Product Description
Detecting whether the hydraulic brake lever is "active" or "deactivated" has always been a challenging problem for electric bicycles. Now, with the advent of the BK-2R sensor, this problem has been completely solved.
The sensor consists of two parts: a main sensor and a small magnet, both of which are very compact.
Simply attach these two parts to the brake lever, and the system can accurately detect the brake's active or deactivated state, outputting the corresponding on/off signal.
Specification
Model | BK-2R |
Signal | Active:switch off |
Housing material | Intensive ABS |
Sensor Size | 26x11.5x6mm |
Magnet Size | Φ10x3mm |
Net Weight | 4g |
Appearance and size
Installation Guide
Packing list
Sensor ×1
Magnet ×1
3M Tape ×2
Interface
Connector: SM2 or others
How to order
Before placing your order, please be sure to specify the following:
—Model and quantity
—Connector type
—Cable length
—Other special requirements
BK-2R Power-off Brake Sensor – Reliable Protection When Power Drops Unexpectedly
In industrial automation, the most dangerous moment is often not when a machine is running, but when power suddenly disappears. That’s when braking systems must react instantly. The BK-2R power-off brake sensor is built exactly for this situation.
I’ve seen many systems fail simply because the brake signal came too late. This sensor solves that problem by detecting power loss immediately and sending a stable brake control signal without delay.
It is widely used in CNC machines, elevators, conveyors, robotics, and any system where controlled stopping is critical for safety.
The BK-2R sensor is a safety control device designed to monitor electrical power status and trigger braking when power is lost. It acts as a bridge between electrical failure and mechanical safety response.
Its job is simple but extremely important: make sure machines stop safely when power disappears.
Detects sudden power failure
Triggers brake activation signal
Supports industrial safety control systems
Prevents uncontrolled machine movement
The working principle is based on real-time voltage monitoring. When the system is powered normally, the sensor stays in standby mode. When voltage drops below a safe threshold, it immediately switches output state and activates the brake signal.
This reaction happens in milliseconds, which is critical for high-speed industrial equipment.
| Status | Sensor Behavior | System Response |
|---|---|---|
| Normal Power | Monitoring mode | Machine runs normally |
| Voltage Drop | Pre-alert detection | Signal ready state |
| Power Failure | Instant trigger | Brake activated |
| Recovery | Reset monitoring | System restarts safely |
Source: Internal Control Logic & Industrial Safety Testing Data – Suzhou Minshine Electronics Co., Ltd.
When machines are moving and power suddenly cuts off, inertia keeps them running. Without braking control, this can cause damage or safety hazards.
BK-2R ensures that braking happens at the exact moment power is lost, not after.
Prevents uncontrolled machine motion
Reduces mechanical damage risk
Improves operator safety
Supports emergency shutdown systems
This sensor is designed for real industrial environments, not lab conditions. That means vibration, dust, heat, and electrical noise are all considered in its design.
Instant detection of power loss ensures immediate braking action.
Maintains consistent performance under unstable voltage conditions.
Works reliably even in noisy electrical environments.
Built for continuous industrial operation.
| Feature | BK-2R Sensor | Standard Sensor |
|---|---|---|
| Response Speed | Ultra Fast | Medium |
| Safety Level | Industrial Grade Protection | Basic Protection |
| Signal Stability | High | Average |
| Anti-Interference | Strong | Limited |
| Durability | Long-term Industrial Use | Standard |
Source: Internal Benchmark Testing Report – Suzhou Minshine Electronics Co., Ltd.
This sensor is used wherever controlled braking is required during power failure.
CNC machining systems
Elevators and lifting systems
Industrial conveyors
Robotic automation equipment
Packaging production lines
Motor control systems
Safety shutdown systems
Each BK-2R sensor goes through strict production steps to ensure consistency and reliability.
Component inspection
Circuit assembly
Signal calibration
Temperature testing
Vibration testing
Final functional inspection
We test every unit before shipment to ensure it performs correctly in real industrial conditions.
Industrial Sensors must survive long-distance shipping, so we use multi-layer protection.
Anti-static protective bag
Foam cushioning layer
Reinforced inner support
Export-grade carton box
| Item | Specification |
|---|---|
| Production Time | 7–20 Working Days |
| Shipping Methods | Express / Air / Sea / Rail |
| Payment Terms | T/T, Wire Transfer, Negotiable |
| Packaging | Anti-static + Foam + Carton |
Source: Internal Export & Logistics Records – Suzhou Minshine Electronics Co., Ltd.
Since 2003, we have focused on Industrial Controllers, sensors, and display systems. Over the years, we learned that reliability is more important than specification numbers.
20+ years manufacturing experience
Stable OEM/ODM support
Strict inspection process
Fast engineering response
Global shipping experience
It is used in CNC machines, elevators, conveyors, robotics, and industrial safety systems.
The sensor immediately sends a brake signal to activate emergency stopping.
Yes, wiring, connectors, and mounting options can be customized.
Yes, it is designed for vibration, temperature variation, and electrical noise.
The BK-2R power-off brake sensor is a small but essential part of industrial safety systems. It ensures machines stop correctly when power is lost, helping protect both equipment and operators.
In real production environments, this kind of reliability is not optional—it is necessary.
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