ACT Head Impact Tracker head sensor

ACT Head Impact Tracker head sensor

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Unit price
VAT 24% included

What is ACT Head Impact Tracker head sensor?

ACT Head Impact Tracker head sensor measures forces acting on your head while doing sports. It measures what is it attached to, hence  it is highly recommend to attach ACT Head Impact Tracker head sensor to your head with a tight-fitting head accessory of choosing. Also when wearing a helmet.

Product details
Name: ACT Head Impact Tracker head sensor
Casing materials: silicone, EDPM closed cell foam
Color: dark grey
Dimensions: 46,70mm x 34,40mm x 7,60mm
Net weight (without coin cell battery): under 20g
Operating temperature: -10°C to 40°C
Water/dust protection: Not suitable for water sports or under water use.
Communications: Bluetooth® 5.0 Low energy. The range may vary significantly depended on multiple factors such as surroundings. It can be anything from <10 meters (<30 feet) to 100 meters (300 feet).
Maximum power: 0 dBm
Operating frequency: 2360-2500 MHz
Battery: CR2032 replaceable coin cell battery (> 225mAH). Battery is not included.
Battery life span: 100-200 hours operating time (i.e. when the sensor is on).
The smallest impact forces shown: 10g
Accelerator scale 100.
Theoretical maximum g-force is 173.
Certifications: CE, FCC, IC
Estimated delivery time at the moment: 2-6 weeks.
Warranty: Northern Sports Insight and Intelligence Oy warrants to the original purchaser of this product that the product is free from defects in material and workmanship for a period of three months from the original date of purchase.
Manufacturing site: ACT Head Impact Tracker head sensors are assembled in Estonia by Incap Electronics Estonia . They are part of Incap Oyj, stock exchanged global electronics manufacturing services player with headquarters in Finland.

Attaching head sensor to a head accessory or helmet
Head sensor can be attached to almost any kind of head accessory or wear with hook&loop (Velcro): variety of hair bands, head bands or helmets. Choose what you use, or buy one of ACT Head Impact Tracker accessories specifically designed for it. What ever your head wear, gear or accessory of attachment, ensure the sensor is firmly attached, and can not move or get loose. Head sensor has to stay put and in place to give quality measurement.
The back panel of the head sensor has an adhesive surface that you can use by removing the protective film on top of it. We recommend that you use the adhesive surface to attach the hook tape to it, with which you can attach the head sensor to the specifically designed ACT Head Impact Tracker headband, ACT Head Impact Tracker Dock or other head accessory of your choosing with loop-side on it, or where you can attach loop side onto. Please note that the adhesive surface is very adhesive, consider carefully where or what you want to attach to it. 
If you consider attaching the head sensor to a helmet, refer to your helmet’s User Manual, Owner’s Guide or corresponding document to verify if it is possible. Always follow the helmet manufacturer's instructions on safe helmet use. Only use a helmet that meets the applicable safety standards when you use a helmet with ACT Head Impact Tracker head sensor.  Please note that magnitude measurements will be affected by the helmet attachment: forces measured from the helmet are not the same as forces acting on a head inside the helmet. 

Important usage information
1. ACT Head Impact Tracker smartphone mobile App is needed to operate head sensors. The App is currently available for Android only, you can download it in Google PlayStore. App is free to download and may later on contain in-App purchases. Please note that App's functionality with all mobile device brands and models have not been tested and cannot be guaranteed. Some brands and models require using manual scanning. See the list of tested brands and models, and other instructions in our Help FAQ in
2. Give App permission to use Location services, and ensure Bluetooth® wireless technology connection are on and enabled on your mobile device for ACT Head Impact Tracker App and always when using the head sensor, or ACT Head Impact Tracker will not function. 
3. In the smartphones where there is "Nearby Devices" functionality, you must give ACT Head Impact Tracker App permission to use it, or ACT Head Impact Tracker will not function. If your phone do not have "Nearby Devices" functionality, the permission is not needed.
4. Ensure that you have a valid SIM-card or e-SIM, mobile data, and roaming (if needed) enabled, on and active, or that you are connected to Wi-Fi, in your mobile device with ACT Head Impact Tracker smartphone mobile App always when using the head sensor. Otherwise ACT Head Impact Tracker will not function.
5. If passive sensory scanning (default and automatic) is not working in your mobile device, use Active scanning to connect with sensors (current version of active scanning not recommended for team use). More information in "Help" and in head sensor "User Manual".
6. Be aware of the reach limitations in data transfer between the head sensor and the mobile device with ACT Head Impact Tracker Smartphone mobile App. In case of an incident, keep the distance between the head sensor and the mobile device with the App as short as possible (the reach could be even less than 10 meters), or ACT Head Impact Tracker might not function as intended. Data transfer reach may vary significantly depending on, but not limited to: place of use, weather, smartphone model and brand, buildings and obstacles on the signal’s route. In case of an incident, take the smartphone with the App as close to the head sensor as possible. 
7. The head sensor will switch off automatically after 3 hours (after 180 minutes). If your activity session lasts three hours or more, make sure to switch the sensor back on every three hours.
8. Your ACT Head Impact Tracker application is part of system, where information flow from the head sensors to the cloud takes place. Use of mobile data on your mobile device with the application may occur at any time when ACT Head Impact Tracker head sensors are used. If you do not wish to be part of the system, turn Bluetooth® wireless connection off or turn off the mobile data in your mobile device.

Before you order, please note
- See our Terms of Sale, Return and Exchange policy and Form in this website ( for more information before you place your order.
- Due to hygienic nature of the product and one-time-only-registration of the head sensor you may only return and get refund on unworn and unused product(s) in their original unopened, untouched and sealed packaging. If you have opened the seal sticker on the head sensor packaging, or otherwise tampered on it, you may not return or get refunded on it.
- ACT Head Impact Tracker head sensor User Manual is online and available on this website ( The User Manual is available “as is”, and in the languages there today only. We make no representation that more translations or localized texts will be made available upon your time of ordering or when you receive your products.
- A fixed handling and shipping fee will be added to each delivery. The fee depends on the destination country and is as follows:
1. Delivery to address in Finland: 12,00€ / delivery (including VAT 24%)
2. Delivery to address in other member states of European Union: 25,00€ / delivery (including VAT 24%)
- You will be fully responsible for paying any and all applicable Import charges and taxes directly to the relevant authority (and for reclaiming them in the event of a cancellation, an exchange or a return of Products(s), to the extent possible under the laws of your country) as determined by the authorities of the delivery destination country, and we shall have no responsibility or liability in connection with the foregoing.
- We currently only deliver from the web store to EU member states.
- Orders and inquiries from other countries, please email us contact(at)
- Business-to-Business orders and inquiries from EU and other countries, please email us contact(at)

- ACT Head Impact Tracker is a measuring device. ACT Head Impact Tracker products or services are not medical devices and do not provide medical advice, any kind of diagnostics or treatment suggestions of any health problem. ACT Head Impact Tracker products or services, any content or information therein, is not to be used in place of consultation of licensed medical professional. In case of a head impact, or when suspecting one or a concussion, immediately and safely leave the activity and seek help from licensed medical professionals. It is advisable to have an accompanying person if concussion is possible. In case of an emergency, call an ambulance. If you have been given medical advice by licensed medical professional, always follow that advice despite any information or content in or from ACT Head Impact Tracker. Northern Sports Insight and Intelligence Oy or ACT Head Impact Tracker products or services are no health care specialists, neither is communication between you and us or ACT Head Impact Tracker forming any kind of doctor – patient relationship.
- ACT Head Impact Tracker products or services are not protective devices. They do not prevent incidents from happening and they do not protect against injuries or any kind.
- Not suitable for children under 36 months of age. Contains small parts. Risk of suffocation!
- Keep product and packaging out of reach of children and animals.
- Place the head sensor only in a location where direct impacts do not occur. If you feel discomfort or pressure, the head sensor is not in a right location. 

We do not guarantee that ACT Head Impact Tracker products or services will meet your requirements. We do not guarantee that ACT Head Impact Tracker smartphone mobile Application, sensor hardware or firmware, cloud service or firmware, data transfer or any other part of the products or services, any information obtained or not obtained from using the products or services will be safe, error-free, secure or timely. We do not guarantee that information received or not received when using ACT Head Impact Tracker is safe, timely, accurate or reliable, or that the errors in the products or services are corrected. We cannot guarantee that ACT Head Impact Tracker product or services or any content on them, will always be available or uninterrupted.