Gefran PMI12 Data Sheet

PMI12

RECTILINEAR DISPLACEMENT TRANSDUCER
WITH MAGNETIC DRAG

Main characteristics

• The PMI-12 transducer is designed for use inside oil­pressure cylinders, applications that demand high
strength.

• The AISI316 stainless steel body and elevated protection
level permit installation in cylinders with pressures up to
250 bar (400 bar peak).

• Available with internal flanges or external threads to gua­rantee mechanical compatibility with all principal cylinder
types.

• Patented

TECHNICAL DATA

Useful electical stroke (C.E.U.) 50 to 1000 mm

Independent linearity
(within C.E.U.)

Resolution Infinite

Repeatibility ≤ 0.08 mm

Electrical connection 1 mt. 3-pole shielded cable

Displacement speed

Max. acceleration

Cursor dragging force ≤ 0.5 N

Vibrations 5...2000 Hz, Amax = 0.75 mm

Shock 50 g, 11 ms

Displacement sensitivity
(no hysteresis)

Tracking error see table

Tolerance on resistance ± 20%

Recommended cursor current < 0.1 µA

Maximum cursor current in
case of bad performances

Maximum applicable voltage see table

Electrical isolation > 100 MΩ at 500 V = 1 bar, 2 s

Dielectric strength < 100 µA at 500 V~ 50 Hz,

Dissipation at 40°C
(0 W at 120°C)

Thermal coefficient of resistance -200...+200 ppm/°C typical

Actual Temperature coefficient
of the output voltage

Working temperature -30...+100°C

Storage temperature -50...+120°C

Material for transducer case Steel AISI 316

Important: All the data reported in the catalogue linearity and temperature
coefficients are valid for a sensor utilization as a ratiometric device with a
max current across the cursor circuit Ic ≤ 0.1 mA.

< 10m/s2 max displacement

see table

standard < 5 m/s

amax = 20 g

0.05 to 0.1 mm

10 mA

2 s, 1 bar

see table

≤ 5 ppm/°C typical

MECHANICAL DIMENSION

Version Flange (X) Std

Sealing
gasket

3 pole
cable

Case

Welding

Inside thread
M4 6 mm
deepth

Welding

SEALING

ZONE IP67

0,2 BAR

SEALING

ZONE

AT 250 BAR

Version Flangie (M)

M24x1,5 thread

Stem

MECHANICAL / ELECTRICAL DATA

MODEL

250 300 350 400 450 500 750 800 850 900 950 100050 100 150 200 550 600 650 700

Useful electrical stroke
(C.E.U.) + 1 / -0

Theoretical electrical
stroke (C.E.T.) ± 1

Resistance
( C.E.T.)

Independent linearity
(within C.E.U.)

Dissipation at 40°C
(0W at 120°C)

Max applicable
voltage

Mechanical stroke CM

Case Lenght (A)

mm

mm

kΩ

±%

W

V

mm

mm

PCUR032 CURSOR

40

0,1

Model

C.E.U. + 1

5

10 20

0,05

21

3

60

C.E.U. + 5

C.E.U. + 97

STANDARD FLANGE (X) THREADED FLANGE (M)

Welding

Stem

Stem

N° 4 Holes ø 4.1

Welding

INSTALLATION INSIDE THE CYLINDER

Flange Version (X) thread M24x1,5

O-Ring recommended

PARKER 2-117 20,29x2,62

Material NBR 90 Shore-A

Compound PARKER N552-90

O-ring surface must be free of
spiral or longitudinal scratches

Ro 1,6μm for O-rings with NOT
PULSING pressure Ro 0,8μm for

O-rings with PULSING pressure

O-Ring recommended PARKER
2-117 20,29x2,62
Material NBR 90 Shore-A
Compound PARKER N552-90