Commercial Vehicle Air Brake Pressure Sensor

High-precision MEMS-based sensor for real-time monitoring of air brake system pressure, ensuring safe and reliable braking performance in heavy-duty commercial vehicles.

Pressure Range	Accuracy	Protection Level
0–1200 kPa	±1.5% FS	IP67

Categories: Vehicle Engineering, Intelligent Driving System, Vehicle Sensor Brand: Dowway

Description
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Parameter	Specification
Sensor Type	Commercial Vehicle Air Brake Pressure Sensor
Technology	MEMS-based pressure transducer
Pressure Range	0–1200 kPa (customizable)
Accuracy	±1.5% FS (-40°C to +125°C)
Operating Temperature	-40°C to +125°C
Storage Temperature	-40°C to +130°C
Output Signal	0.4–4.65V or 0.5–4.5V (configurable)
Supply Voltage	4.75–5.25 VDC
Overvoltage Protection	18 VDC
Reverse Polarity Protection	-14 VDC
Burst Pressure	3×P max
Overpressure Tolerance	2×P max
Output Load (Capacitive)	Max 470nF
Output Load (Resistive)	Min 4.7kΩ
Short Circuit Protection	Yes
Supply Current	≤10 mA
Cycling Test	200,000 cycles
Housing Material	Aluminum alloy / Steel
Protection Rating	IP67
Mounting Interface	Threaded connection, custom connector available
Dimensions	Compact design, optimized for tight engine bay spaces
Compliance	RoHS, REACH, ISO 7637-2

The Commercial Vehicle Air Brake Pressure Sensor is a critical safety component designed for heavy-duty commercial vehicles such as trucks, buses, and trailers, where reliable air brake systems are essential for vehicle control and occupant safety. Installed directly on the air reservoir or accumulator tank of the pneumatic braking system, this sensor continuously monitors the pressure within the compressed air supply and converts it into an accurate electrical signal transmitted to the vehicle’s electronic control unit (ECU). This data enables real-time assessment of brake system health, early detection of air leaks, low-pressure conditions, or compressor failure—critical for preventing accidents and ensuring compliance with commercial vehicle safety regulations.

Utilizing advanced MEMS (Micro-Electro-Mechanical Systems) technology, this sensor delivers high accuracy, long-term stability, and exceptional durability under extreme operating conditions typical of commercial fleets. It maintains ±1.5% full-scale accuracy across a wide temperature range (-40°C to +125°C), ensuring consistent performance in harsh environments including desert heat, Arctic cold, and high-humidity regions. The intelligent zero-point and temperature compensation algorithms automatically correct for thermal drift and environmental variations, minimizing measurement errors over time. With excellent EMC/ESD performance, it resists electromagnetic interference and electrostatic discharge common in complex vehicle electrical systems, ensuring

stable signal transmission even in high-noise conditions.

The sensor features comprehensive protection mechanisms: overvoltage (18V DC), reverse polarity (-14V DC), short-circuit resistance, and burst pressure tolerance of 3×P max, ensuring durability in demanding applications. Its IP67-rated housing provides complete sealing against moisture, dust, oil, and road debris, making it ideal for use in under-hood and under-chassis locations exposed to vibration, shock, and chemical exposure. The compact size and modular design allow for easy integration into existing brake system architectures, with customizable options for pressure range, output signal (0.4–4.65V or 0.5–4.5V), and physical dimensions to meet OEM-specific requirements.