1. Key Technical Specifications Measuring medium: DOT3, DOT4 brake fluid Measuring range: Standard 0–10MPa, customized ranges available Wetted material: Integrated 17-4PH stainless steel diaphragm Operating temperature: -40℃ ~ +140℃ with full zero and span temperature compensation Measurement accuracy: ±0.4%FS ~ ±1.2%FS Safe overload: 3 times full scale; burst pressure reaches 8 times rated pressure Response time: ≤7ms ultra-fast dynamic pressure response Protection grade: IP67, resistant to brake fluid corrosion, dust and water Supply voltage: Standard 5VDC automotive power supply Output signal: 0–5V analog signal or I2C digital signal Vibration resistance: 10–25g, adaptable to bumpy vehicle driving environments Service lifespan: Over 5 million pressure cycle tests with excellent long-term stability 2. Core Function Collect instantaneous brake fluid pressure when the brake pedal is depressed and transmit real-time pressure data to ABS/ESP ECU. Provide pressure reference for anti-lock braking, electronic stability program and AEB automatic emergency braking to dynamically adjust wheel braking force. Detect pressure deviation of dual brake circuits; activate instrument brake fault warning if pipeline leakage or single-circuit pressure loss happens. Adopt oil-free and gasket-free micro-fused all-metal structure to eliminate medium leakage risks, keeping stable measurement under frequent brake impact and high working temperature. Equipped with reverse connection, short-circuit and EMC anti-interference protection; built-in self-diagnosis module identifies circuit faults and abnormal pressure, and stores corresponding DTC fault codes. 3. Working Principle This sensor adopts glass micro-fused silicon piezoresistive sensing technology: Hydraulic pressure of brake fluid directly acts on the solid stainless steel diaphragm and produces tiny elastic deformation. Silicon strain gauges permanently fused on the diaphragm generate linear resistance changes proportional to brake pressure. The built-in Wheatstone bridge converts resistance fluctuations into weak voltage signals. The internal ASIC chip realizes temperature compensation, signal amplification and filtering, and outputs stable electrical signals to the vehicle brake control unit. 4. Application Scope Vehicle Types Fuel passenger cars, SUVs, MPVs, new energy electric vehicles and light commercial vehicles equipped with ABS, ESP and AEB systems Matching Components Brake master cylinder assemblies, ABS hydraulic control units, new energy vehicle regenerative braking systems Application Scenarios Vehicle active safety braking control, real-time status monitoring of brake systems, intelligent driving auxiliary braking systems