Gefran RK-5 Data Sheet
RK-5
CONTACTLESS MAGNETOSTRICTIVE LINEAR POSITION
TRANSDUCER WITH FLANGED CONNECTION
Linear position transducer with GEFRAN’S innovative
ONDA magnetostrictive technology for long life.
The absence of electrical contact on the cursor eliminates
wearing and guarantees almost unlimited life.
Gefran’s patented ONDA technology achieves a compact, modular structure for simple installation.
RK-5 is a magnetostrictive position transdu-cer with flanged connection that installs completely inside oil-pressure
cylinders.
Its unique design, plus a wide range of cursor configurations, ensures easy installation and total compatibility with
cylinder manufacturer speci-fications.
Working temperature from -40 to +105°C, working pressures up to 350 bar, high resistance to vibration (25 g)
and shock (100g) give the sensor the indispensable
strength needed for heavy-duty use (for example: mobile
hydraulics).
High performance in terms of transduction of measurement defined as linearity, hystersis and repeatability.
The signal is analog in models with current or voltage
output
(ANALOG OUTPUT)
TECHNICAL DATA
Model
from 50 to 2500 mm
Measurement given
Displacement
Sampling time (typical)
1 ms
Shock test DIN IEC68T2-27
100g - 11ms - single shock
Vibrations DIN IEC68T2-6
25g / 10...2000Hz
Displacement speed
≤ 10 m/s
Maximum acceleration
≤ 100 m/s
Resolution
12 bit (min 50 µm)
Working pressure
350 bar
Nominal power supply
10....32 Vdc( E/R)
8...32Vdc (N/O/K/I outputs)
Max. power ripple
1Vpp
Output signal
0,5...9,5Vdc (RK-5 N)
9,5...0,5Vdc (RK-5 O)
0,5...4,5Vdc (RK-5 K)
4,5...0,5Vdc (RK-5 I)
4...20mA (RK-5 E)
20...4mA (RK-5 R)
Electrical insulation
500V (*) (D.C. Power supply/ground)
Protection against polarity inversion
Yes
Protection against overvoltage
Yes
Hydraulic circuit area protection
IP67/ IP69 with connector
Working temperature
-40°…+105°C
Storage temperature
-30°…+100°C
Coefficient of temperature
0.01% FS / °C
Humidity dew point EN60068-2-30
90% non-condensing humidity
2
displacement
(*) Uses 50V 2J Voltage suppressor
59
MECHANICAL DIMENSIONS
Stroke 50 to 1000 mm
Stroke 1250 to 2500 mm
SENSOR HOUSING (detail of head)
60
INSTALLATION AND CURSOR KIT (to be ordered separately)
PKIT528
PKIT529
PKIT525
“E”
Magnet
ø 25,4 x ø 13,5 x 8mm
“G”
Magnet
ø 33 x ø 13,5 x 8mm
“A”
Plastic spacer
ø 17 x ø 13,5 x 2mm
“F”
Plastic spacer
ø 25,2 x ø 13,5 x 5mm
“H”
Plastic spacer
ø 32 x ø 13,5 x 3,2mm
“B”
Magnet
ø 17 x ø 13,5 x 4mm
INSTALLATION AND CURSOR KIT FOR 13mm HOUSINGS (to be ordered separately)
Plastic spacer
ø 17 x ø 13,5 x 2mm
PKIT526
Plastic spacer
ø 17 x ø 13,5 x 2mm
PKIT527
Magnet
ø 17 x ø 13,5 x 4mm
Magnet
ø 17 x ø 13,5 x 4mm
Plastic spacer
ø 17x ø 13.5 x 7mm
Spacer INOX AISI420
ø 17 x ø 13,5 x 7mm
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