Русская версия
  • Sensors >
  • Absolute Linear Position Sensors
  • Country*:
  • Name*:
  • Company*:
  • E-mail*:
  • Confirm your e-mail*:
  • Phone number:
  • Message*:

* - Required

Send

Absolute Linear Position Sensors

Absolute Linear Position Sensors (Absolute Linear Encoders) are designed for measuring and checking displacements, dimensions, run-outs, surface profiles and deformations of engineered objects.
 

Riftek’s absolute linear encoder series includes two models:

RF251 for hard industrial environments and

RF256 sensors with a built-in display option for laboratory environments.

Get PricingInquires
Models
  • RF251 Series

    RF251 Series

     

      Measuring range, mm: 3 and 25
    Accuracy, µm: ±1

    Resolution, µm:

    0,1; 0,5 and 1
    • wide temperature range
    • IP57

     

     

    See detailed specifications →
  • RF256 Series

    RF256 Series

     

      Measuring range, mm: 15, 35 and 55
    Accuracy, µm: ±1
    Resolution, µm: 0,1; 0,5 and 1
    • built display option
    • batteries powered

     

     

    See detailed specifications →
Specifiactions

Absolute Linear Position Sensors RF25x Series. Specification

Model
RF251-3
RF251-25
RF256-15
RF256-35
RF256-55
Measurement range, mm
3
25
15
35
55
Accuracy (at Т=20 °С), um
± 2
± 3
Resolution, um
0,1  or  0,5 or  1 or 5 or 10
Output interface digital
RS422
(RS485 and SSI or RS232) and (EncD5 or EncD10 – emulation of quadrature signals of incremental transducers)
analog
no
0…20 mА (<500 Om load) or 0…10 V
Synchronization input
no
opto-isolated
Logical outputs
no
two outputs, NPN: 100 mA max; 40 V max
Indication
no
two-color LED (red/green)
Power supply, V
12 (without analogue output) 15 (with analogue output)
Power consumption, W
0,75
Enclosure rating
IP57
IP50
Operating temperature, °С
-40…+50
-10…+50
Weight (without cable), g
110
110
150
180

 

Operation

Operation of the sensors is based on the principle of photoelectric scanning of special scale, connected with a measurement tip of the sensor. Radiation of a LED 1 is collimated by a lens 2 and is directed on a scale 3. The image of area of the scale is examined by CMOS array 4 and is analyzed by signal processor which calculates position of the scale.

As compared with incremental sensors, absolute sensors have a number of advantages: the absolute position of the gauge plug is determined immediately after power is on and the necessity of search of the reference mark is excluded. 

Also excluded is the probability of accumulation or loss of count pulse signals in case of  impacts, vibrations and reverse motion.

 

 

Applications

High precision contact measurements:

  • Parts Dimensions 
  • Width Measurements
  • Object and Target Displacements
  • Runout
  • Flatness
  • Object Deformation
Video

Absolute contact sensor RF25

Order info
Model
Measurement range, mm
Resolution, um
Type of the serial interface
Period of quadrature signal, EncD5 – 5 um, EncD10 – 10 um
Synchronization mode (IN or SSI)
Attribute showing the presence of Current Loop (I) or Voltage (U) output
Attribute showing the presence of 2 logical outputs
Cable length, m

 


 

Search

 

Site sections

More links

© 2001 – 2018 RIFTEK LLC

Logoisky tract, 22, Minsk, Republic of Belarus

Tel/fax:  +375 (17) 281-35-13
              +375 (17) 281-36- 57

Mobile:   +375 (29) 655-72-55

E-mail: info@riftek.com

Our partners in other countries

  • Country*:
  • Name*:
  • Company*:
  • E-mail*:
  • Confirm your e-mail*:
  • Phone number:
  • Message*:

* - Required

Send