When searching for an e bike brake sensor kit, you want a solution that offers reliable safety features, seamless compatibility, and durable performance. The Zoom HB876E Hydraulic Brake Set stands out as the best overall choice for its excellent hydraulic braking and sensor integration, ideal for serious riders. The Magnetic Brake Sensor appeals for quick DIY upgrades, while the Waterproof Brake Sensor with Indicator Light offers enhanced visibility and weather resistance. Readers face tradeoffs between cost, ease of installation, and sensor responsiveness. Keep reading to see how these options compare and find the best fit for your e-bike setup.
Key Takeaways
- Hydraulic brake sensor kits generally provide superior responsiveness and durability, making them ideal for high-performance e-bikes.
- Wireless and magnetic sensors are easier to install but may sacrifice some reliability in harsh weather conditions.
- Waterproof connectors and indicator lights significantly improve safety and visibility during riding, especially in adverse weather.
- Compatibility varies widely; choosing a kit that matches your e-bike‘s existing brake system prevents installation headaches.
- Higher-priced kits often include pre-bled calipers and comprehensive connectors, which save time but may not be necessary for casual riders.
More Details on Our Top Picks
Zoom HB876E Hydraulic Disc Brake Set for E-Bikes, Mountain Bikes, and Road Bikes
This hydraulic brake set stands out for its combination of powerful stopping ability and safety features like sensor control that cuts motor power during braking. Compared with the simpler magnetic sensors, the Zoom HB876E provides more reliable and consistent braking performance, especially for e-bikes used on varied terrains. Its hydraulic operation ensures smooth, quiet braking, which is a significant upgrade over mechanical options. However, installation requires careful alignment and hose customization, which might challenge DIY enthusiasts. The long hoses offer flexibility for different bike frames, making it suitable for a broad range of e-bikes, from mountain to road models. This pick is ideal for riders seeking reliable, high-performance safety features integrated into a comprehensive brake system.
Pros:- Powerful and reliable braking across terrains
- Quiet operation with resin-metal composite pads
- Sensor system enhances safety by cutting motor power
- Flexible hose lengths for various bike setups
Cons:- Installation may need careful alignment and bleeding
- Hose lengths might require modification for some bikes
Best for: E-bike riders who want a versatile, high-performance brake set with integrated safety features across different terrains
Not ideal for: Beginners or those with limited mechanical skills, as installation can be complex and requires precise adjustment
- Number of Pistons:4
- Brake Type:Hydraulic Disc Brakes
- Suitable for:E-Bike, Mountain Bike, Road Bike
- Color:Red
- Front Hose Length:950mm
- Rear Hose Length:1850mm
Our verdict“This set is best suited for experienced e-bike riders seeking a versatile, safety-oriented hydraulic brake solution.”
Magnetic Brake Sensor for Electric Bicycle, Universal 2-Pin Electric Bicycle Motor Cutoff Switch
This magnetic brake sensor offers a straightforward, cost-effective way to improve safety by instantly cutting off motor power during braking. Compared to hydraulic sets like the Zoom HB876E, it provides a quick response with minimal installation requirements. Its universal 2-pin compatibility suits most electric bicycles, but the lack of detailed specs means it’s less customizable and may not fit all models perfectly. It’s ideal for riders who want a simple safety upgrade without the complexity of hydraulic systems, especially those with basic mechanical skills. While not as durable or powerful as hydraulic options, its ease of installation and affordability make it a practical choice for casual riders or those on a budget.
Pros:- Ensures immediate power cut-off during braking
- Universal compatibility with most e-bikes
- Easy to install with ready-to-use package
- Cost-effective safety upgrade
Cons:- Limited detailed specifications
- Less durable than hydraulic options
- Potential fitment issues on some bike models
Best for: Casual e-bike users seeking a simple, reliable safety sensor that’s easy to install
Not ideal for: Riders needing high-performance braking or customizing for demanding terrains, as it offers basic functionality
- Compatibility:Universal for electric bicycles
- Pin Type:2-pin
- Function:Motor cutoff switch
Our verdict“This sensor is perfect for budget-conscious riders wanting a quick, reliable safety feature without hydraulic complexity.”
Electric Bicycle DIY Modification kit Accessories, Hydraulic or Mechanical Type Power-Off Brake sensors, Front and Rear Brake sensors Length: 1650MM/64.9inch
This DIY brake sensor kit offers wide compatibility with hydraulic and mechanical brake systems, making it ideal for custom e-bike projects. Its response time under 10ms and wide voltage range ensure quick, reliable power cut-off, surpassing basic magnetic sensors in responsiveness. The 1650mm cable with bend-resistant design simplifies installation on diverse bike frames, and the adhesive mount speeds setup. Compared with the simpler magnetic sensors, this kit provides a more integrated and durable solution for those comfortable with wiring and adjustments. The main tradeoff is that installation requires some technical skills, and setup can be time-consuming for beginners. It’s best suited for experienced DIYers looking to upgrade or modify their e-bike’s safety system.
Pros:- Wide compatibility with hydraulic and mechanical brakes
- Fast response time under 10ms
- Durable, bend-resistant cable
- Easy adhesive mounting for quick setup
Cons:- Requires technical wiring skills
- Installation can be time-consuming for novices
Best for: Experienced DIYers seeking a flexible, high-performance brake sensor upgrade for hydraulic or mechanical systems
Not ideal for: Beginners or casual riders who prefer plug-and-play solutions, as installation may be complex
Our verdict“This kit is suitable for skilled DIYers aiming for a customized, high-performance safety upgrade.”
2Pcs Waterproof EBike Brake Sensor Sensitive 2 Pin Magnetic Cable for Electric Bikes Reliable Bike Brake Lever Sensor Cable for Enhanced Safety
This pair of waterproof magnetic brake sensors offers a reliable safety upgrade, especially in adverse weather conditions. Compared to hydraulic systems like the Zoom HB876E, these sensors excel in durability and weather resistance, making them ideal for outdoor riders. Their waterproof design ensures consistent performance in rain or mud, though they lack the power and precision of hydraulic brakes. Easy to install, these sensors are suitable for most e-bikes needing a quick safety fix without extensive modifications. The main compromise is that magnetic sensors generally provide less immediate braking response compared to hydraulic or mechanical systems, but their weatherproof nature makes them valuable for outdoor use.
Pros:- Waterproof and weather-resistant
- Easy magnetic installation
- Reliable safety shutoff mechanism
- Compatible with most e-bikes
Cons:- Less immediate braking response than hydraulic systems
- Limited to magnetic sensing technology
- Requires proper measurement for fit
Best for: Outdoor e-bike enthusiasts needing a weatherproof, reliable safety sensor for daily riding
Not ideal for: High-performance or demanding terrain riders who require more stopping power and responsiveness
Our verdict“This sensor is ideal for riders seeking durable, weatherproof safety sensors for regular outdoor use.”
Z00M HB876E 2-PIN 4-Pistons Hydraulic Brake Set for eBike and Mountain Bikes
Mirroring the Zoom HB876E set, this 4-piston hydraulic brake kit offers increased stopping power and longer pad life thanks to its piston design. The inclusion of a detachable power-off sensor adds a safety layer, making it ideal for riders prioritizing maximum control. The 180mm discs provide better heat dissipation and consistent performance during long descents or aggressive riding. Compared to simpler 2-piston models, the 4-piston design enhances braking force, but the setup involves more complex installation, bleeding, and alignment, which can be a hurdle for beginners. This set fits well on high-performance e-bikes or mountain bikes used in demanding conditions, offering a premium combination of power, durability, and safety features.
Pros:- Enhanced stopping power with 4 pistons
- Long-lasting, durable brake discs
- Includes sensor control for added safety
- Smooth hydraulic operation
Cons:- Complex installation requiring proper bleeding
- Hose lengths may need customization for some bikes
Best for: Experienced riders or professionals needing maximum stopping power and durability for demanding mountain or e-bike riding
Not ideal for: Casual riders or those new to hydraulic brake installation, as setup and maintenance are more involved
- Number of Pistons:4
- Brake Disc Diameter:180mm
- Hose Length (Front):950mm
- Hose Length (Rear):1850mm
- Sensor:Detachable power-off sensor
- Material:Aluminum alloy levers, MT600 sintered metal discs
Our verdict“This premium brake set is best suited for experienced riders demanding maximum control and safety in challenging riding conditions.”
Electric Bike Brake Sensor with Waterproof Connector and Indicator Light
This brake sensor stands out for its robust waterproof connector and built-in indicator light, making it ideal for riders who need reliable safety features in all weather conditions. Compared with the EZ Bike Brake Sensor, which lacks an indicator light, this model offers easier monitoring of system status, but it remains limited to brake sensor functionality alone. Its waterproof connector ensures durability across rain and mud, making it a solid choice for commuters and touring enthusiasts. The installation is straightforward, and durability is high, yet its focus on just the brake cut-off feature might leave some riders wanting integrated control options. Overall, this pick suits those prioritizing weatherproof reliability and simple installation.
Pros:- Provides immediate power cut-off for enhanced safety
- Waterproof connector suitable for all weather conditions
- Easy to install and maintain
Cons:- Limited to brake sensor functionality only
- Compatibility may vary with different vehicle models
Best for: E-bike owners who ride in diverse weather conditions and need a dependable, easy-to-maintain safety sensor.
Not ideal for: Riders seeking an all-in-one control system or advanced features beyond basic brake safety.
- Connector Type:3 pin male waterproof connector
- Features:Indicator light
- Compatibility:E-bikes, e-scooters, electric motorcycles
Our verdict“This sensor is ideal for weatherproof, straightforward safety enhancement on e-bikes, especially in harsh conditions.”
Ebike Brake Sensor for Any Electric Bicycle, Cut Off Power Brakes 2/3 Pin 2A 2Y, Electric Bicycles Hydraulic Cut Off Power Brake Connector Kits(2 pins)
This model makes the most sense for riders who want a reliable, quick-response brake sensor compatible with multiple e-bike systems. Its highly sensitive sensor enhances control by cutting power instantly, similar to the PowerCut E-Bike Sensor, but with added emphasis on energy efficiency. The straightforward installation and broad compatibility make it suitable for DIY enthusiasts upgrading or customizing their bikes. However, compared with the waterproof, weather-resistant options like the Waterproof Brake Sensor with Indicator, this sensor’s durability in extreme weather might be less assured. Still, its focus on efficiency and responsiveness positions it well for daily commuters seeking simple yet effective safety upgrades.
Pros:- Highly sensitive and responsive brake detection
- Compatible with most e-bike models and systems
- Helps conserve battery life by reducing motor power during braking
Cons:- Lacks waterproof connector or weatherproof casing
- No detailed info on voltage compatibility or adjustable sensitivity
Best for: E-bike users looking for a versatile, responsive sensor that extends battery range and works across various models.
Not ideal for: Riders in extremely wet or muddy environments who need extra weatherproofing, as this sensor lacks a waterproof connector.
Our verdict“This sensor offers a great balance of responsiveness and efficiency for riders who prioritize performance across different e-bike setups.”
Electric Bike Brake Sensor Cable, 2-Pin Male, Safety Cut-Off Switch for E-Bike, Scooter, Motorcycle
This 2-pin brake sensor cable is designed for universal compatibility, making it a practical choice for riders who want a straightforward, plug-and-play safety upgrade. Compared to the Hydraulic Brake Cutoff Sensor, which is designed specifically for hydraulic systems, this cable covers a broader range of e-bike types, including scooters and motorcycles. Its durable plastic housing provides resistance to moisture and wear, but its simplicity means it lacks advanced features like indicator lights or weatherproof connectors. It’s a good, no-fuss option for those wanting quick installation and compatibility but might fall short for users seeking high-tech monitoring or weatherproofing.
Pros:- Easy to install with plug-and-play design
- Universal compatibility with various e-bike models
- Durable plastic housing resists moisture and wear
Cons:- Limited to 2-pin connector systems
- No detailed voltage compatibility info or adjustable features
Best for: E-bike and scooter owners who need an easy, universal safety cut-off sensor that can be installed quickly without specialized tools.
Not ideal for: Riders seeking weatherproof connectors or integrated indicator lights, as this cable offers basic functionality only.
- Compatibility:Universal 2-pin connector
- Functionality:Cuts power when brakes are applied
- Installation:Plug-and-play
- Construction:Durable plastic housing
Our verdict“This universal sensor cable is perfect for riders who want a simple, reliable safety cut-off solution without extra features.”
Cut Off Power Brake Sensor for E-Bike and Scooter
This brake sensor is a versatile choice for riders with hydraulic, mechanical disc, or V brakes, making it suitable for a wide range of e-bike and scooter setups. Compared to the Wireless Brake Sensor, which offers more advanced features, this wired sensor emphasizes simplicity and broad compatibility. Its easy installation and quick cutoff improve safety and control, but the lack of detailed compatibility with specific models or adjustable sensitivity could pose issues for some users. This sensor is best suited for those who value compatibility and quick response over advanced features or weatherproofing.
Pros:- Compatible with hydraulic, disc, V, and drum brakes
- Easy to install and use
- Enhances safety with quick system cutoff
Cons:- Limited to basic brake cutoff functionality
- No detailed list of compatible scooter or bike models
Best for: Owners of diverse brake systems seeking a straightforward safety upgrade with broad compatibility.
Not ideal for: Riders needing a weatherproof or wireless solution, as this sensor relies on a fixed cable connection.
- Compatibility:Hydraulic, mechanical disc, V, drum brakes
- Length:1500mm
Our verdict“This sensor suits riders with various brake setups who want a simple, reliable safety feature without extra bells and whistles.”
Ebike Brake Sensor, 2Pin & 3Pin Hydraulic Cut Off Power Brake for Electric Bicycles
This sensor combines high sensitivity with weather-resistant features, making it suitable for riders who want precise control in various conditions. Compared to the Basic 2-pin Brake Sensor, which might lack weatherproofing, this model’s flange mount and plastic construction help it withstand rain and dirt. Its compatibility with most e-bike models and energy-efficient operation make it appealing for daily commuters. However, the lack of adjustable sensitivity and limited detailed compatibility info could be drawbacks for those seeking fine-tuned control. Overall, this sensor offers a reliable safety upgrade for riders who prioritize accuracy and durability.
Pros:- Instantly cuts power for safety
- High sensitivity for precise control
- Weather-resistant and durable construction
- Easy to install on most e-bikes
Cons:- No adjustable sensitivity feature
- Limited detailed compatibility information
Best for: Commuters and casual riders needing a weather-resistant, high-sensitivity brake sensor for everyday use.
Not ideal for: Riders requiring adjustable sensitivity or detailed compatibility specifications for custom or high-end e-bikes.
- Mounting Type:Flange Mount
- Output Type:Analog
- Specific Uses:For use with electric bicycles
- Material Type:Plastic
- Style Name:Modern
- Item Dimensions:3.94 x 3.94 x 0.39 inches
Our verdict“This sensor is a reliable choice for daily riders who want durable, high-sensitivity braking safety in all weather conditions.”
E-Bike Brake Sensor with Indicator Light for Ebike Conversion Kit,One Pair 3Pin Ebike Power Cut Off Cable Compatible with Hydraulic Brake Lever, 1.2ft Length
This brake sensor stands out for its user-friendly plug-and-play design and clear visual indicators, making it a strong choice for those looking for quick installation and reliable performance. Compared to the Zoom eBike Hydraulic Brake Upgrade Kit, it offers a simpler, universal solution that fits various hydraulic and mechanical brakes without specialized tools. Its built-in indicator lights improve safety awareness, a feature absent in many basic sensors like the 2-Pin Waterproof EBike Brake Sensor. The tradeoff is that it relies on a 3-pin waterproof connector, which may not be compatible with all e-bike systems, requiring compatibility checks beforehand. This pick makes the most sense for riders who want a straightforward upgrade that clearly signals brake engagement and enhances safety without complex wiring.
Pros:- Simple, plug-and-play installation with waterproof connectors
- Clear indicator lights for brake status at a glance
- Compatible with a wide range of e-bike motor systems
Cons:- Limited to systems with 3-pin connectors, reducing compatibility with some setups
- Depends on proper matching with existing brake and motor systems, which may require additional checks
Best for: E-bike owners seeking an easy-to-install, universally compatible brake sensor with visual status indicators.
Not ideal for: Advanced DIY enthusiasts who prefer custom wiring or systems with non-standard connectors, as this sensor may not fit all configurations.
- Indicator Lights:Blue for normal, Red for cut-off
- Connector Type:3-pin waterproof male connector
- Length:1.2 feet
- Compatibility:Hydraulic and mechanical brakes, BAFANG, Tongsheng, hub motors
Our verdict“This sensor is ideal for riders who prioritize quick setup and clear safety signals on diverse e-bike systems.”
Ebike Brake Sensors for Electric Bicycles Hydraulic Cut Off Power Brake Connector (2A)
Compared with premium solutions like the Zoom eBike Hydraulic Brake Upgrade Kit, this sensor offers flexible pin configurations and cable lengths, making it suitable for a variety of e-bike models. It excels for users who want a reliable safety upgrade without paying for features they don’t need, such as pre-bled calipers or high-performance rotors. While its weather-resistant design and multiple pin options are advantages, it does require careful installation—incorrect pin configuration can lead to malfunction. For riders with specific electrical setups or limited space, this sensor provides a cost-effective, adaptable choice. However, it’s less suited for those seeking a plug-and-play experience or a complete brake upgrade kit.
Pros:- Multiple pin options (2 or 3 pins) for compatibility
- Various cable lengths (30cm or 150cm) for flexible routing
- Durable, weather-resistant construction for outdoor use
Cons:- Limited to specific electrical configurations, requiring proper wiring
- Installation complexity may be challenging for beginners
Best for: DIY e-bike owners who need adaptable pin configurations and longer cable options for custom setups.
Not ideal for: Riders seeking a fully integrated, ready-to-install brake system with minimal wiring adjustments, as this sensor demands careful setup.
- Pin options:2 or 3 pins
- Cable lengths:30cm or 150cm
- Material:High-quality plastic
- Application:Electric bicycles
Our verdict“This sensor offers excellent flexibility for custom setups but demands careful installation for optimal safety benefits.”
Zoom eBike Hydraulic Brake Upgrade Kit | 2/3 PIN Male Waterproof Power-Off Sensor Connector, Pre-Bled Brake Levers & Calipers with 160mm Rotors
This upgrade kit delivers a comprehensive solution with powerful dual-piston calipers and pre-bled hydraulic lines, making it ideal for riders who want a full brake system overhaul combined with safety features. Its automatic motor cut-off sensor ensures instant power disconnection when braking, similar to the E-Bike Brake Sensor with Indicator Light, but with added stopping power and durability. The included 160mm rotors and pre-bled calipers save installation time, especially compared to more basic sensors that require bleeding or system adjustments. The kit’s main tradeoff is its size and weight—it’s bulkier than simple sensors, which might limit compatibility with internal routing systems or compact frames. This makes it better suited for serious mountain bikers or those upgrading their entire braking system.
Pros:- Dual-piston calipers for enhanced braking power
- Pre-bled, ready-to-install hydraulic lines
- Includes 160mm rotors for improved stopping performance
- Automatic motor cut-off for safety
Cons:- Bulkier and heavier than sensor-only solutions
- Requires measurement and verification of connector type and rotor compatibility before order
Best for: Performance-focused riders seeking a complete, high-power brake upgrade with integrated safety cut-off features.
Not ideal for: Casual riders or those with compact or internal routing frames, as larger calipers and hoses may not fit well or require modifications.
- Connector type:2-pin or 3-pin waterproof
- Rotor size:160mm
- Hose length:Front: 950mm, Rear: 1850mm
- Bled:Pre-bled
- Caliper design:Left-side mounting
- Warranty:One year
Our verdict“This kit is perfect for riders wanting a complete hydraulic brake upgrade with safety features and increased stopping power, though it may be overkill for casual users.”
How We Picked
Our evaluation focused on key factors that matter most to e-bike owners: sensor responsiveness, build quality, ease of installation, waterproofing, and compatibility with common brake types. We prioritized products with clear reviews of consistent performance, especially in variable weather conditions, and those that offered straightforward installation for DIY enthusiasts. Products were ranked based on their overall reliability, value for money, and how well they fit a range of e-bike setups, from casual commuters to serious mountain bikers. This approach ensures that every pick addresses real rider needs and common tradeoffs, such as cost versus durability or simplicity versus advanced features.Factors to Consider When Choosing E Bike Brake Sensor Kit
Choosing the right e bike brake sensor kit involves understanding several critical factors that can influence safety, performance, and ease of use. Beyond just compatibility, riders should consider how weather resistance, installation complexity, and sensor responsiveness align with their riding style and environment. Investing in a high-quality kit can prevent accidents and simplify maintenance, but overpaying for features you don’t need can be a waste. This guide highlights the main considerations to help you make an informed decision that balances performance and value.Compatibility with Your E-Bike System
Not all brake sensor kits fit every e-bike model or brake type. Most kits specify whether they work with hydraulic, mechanical, or disc brakes. Ensuring compatibility prevents installation issues and guarantees proper sensor function. If your bike uses unique or proprietary brake setups, look for universal or adaptable kits. Failing to match your bike’s system can lead to poor sensor response or even safety hazards.Weatherproofing and Durability
Because e-bike riding often involves exposure to rain, mud, and dust, selecting a waterproof or weather-resistant sensor kit is crucial. Waterproof connectors, sealed cables, and corrosion-resistant components extend the lifespan and maintain reliable operation over time. Skipping this aspect risks sensor failure or false signals, especially for riders in climates with frequent rain or wet conditions.Ease of Installation and Maintenance
A kit with clear instructions, pre-bled components, and straightforward wiring reduces the time and effort needed for installation. Magnetic or wireless sensors tend to be simpler for DIYers, but may require periodic adjustments. Mechanical sensors might need more initial setup but often provide more consistent long-term performance. Consider your comfort level with bike modifications when choosing between complex and simple systems.Sensor Responsiveness and Safety Features
The primary purpose of these kits is to cut power or activate safety features when braking. Sensors with quick response times and reliable activation are essential for rider safety. Additional features like indicator lights can improve visibility, especially during night riding or in poor weather. Be wary of cheaper sensors that might delay response or trigger false alarms, which compromise safety.Cost and Overall Value
Higher-priced kits often include comprehensive features such as pre-bled calipers, waterproof connectors, and extended cables, which can save time and reduce frustration. Cheaper options may suffice for casual riding but might require extra maintenance or replacements down the line. Evaluate whether the added features align with your riding needs and budget to find the best balance of cost and performance.Frequently Asked Questions
Can I upgrade my existing e-bike brake system with a brake sensor kit?
Yes, most brake sensor kits are designed to be compatible with existing disc or hydraulic brake setups, making upgrades straightforward. However, it’s important to verify the specific connector type and whether your brake calipers are compatible with the sensor’s mounting system. Proper installation ensures reliable safety cut-offs and avoids potential damage to your bike’s electrical system.Are wireless brake sensors reliable in all weather conditions?
Wireless sensors are convenient and easy to install, but their reliability can vary depending on environmental interference and weather exposure. High-quality wireless kits with secure connections and weatherproof components tend to perform well, but in heavy rain or muddy conditions, wired sensors might offer more consistent responsiveness. Consider your typical riding environment when choosing between wired and wireless options.How do I know if a brake sensor kit is compatible with my hydraulic brakes?
Most hydraulic brake sensor kits specify compatibility with common hydraulic disc brakes and include the necessary connectors or adaptors. Check the pin configuration, cable length, and mounting options before purchasing. If your brakes use proprietary systems, look for universal or adjustable kits designed to fit a broad range of hydraulic setups, or consult the manufacturer for compatibility details.What maintenance is required for a brake sensor kit?
Routine checks involve inspecting cables, connectors, and sensors for corrosion, dirt, or damage. Keeping the sensors clean and dry ensures consistent operation. If your kit includes waterproof connectors, maintenance is minimal; otherwise, periodic re-sealing or cleaning might be necessary. Replacing worn or damaged components promptly maintains optimal safety and performance.Is it worth investing in a premium brake sensor kit for casual riding?
For casual riders, budget-friendly options can provide sufficient safety features, but premium kits often offer more durable materials, faster response times, and added safety indicators. If you frequently ride in wet or challenging conditions, investing in higher-quality components can improve reliability and reduce long-term maintenance. For infrequent riders, a mid-range kit usually balances performance and cost effectively.Conclusion
For riders seeking the best overall performance with reliable safety features, the Zoom HB876E Hydraulic Brake Set makes the most sense. Budget-conscious cyclists will appreciate the magnetic and waterproof sensor options for their simplicity and affordability. Serious enthusiasts or those riding in demanding weather should consider high-end kits with waterproof connectors and quick response times, like the Zoom eBike Hydraulic Brake Upgrade Kit. Beginners or casual riders are best served by straightforward, easy-to-install options that don’t compromise safety. Tailoring your choice to your riding style and environment ensures you get the most value and safety from your e-bike brake sensor kit.
