LVDT Displacement Sensors

7/28/2019 LVDT Displacement Sensors

1/8

MICRO-EPSILON

SENSORS & SYSTEMSSENSORS & SYSTEMS

Authority in Displacement Measurement

LVDT-Sensors

trans SENSOR

Inductive DisplacementSensors and LinearGaging Sensors


2/8

transSENSOR

LVDT-Principle

Inductive displacement sensors using theLVDT-principle ( inear ariable ifferential

ransformer) consist of a primary and two

secondary coils with a common movable

magnetic core. An oscillator electronics

excites the primary coil with an alternating

current of constant frequency. Consequently

alternating currents are induced in both

secondary coils with amplitudes depending

on the core position. A displacement of the

core yields a higher voltage in onesecondary coil and a lower voltage in the

opposite coil. The difference between both

secondary voltages is proportional to the

displacement.

L V D

T

Gaging sensors

Displacement sensors

have a guided plunger. The

probe is pushed against the target surface

by a spring.

work with a free

moving plunger without any mechanicalcontact to the sensor body. The plunger is

fixed onto the target by a mounting thread.

linear range

- signal

100 %+ displacement

- displacement100 %

+ signal

D AT

Options

Options for gaging sensorsPneumatic push

Waterproof housing

(welded/sealed up to 5 bars)

W

V

PrincipleDifferential

Transformer(LVDT)

Measuring rangein mm

DT

Excitation AC A

FunctionDisplacementsensorGaging sensor

D

G

Linearity 0.5 % 0.3 % 0.15 %

5

31.5

Electrical connectionsAxialStranded wire (0.3 m)Integral cable (3 m)Plug connectionSolder pins

LACASATA

RadialIntegral cable (3 m)Plug connection

CRSR

Pressure resistant sensor(up to 100 bars)Standard mounting flangeHigh temperature sensor up to 200 Cwith integral teflon cablel (for sensors with-CR/-CA connections only)

P

FH

secondary coils probeslidebearing

magneticcore

primary coil spring

Gaging Sensor

Secondary coils plunger

magneticcore

primary coil Core extension

Displacement Sensor


3/8


4/8

transSENSOR

LVDT Displacement Sensors

4

Sensor Dimensions

1) Plunger in zero position (10 % of measuring range 1 mm)

in mm, not to scale

Basic model

Connection TA CA SA TA CA SA TA CA SA TA CA SA

Length of housing L mm 30 40 40 47 57 57 63 73 73 78 87 87

Housing diameter mm

Length of plunger l 1 inzeroposition

mm 19 29

10

DTA-1D- o - DTA-3D-o - DTA-5D-o - DTA-10D-o -

30 35

Housing dimensions for displacement sensors up to 10 mm measuring range

Displacement sensors work with a free moving plunger without any mechanicalcontact to the sensor body. The plunger has to be fixed onto the target by a

mounting thread. The measuring principle within the sensor is without contact

and thus wear-free.

Displacement sensors are mainly used for measurement and monitoring of

movement, displacement, position, stroke, deflection, transposition, etc. in

machines, vehicles and systems.

Displacement sensor type - SA with axial plug connexion

Option SA: axial connectionsame dimensions for all modells

Option SR: radial connectionsame dimensions for all modells

Displacement sensor type - TA with axial solder pins

Displacement sensor type - CA with integral cable

L l10

M2

2

1 0

lL13

10

2

1 0

M2

l9

32

11,5

9

26

22

10

M2

2 1 0

14


5/8

MICRO-EPSILON

5

L l

20

M4

4 2 0

Displacement sensor type - LA with axial stranded wire

L17

Type - CA with integral cable

L9

Type - SAwith axial plug connection

L

1 5

Type - CR mitwith integral cable (radial)

L

9 , 5

Type - SR mitradial plug connection


Basic model

Connection LA CA CR SA SR LA CA CR SA SR

Length of housing L mm 92,5 129,5

Housing diameter mm 20

51 62Length of plug l1 in

zero positionmm

DTA-15D- o - DTA-25D- o -

106,5 143,5

Housing dimensions for displacement sensors with 15 and 25 mm measuring range

f e a t u r e smeasuring range 1 25 mm

precision in harsh environment

wear free and maintainance free

simple to operate/install


6/8

transSENSOR

LVDT Gaging sensors

6

l

StandardOption

FSO = Full scale output

Technical data:

Operating temperature: -20 C to +80 C (-4 to +176 F)Storage temperature: -40 C to +80 C (-40 to 176 F)

Temperature stability: zero 0.003 % FSO/C / sensitivity 0.01 %/

Sensor housing: Stainless steel and magnetic shielding

Protection class: Gaging sensor type SA IP 40Gaging sensor type CA IP 54

Min. bend radius: 20 mm

1) with mating connector IP 542) with mating connector IP 67

0.0017 % FSO/FC / 0.005 % /F

cable

Cable outside diameter: 4.6 mm

1

2

Gaging sensor models are equipped with a plunger gliding in asliding-bearing. The probe is pushed against the target surface

by means of a spring. The probe is mounted onto the plunger

via a standard M2.5 thread. It can be easily exchanged with

any other probe model.

Gaging sensors are mainly used for dimensional inspection

(length, width, diameter, thickness, depth, height, etc.).

Basic model

Connection CA SA CA SA CA SA CA SA

Linear range

0.5% FSO l l l l l l l l

0.3% FSO

0.15% FSO

repeatability

Excitation frequency

Excitation amplitude

Sensitivity

Spring constantTemperature range Available options

Force in midrange(typical)

1 mm 3 mm

1.00 N


7/8

MICRO-EPSILON

Sensor dimensions


Housing dimensions for gauging sensors up to 10 mm measuring range

in mm, not to scale

Basic model

Connection CA SA Opt. V CA SA Opt. V CA SA Opt. V CA SA Opt. VLength of housing L mm 67 67 69 89 89 92,1 108 108 120 135 135 145

Length c lamping cylinder L 1 mm 21 21 19 26 26 25,1 30 30 38 42 42 46

Length of plunger l 1 mm 9,5 9,5 10 12,5 12,5 12,7 14 14 17,5 20 20 22,2

Housing diameter mm

Clamping cylinder diameter mm

10

8h6

DTA-1G- o - DTA-3G-o - DTA-5G-o - DTA-10G- o -

f e a t u r e smeasuring range 1 ... 10 mm

high repeatability

option: pneumatic push

simple to operate/install

Gauging sensor typ - SA with axial connection

Option V Pneumatic Push with axial connection

l9

L

8 h 6

1 0

1

Gauging sensor type - CA with integral cable

lL13

L

8 h 6

1 0

1

Clamping cylinder 8 Clamping cylinder 8

Clamping cylinder 8

L9

L

3,5

8

8 h 6

1 0

1

Insidediameterhose 2


8/8

MICRO-EPSILON

p l u n g e r

m a g n e t i c c o r e

p r i m a r y c o i l

s e c o n d a r y c o i l s

LVDT-Sensor

MICRO-EPSILON

trans CONSENSOR CONTROLLER

Power Signal

Miniature Sensor Controller MSC 710

The MSC 710 is a single-channel miniature

sensor controller for the operation of

inductive displacement sensors based on

the LVDT principle (Linear Variable

Differential Transformer). Its compact, but

rugged design, makes it suitable for both

industrial and laboratory applications.

Easily accessible and simple to operate, by

using DIP-switches. The electronic unit can

be matched to a wide range of sensors. Miniature Sensor Controller MSC 710

Modifications reserved / Y9761127-A010121MLO

MICRO-EPSILON MESSTECHNIK

GmbH & Co. KG

MICRO-EPSILON

Koenigbacher Strasse 15D-94496 Ortenburg / Germany

Phone: +49/85 42/1 68-0 Fax: +49/85 42/1 68 90

e-mail: [email protected]

www.micro-epsilon.com

3200 Glen Royal Road, Suite 110

Raleigh, NC 27617-7419 / USA

Phone: +1/9 19/7 87-97 07 Fax: +1/9 19/7 87-97 06

e-mail: [email protected]

www.micro-epsilon.com

Certified acc. to DIN EN ISO 9001: 1994

f e a t u r e sExcellent linearity and resolution

Frequency response 300 Hz

Zero and gain adjustable coarse/fine

Compact and robust EMI-proofed housing

Output signal 2 ... 10 VDC / 4 ... 20 mA

Supply voltage 24 VDC

Excitation frequency 1 ... 5 kHz (selectable)

LVDT Displacement Sensors

Documents

Transcript of LVDT Displacement Sensors