Wire linear potentiometric transducers

The PF are wire potentiometric position transducers that turn a linear motion into a resistance variation.
Special features of the PF transducers are their low cost and easy assembling.

They are made of a precision rotating potentiometer operated by a winding or unwinding stainless steel wire.
Available stroke: 50 - 100 - 200 - 300 - 500 - 700 - 900 mm
➤ Available version with analogue output ‘T’: I = 4- 20mA or V = 0- 10V
Linked together a display or an electronic positioner (for example V3P, V4P, VE6P, P3X) it supplies a simple, effective system to measure linear or angular motions on machine tools, automatic-,wood-, marble-, glassworking machinery, cylindrical-hydraulic-, pneumatic stroke, shutiers etc.
• These transducers are carried out in self-extinguishing, shock-proof plastic cases which are solvents-, petrol-, greases-, oils- proof.



1. Coupling screw
2. Fixing bores

Versions L*
PF50 46
PF100 46
PF200 46
PF300 46
PF500 55
PF700 55
PF900 55



Weight 180 gr
Colour Grey RAL 7004
Electric connection Cable length 2, 5, 10 meters
Electromagnetic compatibility - EMC 2014/30/EU
Linearity ± 0,25%
Max. speed 0,5 m/s
Number of cycles PF50-PF100-PF200: 500 000
PF300-PF500: 400 000
PF700-PF900: 250 000
Protection degree IP54
Relative humidity 10 ÷ 90 %
Resistance 10 KOhm
Wire strength max ∼ 2,4 N
Working temperature -10 ÷ 70°C


Versions PF50     PF100 PF200 PF300 PF500 PF700 PF900
Nominal stroke 0-50mm 0-100mm 0-200mm 0-300mm 0-500mm 0-700mm 0-900mm
Availabe stroke 60mm 101mm  220mm  360mm  508mm  730mm  930mm 
Resistance 10KΩ±10%  10KΩ±10%  10KΩ±10%  10KΩ±10%  10KΩ±10%  10KΩ±10%  10KΩ±10% 
Power 1 W  1 W  1 W  1 W  1 W  1 W  1 W 
Linearity ±0,25%  ±0,25%  ±0,25%  ±0,25%  ±0,25%  ±0,25%  ±0,25% 
Reading V3P-V4P
(8000 points max.) 
±60,0  ±101,00  -199,9+220,0 -199,9+360,0  -199,9+508,0  -199,9+730,0  -199,9+1010
Reading VE6P 
(64000 points max.)
±60,0  ±101,00  ±220,00  ±360,00  ±508,00 ±730,00 ±1010,00 

The P_X positioning units serie are programmable microprocessor single-axis positioner with relay or analogue outputs that processes signals supplied by incremental transducers such as encoders, optical lines, and magnetic band.
The opportunity to create customized working programmes makes them extremely versatile (cutting machines, bending machines, etc.). In order to optimise the accuracy of positioning there are the possibility to enter some parameters that are able to counterbalance system inertia, clearances, and wear of mechanical couplings. Positioning is managed through the Start/Stop, Onward/Backward, Slow/Quick, End of Positioning relay outputs. A voltage analogue output is also available that may be set up as -10 +10V or 0+10V as well as the 4÷20mA current output for the control of inverters or actuators. All of the positioner inputs Start, Emergency, Preset, Piece-counter, and counting inputs are optoinsulated.
➤ Other features: automatic/semiautomatic, manual, absolute/line working mode, memorization of 99 positioning dimensions with the possibility of programming the number of pieces to be worked in sequence and the number of cycle repetitions; test function to check inputs and outputs; RS232 or RS485 MODBUS RTU serial connection.
• P1X: the 16-key keypad and 8 operation indicators make operating and setup of the positioners user-friendly.
• P2X: programming is done very easily by four keys on the front panel; an auxiliary display allows a two character-driven programming in addition to displaying parameters during processing.
• P3X: processes signals provided by potentiometric position transducers linear or rotary. The 16-key keyboard with 6 operation indicators make it simple and easy to use and the setup of the positioner.

The instruments of the V_P series are multifunction microprocessor display units with input from potentiometric transducer that are particularly indicated for the measurement of linear and angular dimensions.
The carrying out with microprocessor and the use of modern analogue-to-digital conversion techniques enable to obtain excellent performances in terms of calibration easiness, resolution, stability, conversion speed, and cost by enabling the implementation of some functions of interest for the industrial applications: absolute/relative dimension, tool diameter compensation, etc.. The instrument set-up and calibration operations are easily carried out with the four keys positioned on the front panel. Through self-learning calibration it is possible to adapt the input variable amplitude to the wished reading scale.
• V3P: the measured dimension may be compared with 3 intervention thresholds that may be set for the enabling of as many relays, the status of which is displayed through a led.
Versions: V3P- displayed, V3P-3 displayed with 3 intervention ON/OFF.
• V4P: the measured value can be compared with 2 or 3 alarms settable for enabling many relays whose status is displayed by LEDs. Two analog outputs, a voltage 0-10V or -10 to +10 V, the other 4 ÷ 20mA 12-bit resolution, and its possible to configure the instrument and check its status via serial interface RS485 with MODBUS RTU protocol.
Versions: V4P- displayed; V4P-2 interventions with 2 relay changeover; V4P-3 with 3 interventions relay ON/OFF; V4P-T with analog output voltage and current; V4P-2T with 2 interventions and analog output voltage and current; V4P-RS485 with serial output RS485 protocol MODBUS; V4P-2RS485 with 2 interventions relay and RS485 serial output.

The P Interface turns the signal supplied by a potentiometric transducer into current 0-20 mA, 4-20 mA or voltage 0-10Vdc.
Its typical employment is the current or voltage transmission of signals supplied by a remote potentiometric transducer to remote supervision systems.
Special features of the P interface are its low cost and simple setting: activating two trimmers it’s possible to refer the entire output range to the stroke of the poten-tiometer effectivly employed.
The instrument is carried out in a 3-module case for assembling on DIN EN50022 guide.


INTP0 Power supply 115Vac
INTP1 Power supply 230Vac
INTP2 Power supply 24Vac
INTP3 Power supply 24Vdc


Input impedance 1 Mohm
Linearity endless
Max. load impedance for current output 600 Ohm
Min. load impedance for voltage output 1Kohm
Output resolution 12 Bit
Outputs 0÷10 Vdc; 4÷20mA; 0÷20mA
Potentiometer input 1÷50 Kohm
Power supply 115Vac, 230Vac, 24Vac, 24Vdc 3VA
Relative humidity 10 ÷ 90 %
Working temperature ÷50°C
Electromagnetic compatibility - EMC 2014/30/EU



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PF50/900 IT  EN 
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