Waterproof Brake Sensor + 1T5 Data Cable (Juliet / 9-Pin Controller Plug)
Designed for pedal bicycles • Neat, plug-and-play wiring • Water-resistant connectors
✅ What it does
Adds brake cut-off functionality by using a magnetic sensor on your brake lever, helping cut motor power when braking.
✅ Why you’d need it
Our 250W kits do not include brake sensors as standard. This add-on is for riders who want brake cut-off sensors installed.
✅ Connectors
Waterproof Juliet connectors + a 9-pin controller plug for a tidy, reliable connection.
Product Overview
This listing includes a waterproof brake sensor cable with magnets plus a 1T5 data cable.
The brake sensor is designed to mount neatly to a hydraulic or mechanical bicycle brake lever, allowing the system to
cut motor power when braking (when connected and configured with a compatible controller).
⭐ Key Features
- Brake cut-off sensor with magnet set (for hydraulic or mechanical levers)
- Waterproof Juliet connectors for cleaner installs and improved weather resistance
- 9-pin plug to controller (simple, tidy controller connection)
- Add-on for 250W kits where brake sensors are not included as standard
🔌 1T5 Data Cable Functions
The 1T5 harness provides connections for the following (model-dependent):
- Headlight / light output
- Brake sensor input(s)
- Display connection
- Throttle connection
- Left / right control connection (where applicable)
Note: Exact port usage can vary slightly between controller/display setups.
📦 What’s Included
- 1 × Waterproof brake sensor cable (Juliet type)
- Magnets / mounting pieces (as shown)
- 1 × 1T5 waterproof data cable / harness
- 1 × 9-pin controller plug connection (on the harness)
🛠️ Installation Notes
- Clean the brake lever area before fitting the sensor/magnet for best adhesion and alignment.
- Position the magnet so it passes the sensor closely when the lever is released (and separates when braking).
- Connect matching waterproof plugs carefully—align arrows/keys and do not force connectors.
- If you’re unsure, a local bike mechanic can fit this quickly.
✅ Compatibility
Compatible with many aftermarket e-bike controllers/displays that use waterproof Juliet-style connectors and a
9-pin controller harness connection. Designed as an optional add-on for our 250W conversion kits
for riders who want brake cut-off sensors installed.
⚠️ Safety & Support
- Brake sensors are a helpful safety feature, but always ensure your brakes are correctly adjusted and maintained.
- For compatibility questions, message us with a photo of your controller/display plugs and we’ll help confirm fitment.
E-Bike Power UK® • Quality parts • Friendly UK support