Kinvent K-Grip User manual

K- SENSORS User Manual
K-Sensors User Manual
K-Grip
K-Bubble
K-Push
K-Pull
K-Force Plates
K-Deltas
K-Move
K-Deltas XL
2© 2022 KINVENT Biomecanique E2022C_EN

K- SENSORS User Manual
K-Physio app
Kinvent Physio is the only app you will need for all your Kinvent Sensors. All tutorials for
the invent Physio app are available online at: Kinvent.link/quickstart
3© 2022 KINVENT Biomecanique E2022C_EN

K- SENSORS User Manual
This manual concerns K-SENSORS products. The information content of this manual
belongs to KINVENT, and is provided only for the purpose of operating K-SENSORS and
software. This manual is subject to modifications. The latest version is available on
www.k-invent.com .
Manufacturer
KINVENT Biomécanique SAS
Cap omega, Rond-Point Benjamin Franklin,
34000 Montpellier, FRANCE
[phone]
[e-mail]
www.k-invent.com
Copyright KINVENT Biomécanique SAS. All rights reserved. This material may not be
reproduced by any means, physical or electronic, without prior written consent of
KINVENT Biomécanique
Revision: 12
Last revision: 2022-12-19
4© 2022 KINVENT Biomecanique E2022C_EN

K- SENSORS User Manual
Graphic Symbol
The sensors comply with electromagnetic regulations as laid out
by the Federal Communications Commission.
European Conformity
MDR 2017/ 745
IEC 60878
Direct Current IN
Recyclable Packaging Box
Keep Dry
sensor is provided nonsterile
Attention, See Instructions for use
Type B applied part - External Body only
Serial Number
Manufacturer
sensor will not work when connected to AC outlet
Class II Electrical Equipment
An ISO 15223 symbol
Indicating upper & lower temperature limits for operation,
transport, and storage
Nonionizing radiation
Do not dispose of the units in normal household waste. Dispose
products in accordance with local regulations
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K- SENSORS User Manual
Contents
K-Sensors User Manual 2
K-Physio app 3
Graphic Symbol 5
Contents 6
Introduction 8
About us 9
Important safety notice 9
Photosensitive seizure warning 9
CONTRAINDICATIONS 9
INDICATIONS 9
WARNINGS AND PRECAUTIONS 9
Replaceable Parts 10
General Operating Conditions 10
Operating Environment 10
Storage, Packaging and
Transportation 10
Calibration 10
Interface 12
LED States 12
K-Grip 13
User qualification 13
Description 13
Benefits 13
Technical Features 13
Get Started 14
Accessories 14
K-Push 14
User qualification 15
Description 15
Benefits 15
Technical Features 15
Accessories 16
Get Started 16
K-Force Plates 18
User qualification 18
Description 18
Benefits 18
Technical Features 18
Installation 19
On the floor 19
On vertical surface 19
Accessories 19
Get started 19
K-Bubble 20
User qualification 20
Description 20
Benefits 20
Technical Features 20
Accessories 21
Get Started 21
K-Move 22
User qualification 22
Description 22
Benefits 22
Accessories : 22
Technical Features 22
Get Started 23
K-Pull 24
User qualification 24
Description 24
Accessories : 24
Technical Features 24
Get Started 25
K-Deltas 25
User qualification 26
Description 26
Benefits 26
Accessories 26
Technical Features 26
Installation 27
On the floor 27
Get started 27
K-Deltas XL 29
User qualification 29
Description 29
Benefits 29
Technical Features 29
Installation 30
On the floor 30
Get started 30
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K- SENSORS User Manual
Troubleshooting 31
Sensor difficulties 31
Connectivity difficulties 32
Legal information 33
Warranty Terms 33
European Union 33
Other countries 33
Service policy 33
Warning 34
Declaration of Conformity 34
FCC information 34
Canada 35
Japan 35
Switzerland 35
United Kingdom 36
Contact Information 36
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K- SENSORS User Manual
Introduction
Thank you for purchasing a K-Sensor.
K-SENSORS is the product line developed by KINVENT to objectively quantify
rehabilitation. The product line of K-SENSORS is the complete tool designed for assessing,
monitoring and exercising balance, strength, and joint motion. It consists of 7 sensors, all
of them equipped with high precision measuring systems and with the KINVENT's
excellence in interface development, mechanics and electronics.
K-Sensors series is composed of:
K-Grip
for the measurement of
hand grip strength
K-Bubble
for the rehabilitation with
biofeedback by the way of
inflatable tools
K-Push
the handheld muscle
dynamometer
K-Pull
for the strength
measurement regardless of
the operator
K-Force Plates
for the measurement of
lower limb strength as well
as balance
K-Deltas
for high speed jump
analysis and lower limb
strength and balance
K-Move
the connected
goniometer for the
measurement of joint
amplitudes
K-Deltas XL
for high speed jump
analysis and lower
limb strength and
balance
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K- SENSORS User Manual
Minimum Requirements: Android 5.0+ or iOS 10.0+, Bluetooth Low Energy, 5'' (12.7cm) Screen
diagonal
About us
KINVENT is specialized in the design and manufacturing of biomechanics equipment. Our
strength is that we can conceive and implement solutions to any challenge in sports
biomechanics and physical rehabilitation. Our products include ready-to-use force plates,
inertial wireless sensors, simulators and various custom-made applications.
Find more information on our products at www.k-invent.com.
Important safety notice
Photosensitive seizure warning
A very small percentage of people may experience a seizure when exposed to certain
visual images, including flashing lights or patterns that may appear in video games. Even
people who have no history of seizures or epilepsy may have an undiagnosed condition
that can cause these “photosensitive epileptic seizures” while watching video games.
These seizures may have a variety of symptoms, including altered vision, eye or face
twitching, jerking or shaking of arms or legs, disorientation, confusion, or momentary loss
of awareness. Seizures may also cause loss of consciousness or convulsions that can lead
to injury.
Immediately discontinue playing and consult a doctor if you experience any of these
symptoms.Parents should watch for or ask their children about the above symptoms.
CONTRAINDICATIONS
The K-Sensors are contraindicated under the following:
- On or near open wounds
- Patients having severe osteoporosis
- On or near burned tissue
- On or near the eye
- On or near fractures
- Not to be used for any purpose other than indicated
INDICATIONS
The K-Sensors are indicated under the following:
- Take care of the strong attachment or hold of each sensor.
- For a better reliability of the isometric strength measurement, the attachment position
should always be the same and should be perpendicular to the exerted force direction.
- For a better reliability of the range of motion measurement, the initial position should be
set as the zero-amplitude angle and the start should be pressed at this time. Take care to
avoid compensation of other limbs.
WARNINGS AND PRECAUTIONS
- The K-Sensors should only be used by trained professionals.
- The K-Sensors and accessories are provided non-sterile and are not compatible with
autoclave or other sterilization techniques. Do not autoclave.
- Use only a factory supplied wall pack power supply, charger. Use of another charger may
result in electrical shock or equipment damage.
- K-Sensors are not intended for use while attached to wall pack power supply or a
charger. Never attempt to operate the instrument while it is connected to the charger as
electrical shock or damage to the instrument may occur.
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K- SENSORS User Manual
- The K-Sensors are not protected against ingress of liquids. Keep sensors dry. Do not
immerse the K-Sensors or their accessories in water.
- The K-Sensors are precision medical sensors. The sensors should be treated with care.
Do not drop, bang, hit or subject the sensors to strong shock . Be careful to have a firm
grip when holding sensors in order to avoid accidental fall of the system which may
cause damage to the sensor or injury to the patient/operator.
- Not recommended for use in extreme temperatures, high humidity, or direct sunlight
- Ensure your patient is able to keep his balance while watching the screen to avoid fall
- Do not dispose of the K-Sensors sensor in fire.
- K-Sensors contain lithium-polymer batteries. Do not dispose of the batteries with
household waste
- Sensors are not known to contain any hazardous materials. For proper disposal
instructions, consult your local waste management facility. E-waste recycling should be
used where available.
- Do not service the battery while in use with a patient.
- Never disassemble or modify the system using any accessories not specifically approved
by KINVENT Biomécanique, LLC, this will void the warranty as well as reduce immunity to
electromagnetic interference, or increase electromagnetic emissions, and result in
improper operation.
- Don't place any K-Sensors components on unstable surfaces, or surfaces subject to
vibration.
- Medical Electrical Equipment needs special precautions regarding EMC. K-Sensors need
to be installed and put into service according to the information provided in this manual.
Replaceable Parts
●Straps
●Belts
●Handles
●Cushions
●Rubber attachments
General Operating Conditions
Operating Environment
K-Sensors must be used indoors. K-Sensors must be used only in clean, dry rooms with
leveled floors. Make sure you have plenty of space around you when you use it.
Storage, Packaging and Transportation
Temperature: -10 ºC to 40 ºC (14 ºF to 104 ºF)
Air Humidity: 30 % to 75 %
When not in use, please store them in the protective carrying pouch.
If the K Sensors are stored for longer than 30 days, check battery level and recharge if
necessary before using. Please observe the storage conditions and never store them in an
automobile except when transporting them.
Calibration
K-Sensors gives you metrics on the human muscular force. K-Sensors are sold already
calibrated, to make them ready for use out of the box.
We recommend that the product be tested for calibration at least once a year under
normal use or sooner under severe conditions and usage. K-Sensors are not user
serviceable and do not include a service manual. For more information on calibration as
well as special requirements, please contact your K-Sensors dealer.
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K- SENSORS User Manual
Interface
All K-Sensors share the same interface
1- Multi color LED
2- USB-C charge port
3- Power on/ Command orange button
LED States
●When the sensor is connected via USB, the sensor will turn on (GREEN flashing
LED) and begin to charge the internal battery.
●After 10 min, if not connected to the application, it will automatically power off . The
battery will continue to charge indicated by a pulsing ORANGE light.
●Once the battery reaches full charge the sensor will indicate this by switching to
permanent WHITE light. If power is removed the sensor will power on again.
●The sensor can wake by plugging in the USB cable or pushing the orange
button.The GREEN led starts blinking.
●When a successful connection over Bluetooth is attained then the light begins
flashing BLUE
●If the battery is low, then a RED light will flash intermittently three times and every
5 seconds. Wireless range may be affected if operating under this condition.
●The sensor will switch off if the battery voltage is lower than 1%.
●A single push on the button will display the battery status via bright red,yellow, or
green light depending on charge level.
Sensor is OFF
LED is OFF
Sensor is ON
LED is Blinking GREEN
Button pressed once
Shows battery status for 5 seconds.
Green >70% charge
Yellow >30% charge
Red <30%
Sensor Connected
LED is Blinking BLUE
Charging
LED Slow ORANGE blink
End of charge
LED is Steady WHITE
Sensor has low
battery (<10%)
LED blinks three
times RED
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K- SENSORS User Manual
K-Grip
User qualification
The K-Grip must be used by a health professional.
Description
K-Grip is used for the evaluation of hand grip
strength. You can assess isometric strength by the
way of the peak force as well as of the average force.
The Grip dynamometer quantitatively measures the
grip weakness caused by injury compared to the
strength of the healthy hand.
Benefits
K-Grip is equipped with electronic force transducers and gives you real-time biofeedback
on your tablet or smartphone through the Kinvent Physio app. Therefore, you can set
strength objectives for your patient and motivate him through the process of
rehabilitation. You will, then, follow-up your patient's progress through the Kinvent Physio
interactive database.
Technical Features
Minimum Requirements
Android 5.0+ or iOS 10.0+, Bluetooth Low
Energy
Weight
170 g / 6 oz
Dimensions (H x W x D)
A- Ribbon attachment point.
B- Button
Metric : 146.5 x 36 x 60.5 mm
US : 5.77 x 1.42 x 2.38 “
Wireless Range
Up to 40 meters / 44 yd
Max Force
90 kgs / 198 lbs
Battery
12 hours continuous use, 2h for charging
Power supply
Li-Po Battery 280 mAh
Radiated output Power
Max. 10 mW
Wireless transmission Frequency
2.4GHz band (Bluetooth Low Energy 5.1)
Adjustable handle size
Soft TPE detachable (magnetic) grip covers
Accuracy
< 0.2%, +-0.1kg / +-0.22lbs
Eco features
Self activated “sleep” mode after 10 minutes.
Units
Selectable in application KgF, N, lbs
Acquisition frequency
1000Hz
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K- SENSORS User Manual
Get Started
On the top surface of the sensor there are : one USB-C port used for charging, one LED
indicator for the working state/charging state and one push-button.
You can charge your K-Grip sensor through the USB A to USB C cable provided or with
any USB-C charging cable. The sensor is supplied with the appropriate IEC 60601 medical
USB power supply. If a different charger is used, ensure that it meets the minimum
medical safety requirements and if unsure please do not use the sensor while plugged
in/charging.
Disinfect K-Grip prior to use. Low level or intermediate level disinfectants should be
used (e.g. alcohol wipes). Do not use bleach to clean the plastic parts, prefer alcohol
blends
Press the orange power on button on K-Grip. The indicator begins flashing green. Your
sensor is ON! Your sensor will turn off after 10 minutes of no Bluetooth connection or no
application connection.
Once the sensor is turned on, select the K-Grip sensor activity in the Home Page. At this
step, the K-Grip is connected and the LED starts flashing Blue.
While your K-Grip is connecting, don't apply force on the sensor, don't step on the
sensor, don't move the sensor, keep it vertical on a flat surface.
Accessories
The K-Grip is provided with an attaching cord (removable) at the rear of the sensor. Use
this cord to secure the sensor at the patient’s arm
The K-Grip has optional changeable grip sizes that allow it to fit different sizes of hands.
They are easily attached magnetically and removed by simply pulling them with about 1
kg /2 lbs of force straight forward. The sensor is supplied with the regular size bumper
accessory. For further sizes please consult the catalog.
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K- SENSORS User Manual
K-Push
User qualification
The K-Push must be used by a trained health
professional. The user must have received sufficient
training in clinical procedures to get reliable
measurements.
Description
K-Push is a handheld dynamometer used for the
strength evaluation of different muscles. You can
assess isometric strength through the peak force as
well as the average force for a specific muscle or
muscle groups.
The K-Push allows to quantitatively measure the muscle strength and the deficit
percentage caused by injury compared to the strength of the healthy side.
Benefits
K-Push is equipped with electronic force transducers and gives real-time acoustic and
optic Biofeedback on your Smartphone or Tablet through the Kinvent Physio app.
Through its Target oriented exercises, you can set objectives to your patient and
encourage him to surpass himself. The app saves your participant's results. You can then
follow-up his progress on Maximal Force, Endurance, and muscular Symmetry on the
app's database.
Technical Features
Minimum Requirements
Android 5.0+ or iOS 10.0+, Bluetooth Low
Energy
Weight
370 g / 13 oz (including the starter pillow)
Dimensions (H x W x D)
Metric 49 x 142 x 76 mm;
US : 1.93 x 5.6 x 3”
Wireless Range
Up to 40 meters / 44 yd
Max Force
90 kgs / 198 lbs
Battery
12 hours continuous use, 2h for charging
Power supply
Li-Po Battery 280 mAh
Radiated output Power
Max. 10 mW
Wireless transmission
Frequency
2.4GHz band (Bluetooth Low Energy 5.1)
Adjustable handle size
Silicon pillow with soft center
Accuracy
< 0.1%, +-0.1kg / +-0.22lbs
Eco features
Self-activated “sleep” mode after 10 minutes.
Units
Selectable in application KgF, N, lbs
Acquisition frequency
1000Hz
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K- SENSORS User Manual
Accessories
The sensor has an option to fit accessories through the top magnetic coupling.
The Twin Handle is an accessory that makes the K-Push easier to handle at greater forces.
It is suitable for measures that require a stable and controlled two-handed grip. The use of
a hand-held dynamometer has never been so comfortable
The Nordic assessment set, allows secure mounting of the K Push on gym bars or iso-box
to use for the nordic hamstring assessment protocol.
Get Started
The sensor comes with the cushion preinstalled on the sensor. The cushion can be very
easily installed as it snaps in place
Next, configure the strap length according to your hand and place it over it. Otherwise,
you can replace the default handle by the Nordic or the Twin Handle accessory.
The cushion can be removed for cleaning. Use antiseptic alcohol wipes to disinfect the
cushion prior to use.
To change the handle twist clockwise 45 degrees (diagonal position). The handle will lift
on its own, so you can then easily pull and remove
On the top surface of the sensor there are
One USB-C port used for charging, one LED indicator for the working state/charging state
and one push-button.
You can charge your K-Push sensor through the USB A to USB C cable provided or with
any USB-C charging cable. The sensor is supplied with the appropriate IEC 60601 medical
USB power supply. If a different charger is used, ensure that it meets the minimum
medical safety requirements and if unsure please do not use the sensor while plugged
in/charging
sensor
Press the orange power on button on K Push. The indicator begins flashing green. Your
sensor is ON! Your sensor will turn off after 10 minutes of no Bluetooth connection or no
application connection.
Once the sensor is turned on, select the K Push sensor in the Home Page. Select the body
part you want to measure and then select one of the proposed exercises. Once the K Push
is connected, the LED turns Blue.
While your sensor is connecting, do not load the sensor, do not step on the sensor, do
not move the sensor, and do not apply force on the sensor.
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K- SENSORS User Manual
K-Force Plates
User qualification
The K-Force Plates must be used by a
health professional.
Description
K-Force Plates are two independent force
platforms for rehabilitating balance and
assessing lower limb muscular symmetry
and strength.
Benefits
K Plates are equipped with electronic force
transducers and give real-time acoustic and
optic biofeedback on your Smartphone or Tablet through the Kinvent Physio app. Each
platform has 4 independent sensors on the corners, allowing measurement of the center
of pressure. Each foot comes with a mounting thread so that the sensor can be fixed on a
surface.
Technical Features
Minimum Requirements
Android 5.0+ or iOS 10.0+, Bluetooth
Low Energy
Weight
2000 grams / 4.4 lbs
Dimensions (H x W x D)
Metric 30 x 346 x 191mm
US : 1.18x13.62x7.52”
Wireless Range
Up to 40 meters / 44 yd
Max Force
600 kg / 1322 lbs per platform
Battery
20 hours continuous use, 2h for
charging
Power supply
Li-Po Battery 800 mAh
Radiated output Power
Max. 10 mW
Wireless transmission
Frequency
2.4GHz band (Bluetooth Low Energy
5.1)
Accuracy
< 0.1%, +-0.1kg / +-0.22lbs
Eco features
Self-activated “sleep” mode after 10
minutes.
Units
Selectable in application KgF, N, lbs
Acquisition frequency
1000Hz Full CoP
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K- SENSORS User Manual
Installation
Install K-FORCE PLATES according to the measurement selected.
On the floor
This configuration is ideal for balance exercises. You can place the K-FORCE PLATES on
the ground either side by side or spaced apart. This increases the difficulty level of balance
exercises, as you can work on your lower limbs muscular force at the same time.
On vertical surface
K-FORCE PLATES can be attached on a vertical surface (Wall) to measure upper limbs
muscular strength, or even on weightlifting machinery such as a Leg Press Machine. To
this end, use Velcro sticks with at least 200 cm2/ 31 in2surface. For your safety, please
make sure that K-FORCE PLATES are well fixed on vertical surfaces before using.
Accessories
The Jump Frame is an accessory for the K-Force Plates that allows it to stabilize the
platforms and to obtain a larger surface at equal height to perform jumps in complete
safety. It also allows you to adjust the distance between the plates to easily adapt it to the
patient’s comfort. In addition, it ensures reproducibility of measurements under similar
conditions. The Jump Frame is made of rigid foam. Lightweight and transportable, it will
ensure the safety of your patients.
Get started
On the side surface of the sensor there are
One USB-C port used for charging, one LED indicator for the working state/charging state
and one push-button. On the top surface a second LED indicator is present that works
together with the first on the side.
You can charge your K-Force Plates sensors through the USB A to USB C cable provided or
with any USB-C charging cable. The sensor is supplied with the appropriate IEC 60601
medical USB power supply. If a different charger is used, ensure that it meets the
minimum medical safety requirements and if unsure please do not use the sensor while
plugged in/charging
Disinfect K-FORCE PLATES prior to use, using antiseptic alcohol wipes.
Press the orange power on button on K-Force Plates. The indicators begin flashing green.
Your sensor is ON! Your sensor will turn off after 10 minutes of no Bluetooth connection or
no application connection. Turn on both platforms
Once the sensor is switched on, go to the homepage, and select Plates sensor and an
activity.
Warning: While your sensor is connecting, do not load the sensor, do not step on the
sensor, do not move the sensor, do not apply force on the sensor.
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K- SENSORS User Manual
K-Bubble
User qualification
The K-Bubble must be used by a health
professional.
Description
K-Bubble is a pneumatic sensor allowing to work
your strength with convenient inflatable tools.
Benefits
K-Bubble is equipped with a pneumatic (pressure)
sensor and gives you real-time biofeedback based
on the pressure applied on the inflatable cushion
used.
Technical Features
Minimum Requirements
Android 5.0+ or iOS 10.0+, Bluetooth
Low Energy
Weight
36 g / 1.27 oz
Dimensions (D xH)
Metric ⌀53 x30 mm ;
US ⌀2.09 x 1.18 “
Wireless Range
Up to 50 meters / 54 yd
Max Pressure
0.4 Bar / 5.8 PSI
Battery
12 hours continuous use, 1.5h for
charging
Power supply
Li-Po Battery 160 mAh
Radiated output Power
Max. 10 mW
Wireless transmission
Frequency
2.4GHz band (Bluetooth Low Energy
5.1)
Accuracy
< 1.5%
Eco features
Self-activated “sleep” mode after 10
minutes.
Units
Selectable in application KgF, N, lbs
Acquisition frequency
125Hz
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K- SENSORS User Manual
Accessories
The K-Bubble accessory pack contains the following inflatable tools
Body Roll
Senso ball 23cm / 9.05”
Air Grip
Get Started
The sensor is equipped with a USB C port used for charging, 1 LED for the
working/charging state and one push-button.
You can charge your K-Bubble sensor through the USB A to USB C cable provided or with
any USB-C charging cable. The sensor is supplied with the appropriate IEC 60601 medical
USB power supply. If a different charger is used, ensure that it meets the minimum
medical safety requirements and if unsure please do not use the sensor while plugged in /
charging sensor.
Press the orange power on button on K Bubble. The indicator begins flashing green. Your
sensor is ON! Your sensor will turn off after 10 minutes of no Bluetooth connection or no
application connection.
Put the needle in the valve of your inflatable tool, then go to the homepage and select
the corresponding inflatable tool and begin to work following the onscreen instructions.
Important
- Moisten the needle before inserting in the inflatable accessories to prevent
damage and improve the seal.
- Carefully insert the needle straight into the needle valve of the accessory.
- The needle must fit tight, without touching the internal opposite side of the
inflatable accessory
Zeroing of the pressure
The test result comparability is influenced by the pressure inside the inflatable accessory.
After inserting the needle in the valve, unscrew about half a turn the needle from the
socket to allow the pressure to equalize for about 5 sec. Then tighten the needle again.
Please make sure that everything is tight and when squeezing and no air leak is heard or
air bubbles are formed on the valve. Although the sensor is working in absolute terms and
is thus unaffected by the external/internal pressure difference the inflatable accessory will
behave differently if over- or under- inflated.
In order to change accessories the above process will have to be repeated.
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K- SENSORS User Manual
K-Move
User qualification
The K-Move must be used by a health
professional.
Description
K-Move is an inertial sensor to measure the range
of motion and to compare the symmetry between
the injured limb’s amplitude and the healthy limb.
Benefits
K-Move is equipped with an IMU sensor and gives
you real-time biofeedback based on the evolving
range of motion compared to the initial movement position.
Accessories :
K-Move is provided with accessories for a turnkey operation:
Different size belts:
●36cm / 14.1” used for biceps
●57cm / 22.4” thighs/triceps
●77cm / 30.3” torso/head
Technical Features
Minimum requirements
Android 5.0+ or iOS 10.0+, Bluetooth Low
Energy
Weight
18 g / 0.63 oz
Dimensions (H x W x D)
Metric 12.5 x 34.5 x 44.5 mm ;
US : 0.49 x 1.36 x 1.75 “
Wireless range
Up to 50 meters / 54 yd
Max Accelerations
+-16g
Static Accuracy
2°
Dynamic accuracy (head., pitch,
roll)
7°, 2°,2°
Power Supply
Li-Po Battery 160mAh
Battery
12h of autonomy, 1.5h for charging
Wireless transmission
frequency
2.4GHz band (Bluetooth Low Energy 5.1)
Data rate
400 Hz
20 © 2022 KINVENT Biomecanique E2022C_EN