Lenord+Bauer Finding Solutions. Founding Trust.

Incremental bearing-free rotary encoder – GEL 2478

1-/2-channel Hall effect rotational speed and position sensor with ATEX certification

  • Maintenance and wear-free rotational speed and position sensor using magnetic scanning
  • Scanning of measuring scale (for example, ferromagnetic target wheels or piston rods)
  • Reliable detection of high speeds to creeping (0 Hz to 20 kHz)
  • Robust and compact stainless steel housing for use in harsh and confined applications
  • ATEX certification for use in potentially explosive atmospheres
Inquiry & Support

Technical information

Properties

  • ATEX certification for use in potentially explosive atmospheres
  • Incremental measuring 1-/2-channel speed sensor based on the magnetic sensing principle
  • Contactless measurement of rotary or linear movements
  • Extremely robust stainless steel housing with a sensor tube diameter of 22 mm
  • Target wheel with module 1.0 to 3.5 or measuring rod with 4.0 mm pitch as measuring scale
  • High EMC immunity for interference-free signal transmission in challenging industrial environments
  • Highest product quality with optional certification according to DNV and many other standards

Advantages

  • Optimized lifecycle cost
  • Maintenance and wear-free
  • ATEX approval
  • Compact and extremely robust design
  • Simple integration
  • Easy to assemble
  • High signal quality
  • Suitable for safety applications

Downloads

Downloads

Product Document Languages
GEL 2478 Technical information DE EN
Product information* DE/EN

Registration required

Field of application

  • Rotational speed measurement at gears, gear wheels and rollers
  • Position measurement at piston rod
  • Rotational speed and position detection in potentially explosive atmospheres

Dimensional drawings

All dimensions in mm [inch]

Technical data

Display of signal patterns

Signal pattern E-

1 channel

Signal pattern F-

1 channel with inverse signals

Signal pattern V-

2 channels, 90° phase offset

Signal pattern X-

2 channels, 90° phase offset, with inverse channels

Electrical data

Supply voltage UB (reverse polarity protected)

10 to 28 V DC with ATEX
10 to 30 V DC without ATEX

Current consumption IB (without load)

≤ 45 mA

Output signal (short-circuit-proof)

Square-wave signals

Output signal level High

≥ UB - 1.8 V

Output signal level Low

≤ 0.5 V

Output current per channel

≤ 10 mA

Frequency range

0 to 20 kHz

Duty cycle

50% ± 10%

Phase offset

typ. 90°

Slew rate (2 m cable)

≥ 10 V/μs

Electromagnetic compatibility

Rail vehicles (EN 50121-3-2)
Industrial applications (EN 61000-6-1 to 6-4)

Dielectric strength

500 V AC (EN 61439-1)

Mechanical data

Module m target wheel

1.00 to 3.50

Permissible air gap (for Module m / Pitch p)

See air gap table

Target wheel width

≥ 10 mm (smaller upon request)

Target wheel tooth form

Involute gear teeth as per DIN 867, square gear teeth 1:1 or
slotted disk (upon request)

Target wheel material

Ferromagnetic steel

Working and operating temperature

-40 °C to +85 °C with ATEX
-40 °C to +120 °C without ATEX

Storage temperature

-40 °C to +120 °C

Degree of protection

IP 68

Vibration resistance

50 m/s2 (EN 60068-2-6)

Shock resistance

100 m/s2 (EN 60068-2-27)

Housing material sensor

Stainless steel (1.4305)

Weight sensor (2 m cable, without mating connector)

approx. 500 g

Resistance

< 5 bar (sensor tube completely closed up to the flange)

 

Electrical connection
Connection PUR or silicone cable, screen connected to the housing on the encoder side
Maximum cable length ≤ 100 m
Cable LK10691
Cable material PUR sheath, halogen-free and screened
Cable diameter 8.1 ± 0.3 mm
Cable cross section 6 × 1.0 mm2
Bending radius static/dynamic 24 mm / 41 mm
Cable LK10581
Cable material Silicone sheath, halogen-free and screened
Cable diameter 9.2 ± 0.4 mm
Cable cross section 6 × 0.75 mm2
Bending radius static/dynamic 69 mm / 138 mm