USER MANUALCONTENTS
Contents
Introduction
Get started
Speed sensor parts
Installing the speed sensor
Pairing
Important information
Care and maintenanceBattery
Frequently asked questions
Technical Specification

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INTRODUCTION
Polar Speed Sensor is designed to measure speed and distance when cycling. The sensor is compatible devices that supportBluetooth® Cycling Speed Service.
You can use your sensor with dozens of leading fitness apps, as well as with Polar products using Bluetooth® technology.
Check the compatible products at support.polar.com/en.

The latest version of this user manual can be downloaded at support.polar.com/en.

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GET STARTEDSPEED SENSOR PARTS
1. Speed sensor (pictures 1 A and 2 A)
2. Spoke magnet (picture 2 B)
Picture 1.

Picture 2.

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INSTALLING THE SPEED SENSOR
To install the speed sensor and spoke magnet, you need cutters and a cross-head screwdriver.
1. It is recommended to install the speed sensor on the front fork of your bicycle (as in picture 1 A).
2. Attach the rubber part to the speed sensor (picture 3).
Picture 3.

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3. Pass the cable ties over the speed sensor and rubber part (picture 2 A). Adjust the sensor to the front fork so that thePOLAR logo faces outwards. Adjust the ties loosely. Do not tighten them fully yet.
4. Attach the magnet to a spoke at the same level as the speed sensor (picture 2). There is a small caved dot on thebackside of the sensor (picture 3 A), which indicates the spot the magnet should be pointing at when passing thesensor. Fasten the magnet to the spoke and tighten it lightly with a screwdriver. Do not tighten it fully yet.
5. Fine-tune the positioning of both the magnet and the speed sensor so that the magnet passes close to the sensor but
does not touch it (picture 2). Move the sensor towards the wheel/spokes as close as possible. The gap between thesensor and the magnet should be under 4 mm/0.16’’. The gap is correct when you can fit a cable tie between themagnet and the sensor.
6. Rotate the front tire to test the speed sensor. The flashing red light on the sensor indicates that the magnet and thesensor are positioned correctly. If you keep rotating the tire, the light will stop flashing. Tighten the screw to themagnet with a screwdriver. Also tighten the cable ties securely and cut off any excess cable tie ends.

Before you start cycling, set the wheel size of your bicycle into the receiving device or mobile application.

PAIRINGYour new sensor must be paired with the receiving device in order to receive data. For more information, see the user
guidance material of the receiving device or mobile application.
To ensure a good connection between the sensor and the receiving device, it is recommended to keep thedevice in a bike mount on the handlebar.

6IMPORTANT INFORMATIONCARE AND MAINTENANCE
Keep the sensor clean. Clean it with a mild soap and water solution, and rinse off with clean water. Dry carefully with a soft
towel. Never use alcohol or any abrasive material, such as steel wool or cleaning chemicals. Do not immerse the sensor inwater.
Your safety is important to us. Make sure that you can turn your handlebars normally and that the cable wires for brakes orgears do not catch the bike mount or sensor. Also, make sure that sensor does not disturb pedaling or using the brakes orgears. While riding your bike, keep your eyes on the road to prevent possible accidents and injury. Avoid hard hits as thesemay damage the sensor.
Replacement magnet sets can be purchased separately.

BATTERY
The battery cannot be replaced. The sensor is sealed in order to maximize mechanical longevity and reliability. You canpurchase a new sensor from the Polar online store at www.polar.com or check the location of nearest retailer at
www.polar.com/en/store-locator.
The battery level of your sensor is displayed on the receiving device if it supports Bluetooth® Battery Service.
To increase battery life, the sensor goes into standby mode in thirty minutes if you stop cycling and the magnet is not
passing the sensor.

FREQUENTLY ASKED QUESTIONSWhat should I do if...
...the speed reading is 0 or there is no speed reading while cycling?
lllllMake sure the position and distance of the sensor to the magnet are appropriate.
Check that you have activated the speed function in the receiving device. For further information, see the user
guidance material of the receiving device or mobile application.
Try keeping the receiving device in a bike mount on the handlebar. This may improve the connection.
If the 0 reading appears irregularly, this may be due to temporary electromagnetic interference in your current
surroundings.
If the 0 reading is constant, the battery may be empty.

...there are irregular speed, distance or heart rate readings?
lDisturbance may occur near microwave ovens and computers. Also WLAN base stations may cause interference
when training with Polar Speed Sensor. To avoid erratic reading or misbehaviors, move away from possible sourcesof disturbance.

... I want to pair the sensor with the receiving device before installation?
lFollow the instructions in the user guidance material of the receiving device or mobile application. Instead of rotating
the crank/wheel, activate the sensor by moving it back and forth close to the magnet. The flashing red light indicatesthat the sensor is activated.

How do I know...
... if the sensor is transmitting data to the receiving device?
l

When you begin cycling, a flashing red light indicates that the sensor is alive and it is transmitting speed signal. As youcontinue cycling, the light stops flashing.

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TECHNICAL SPECIFICATION
Operating temperature:-10 °C to +50 °C / 14 °F to 122 °F
Battery life:
Average 1400 hours of use.
Accuracy:±1 %Material:
Thermoplastic polymer
Water resistance:
Splash proof
FCC ID: INWY6
Speed Sensor Bluetooth QD ID: B021136
Copyright © 2021 Polar Electro Oy, FI-90440 KEMPELE. All rights reserved. No part of this manual may be used orreproduced in any form or by any means without prior written permission of Polar Electro Oy. The names and logos marked
with a ™ symbol in this user manual or in the package of this product are trademarks of Polar Electro Oy. The names andlogos marked with a ® symbol in this user's manual or in the package of this product are registered trademarks of Polar
Electro Oy. The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use ofsuch marks by Polar Electro Oy is under license.

2.0 ENG 2/2023

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