Line distance transducer - way of operation, review of available types
  • Line distance transducer - way of operation, review of available types

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Manufacturer: Celesco

Line distance transducer - way of operation, review of available types

A Cable-Extension Transducer, sometimes also known as a string pot, a draw wire senor, a string encoder or a yo yo pot, is a device used to detect and measure linear position and velocity using a flexible cable and a spring-loaded spool.

Simply mount the transducer's body to a fixed surface and attach the stainless steel cable to the movable object. As the object moves, the transducer produces an electrical signal that is proportaional to the cable's linear extension or velocity. This signal can then be sent to a display, a PLC or data aquisition system

Cable-Exension Tranducers (CETs) are composed of four main parts:
  1. Measuring Cable
  2. Spool
  3. Spring
  4. Rotational Sensor

Measuring the movement and position of objects is easy with CETs.

CETs can be installed in minutes, fitted into prcarous or tight areas and they do not require perfectly parallel alignment. They also offer great flexibility, a small size to measurement ratio and they cost less than rod or wand-type measurement devices.

CETs can be used in a wide variety of applications including industrial factory automation, high-tech medical devices, structural and automotive testing, die-casting or injection molding, hydraulic cylinder control or just about anything else you can think of...

 
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Celesco offers all industry-standard output signals, these include:

  • Potentiometric (Voltage Divider)
  • 0...10 Volts DC
  • 4...20 mA (2-wire)
  • 0...20 mA (3-wire)
  • Incremental Encoder (Quadrature)
  • Absolute Encoder (ask factory)
  • RS232/RS422 Communications
  • DeviceNET®
  • CANbus J1939

Measuring the movement and position of objects is easy with CETs.

CETs can be installed in minutes, fitted into prcarous or tight areas and they do not require perfectly parallel alignment. They also offer great flexibility, a small size to measurement ratio and they cost less than rod or wand-type measurement devices.

CETs can be used in a wide variety of applications including industrial factory automation, high-tech medical devices, structural and automotive testing, die-casting or injection molding, hydraulic cylinder control or just about anything else you can think of...

Group MTAMT2SPPT1SZG65PT100

Compact group (DO 2500 mm)

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Technical data

Measurement range  [mm] 125 750 1250 1250 1250 2500
Accuracy 0,15% 0,25...0,02% 1,00...0,25% 0,28...0,02% 0,02% 0,28...0,02%
Repeatability 0,02% 0,02% 0,05% 0,05...0,02% 0,02% 0,05...0,02%
 

Technical data

Casing material Anode Aluminium Anode Aluminium Plastic
(polycarbonate)
Anode Aluminium
/ABS
Anode Aluminium Anode Aluminium
Protection level IP65 IP50 IP50 IP65...67
depends on execution
IP65 IP50

Casing

Noble steel covered with nylon -
Noble steel - - - - - -
Thermoelastic plastic - - - - - -
 

Measurement cord

Potentiometer -
Tachometer - - - - - -
0...10VDC - - - -
4-20 mA - - -