Blatchford PDAC Approved Products »


Suitable for outdoor use
PDAC Approved
Activity Level 3

Orion3 is a microprocessor knee that is suitable for K2 to K4 walkers who would benefit from stability on different terrains, slopes and steps and for those wishing to walk naturally and efficiently at either single or varying speeds.

The safety and stability of Orion3 encourages users to evenly distribute their weight, offloading their sound side and lower back to reduce aches and pains commonly reported by amputees.

Key Features

  • Situational Awareness – an Inertial Measurement Unit senses movement and speed to respond accordingly, in real time
  • Enhanced Stability Performance – 5 levels of stance resistance optimises safety at all times

– Controlled Stance Support
– Standing Support
– Dynamic Slope and Stair Descent
– Stumble Recovery
– Supported Sitting

  • Natural Efficient Motion – MPC pneumatics ensure energy efficient and smooth swing at multiple speeds

– Optimal Stance Release
– Adaptive Speed Control
– Terminal Swing Damping

  • Cycling Mode and Fixed Angle Flexion Lock Mode
  • Knee Flexion to 130°
  • Intuitive Programming Software via PC or App
  • Lithium Ion batteries with up to 3 days life, dependent on usage
  • Magnetic charger for simple recharging
  • Battery Life Indicator and Low Power Mode
  • New! Magnetic Charger

Enhanced Stability Performance

Enhanced Stability Performance (ESP) increases the user’s confidence and independence, reducing the risk of stumbles or falls and ensuring more balanced limb loading for greater long term health and protection.

ESP adapts hydraulic resistance in real time, providing optimal stance support whether walking in a crowded environment, on uneven terrain, slopes, steps and now also when standing. With situational awareness, Orion3 continuously monitors the user’s activity and responds accordingly for greater safety.

Orion3 Controlled Stance Support

Controlled Stance Support

Supportive resistance throughout stance phase provides optimal stability for walking with greater safety and less effort on all-terrain.

Orion3 Standing Support

Standing Support

Maximum resistance stabilises knee, on both flat and slopes, encouraging better posture and balanced loading to relieve pressure on sound limb and lower back.

Orion3 Stumble Recovery

Stumble Recovery

Stance resistance engages during swing phase extension to ensure knee stability should the user stumble.

Orion3 Stair Descent

Dynamic Slope & Stair Descent

Knee resistance progressively increases with immediate support on the first step and increasing support with further knee flexion for enhanced control and safety when descending stairs or slopes.

Orion3 Supported Sitting

Supported Sitting

Progressive hydraulic resistance ensures greater support and control to sit down with safety and confidence and more balanced loading across both limbs.

Natural Efficient Motion

Knee flexion during swing phase varies according to walking speed. With microprocessor pneumatic swing control, Orion3 controls heel rise across a range of walking speeds for a more natural swing. The pneumatic spring also makes it easier to initiate swing, saving energy with every step and ensuring more natural knee flexion at lower speeds.

*Studies have shown the reduced physiological cost of walking, with reduction in energy expenditure by up to 20% – please refer to our clinical compendium for further details.

Real Life Stories

Chris & Denise’s Story

Becky’s Story


Smart Programming App

DownloadAppStoreProgramming Orion3 just got faster and simpler with the new Orion3 Programming App for clinicians available on iOS. With its simple to follow automated smart programming, you can complete limb set up with fewer steps whilst still having access to more advanced fine tuning if required. 

This app is for clinicians who have completed a Blatchford approved training course and requires an authorisation code:

  1. Download the app from the App Store, search for “Orion3”.
    If using an iPad please choose “iPhone Only” when searching.
  2. On first use, send the 8 digit “Authorisation Request Code” to your Blatchford representative.
  3. Enter the 12 digit code provided by your Blatchford representative into the app.
  4. Start programming Orion3!

For support questions please contact Blatchford Technical Support at

* Compatible with all models of iPad, iPhone and iPod Touch running iOS v9 or later.

Orion3 Technical Data

Max. User Weight:


Activity Level:


Component Weight:


Build Height:


Control Unit:

MPK Hydraulic/Pneumatic

*Dependent on local reimbursement guidelines/maximum user weight 100kg


Battery Charger Kit 239093
Clinician’s Manual 938374
Programming Tablet 019179
Charger Extension Cable 239098
Cosmetic Cover 561101BLACK

Proximal Attachments (ordered separately)

Rotating Pyramid with Shift 239017
Non-rotating Pyramid with Shift 239089
Rotating Female Pyramid with Shift 189128
M36 Threaded Adapter 239092

Socket Adapters 




Part Number: ORION3