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Edelrid OHM

Assisted-brakink resistor to increase rope friction
Edelrid OHM Edelrid OHM Farbe / color: oasis ()
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The development of the Ohm was supported by the Institute of Mechanical Handling and Logistics at the University of Stuttgart. It is an assisted-braking resistor that is attached at the first bolt with a quickdraw and the rope runs through it. In the event of a fall, the rope is pulled into the device’s braking mechanism. This then brakes the fall. The device does not stop the rope abruptly; instead it progressively brakes the speed it runs through, so that the belayer can still dynamically arrest the fall. The Ohm increases the amount of friction in the safety chain, independent of the belay device used. As a result, the belayer needs to apply significantly less hand braking force to the braking rope to arrest the fall and they wont be hurled against the wall in an uncontrolled manner.

The Ohm is designed not to affect rope handling when belaying a lead climber. It neither increases rope drag for the lead climber, nor has a negative affect when paying out rope. The device’s assisted braking mechanism is only activated in the event of a fall.

The OHM benefits both climber and belayer: The belayer wont be pulled against the wall in an uncontrolled manner. The climber can climb right to their limits, without having to worry that their belayer might not be able to hold them should they fall and with no fear of a hard landing.

Material / Details

  • Breaking load: 20 kN
  • OHM is attached at the first bolt in the safety chain
  • Lowering a heavier climber is much easier to control
  • For single ropes from 8,9 - 11 mm
  • Recommended weight difference lead climber and belayer: 10 - 40 kg
  • Minimum weight belayer: 40 kg
  • Weight: 360 g
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  • Store availability

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    • Göttingen
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