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AML / Dual-Range Rotary Torque Sensor | DRDL
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AML / Brushless Rotary Square Drive Torque Sensor | DRFN

  • Capacities: 0-1Nm to 0-5000Nm
  • ±5Vdc Output
  • Non-Linearity: <±0.15%/Rated Capacity
  • Optional Pulsed Angle Output
  • Max Speed: 7000 to 12,000rpm (depending on capacity)
  • Maintenance Free Thanks to its Non-Contact Technology
  • Ideal for Automotive Industry, Test Benches, Assembly Applications & Pulsed Tools
  • High Accuracy Guaranteed – Uses Proven Strain Gauge Technology
  • Optimum Performance Delivered – Its Integrated Signal Amplifier Reduces Signal Interference  
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Brushless Rotary Square Drive Torque Sensor | DRFN

The DRFN series of brushless non-contact torque sensors manufactured by ETH Messtechnik in Germany provide accurate torque measurement in continuously rotating applications at speeds up to 12,000rpm and has a square drive type mechanical connection.

The DRFN features integral signal conditioning gives a ±5Vdc analogue signal.  A 360 pulses/revolution angle output is optional on all capacities.

The DRFN brushless square drive torque sensor offers excellent accuracy making it suitable for many manufacturing, assembly and test bench applications.

Technical Specifications

Product Dimensions

DRFN Brushless Square Drive Torque Sensor Outline Drawing

Version without Angle Output

Capacity (Nm)
Square Drive
A
B
C
D
E
F
1, 2, 5, 10, 12, 15, 20
 1⁄4«
62
32
56
16
77
8
20, 30, 50, 63
 3⁄8«
62
24
52
16
82
12
100, 160, 200
 1⁄2«
66
40
57
20
95
16
200, 300, 500
 3⁄4«
66
46
65
23
110
24
1000, 2000
1″
66
52
71
23
127
31
2000, 3000, 4000, 5000
 11⁄2«
86
92
108
46
178
44

Version with Angle Output

Capacity (Nm)
Square Drive
A
B
C
D
E
F
1, 2, 5, 10, 12, 15, 20
 1⁄4«
66
32
51
16
82
9
20, 30, 50, 63
 3⁄8«
66
40
59
20
90
12
100, 160, 200
 1⁄2«
66
40
59
20
97
16
200, 300, 500
 3⁄4«
71
55
74
27.5
117
24
1000, 2000
1″
72
56
73
28
132
30.5
2000, 3000, 4000, 5000
 11⁄2«
86
92
108
46
178
44

All dimensions are in mm.

Wiring Details – AK12.4 Cable Assembly

Pin Colour Designation for DRVL Torque Transducer
A Green Torque Output Signal: Frequency 10kHz ±5kHz
B Red / Blue Angle Output: Track A = 0°
c Yellow Torque Output Signal: ±10Vdc
D White Torque Output GND/0V (note: can be connected to supply GND / Pin E)
E Grey Supply GND/0V & Angle/Speed Output GND/0V
F Pink Supply: 12Vdc ±10%
G Grey / Pink Speed/Angle Output: Track B = 90°
H Purple Memory Chip (factory use only)
J Black Sensor Health Check Signal (factory use only)
K Red Control Input (factory use only)
L Brown Torque Output Signal: Frequency 10kHz ±5kHz (inverted)
M Blue External Voltage Reference Input for Speed/Angle Signal (optional)
Screen Connect cable screen to earth

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