (**)
0.75 (**)
/
/
Null voltage (max)
3% FRO
1.5% FRO
0.5% of FRO
(*) Unit for output at stroke ends is milliv olt per volt of input voltage; (**) Requires special reduced core length
MHR Series – Minia t ure General Pur pos e AC LVDT
MHR Series Rev. 6 www.meas-spec.com 2015-July
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ENVIRONMENTAL SPECIFICATIONS & MATERIALS
Operating tem perature -65°F to +300°F [-55°C to 150°C]
Shock survival 1,000 g (11ms half-sine)
Vibration tolerance 20 g up to 2KHz
Housing material AISI 400 Series stainless steel
Electrical connection Six lead-wires, 32 AWG stranded Copper, PTFE insulated, 1 foot [0.3m] long (longer wires optional)
IEC 60529 rating IP61
Notes:
All values are nominal unless otherwise noted
Electrical specifications are for the test frequency indicated in the table
Dimensions are in inch [mm] unless otherwise noted
FR: Full Range is the stroke range, end to end; FR=2xS for ±S stroke range
FRO (Fu ll Range Output): Algebrai c difference in outputs measured at the ends of the range
MECHANICAL SPECIFICATIONS
Parameter MHR 005 MHR 010 MHR 025 MHR 050 MHR 100 MHR 250 MHR 500 MHR 1000 MHR 2000
Body length “A” 0.375
[9.5] 0.535
[13.6] 0.660
[16.8] 0.815
[20.7] 0.990
[25.1] 1.850
[47.0] 3.300
[83.82] 5.600
[142.2] 8.000
[203.2]
Core length “B” 0.180
[4.6] 0.233
[5.9] 0.400
[10.2] 0.500
[12.7] 0.625
[15.9] 1.125
[28.6] 2.000
[50.8] 3.000
[76.2] 3.00
[76.2]
Body weight oz
[g] 0.07
[2] 0.11
[3] 0.18
[5] 0.21
[6] 0.21
[6] 0.32
[9] 0.60
[17] 0.92
[26] 1.4
[40]
Core weight oz
[g] 0.004
[0.1] 0.007
[0.2] 0.016
[0.5] 0.016
[0.5] 0.025
[0.7] 0.032
[0.9] 0.056
[1.6] 0.088
[2.5] 0.088
[2.5]
Dimensions are in inch [mm]
MHR Series – Minia t ure General Pur pos e AC LVDT
MHR Series Rev. 6 www.meas-spec.com 2015-July
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WIRING INFORMATION
Connect Blue to Green for differential output
ORDERING INFORMATION
Description
Model
Part Number
Description
Model
Part Number
±0.005 inch LVDT
MHR 005
02560405-000
±0.25 inch LVDT
MHR 250
02560410-000
±0.010 inch LVDT
MHR 010
02560406-000
±0.5 inch LVDT
MHR 500
02560411-000
±0.025 inch LVDT
MHR 025
02560407-000
±1 inch LVDT
MHR 1000
02560412-000
±0.05 inch LVDT
MHR 050
02560408-000
±2 inch LVDT
MHR 2000
02561033-000
±0.10 inch LVDT
MHR 100
02560409-000
OPTIONS
5.0 kHz calibration
XXXXXXXX
-002
10 kHz calibrat ion
XXXXXXXX
-003
Metric threaded core
XXXXXXXX
-006
10 foot long lead-wires
Consult factory
XXXXXXXX-040
Note: Add multiple option dash numbers together to determine proper ordering suffix
Example: MHR 1000, ±1 inch, with 5 kHz calibration and metric thread ed core, P/N 02560412-008
ACCESSORIES
Core connecting rod, 6 inches long, 1-72 threads
05282945-006
Core connecting rod, 12 inches long, 1-72 threads
05282945-012
Core connecting rod, 24 inches long, 1-72 threads
05282945-024
Core connecting rod, 36 inches long, 1-72 threads
05282945-036
Core connecting rod, 6 inches long, M2x0.4 metric threads
05282976-006
Core connecting rod, 12 inches long, M2x0.4 metric threads
05282976-012
Mounting block
04560954-000
Refer to our “ Acces sorie s for LV DTs” data shee t f or our LV DT signal con dit ioni ng instrumentation and ot her ac ce ssor ies .
MHR Series – Minia t ure General Pur pos e AC LVDT
MHR Series Rev. 6 www.meas-spec.com 2015-July
5/5
TECHNICAL CONTACT INFORMATION
NORTH AMERICA
EUROPE
ASIA
Measurement Specialties, Inc.
1000 Lucas Way
Hampton, VA 23666
United States
Phone: +1-800-745-8008
Fax: +1-757-766-4297
Email: sales@meas-spec.com
Web: www.meas-spec.com
MEAS Deutschland GmbH
Hauert 13
D-44227 Dortmund
Germany
Phone: +49-(0)231-9740-0
Fax: +49-(0)231-9740-20
Email: info.de@meas-spec.com
Web: www.meas-spec.com
Measurement Specialties China Ltd.
No. 26, Langshan Road
High-tech Park (North)
Nanshan District, Shenzhen 518057
China
Phone: +86-755-33305088
Fax: +86-755-33305099
Email: info.cn@meas-spec.com
Web: www.meas-spec.com
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
manufacturer. Measurem ent Specialt ies, I nc. reserves the right to make c hanges without further not ic e to any product herein. Measurem ent
Specialti es, Inc. makes no warran ty, represent ation or guarantee re garding the suit ability of its product f or any partic ular purpos e, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different
applications. All operating parameters must be validated for each customer application by customer’s technical experts. Measurement
Specialti es, Inc. does not convey any lic ense under its patent rights nor the rights of others.
