| Parameter | Specification |
|---|---|
| Sensor Type | HVAC Pressure and Temperature Composite Sensor (P+T) |
| Technology | Ceramic Capacitive Sensing |
| Pressure Range | 0–3400 kPaG (customizable) |
| Temperature Range | -40°C to +125°C |
| Pressure Accuracy | ±2.0% FS (10°C–85°C), ±3% FS (-40°C–125°C) |
| Temperature Accuracy | ±1.0°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) | 100nF ~ 470nF |
| Output Load (Resistive) | Min 4.7kΩ |
| Short Circuit Protection | Yes |
| Supply Current | ≤10 mA |
| Cycling Test | 200,000 cycles |
| Housing Material | Aluminum alloy / Copper / Steel |
| Protection Rating | IP67 |
| Mounting Interface | Threaded connection, custom connector available |
| Dimensions | Compact design, optimized for tight HVAC routing spaces |
| Compliance | RoHS, REACH, ISO 7637-2 |
The Automotive HVAC Pressure and Temperature Composite Sensor (P+T) is a next-generation integrated sensing solution designed for modern vehicle air conditioning systems, combining precise pressure and temperature measurement in a single compact unit. Installed directly on the refrigerant piping of the HVAC system—typically on the high-pressure side of the condenser or evaporator—the sensor simultaneously monitors both the absolute pressure of the refrigerant and its ambient temperature. This dual-input capability enables the vehicle’s electronic control unit (ECU) to calculate real-time refrigerant density, optimize compressor operation, prevent overpressure conditions, and enhance overall cooling efficiency while ensuring passenger comfort and system longevity.
Unlike traditional separate sensors, this P+T composite design reduces wiring complexity, improves signal synchronization, and lowers total system cost without compromising accuracy. The sensor utilizes advanced ceramic capacitive sensing technology, which offers superior long-term stability, excellent resistance to moisture and chemical degradation, and minimal drift over time—critical for maintaining performance across thousands of operational cycles. It features intelligent zero-point and temperature compensation algorithms that automatically correct for thermal drift and environmental variations, ensuring consistent accuracy across a wide operating range of -40°C to +125°C. With ±2.0% full-scale accuracy for pressure and ±1.0°C for temperature, it delivers industry-leading precision for diagnostic and control applications.
The sensor includes comprehensive protection mechanisms: overvoltage (18V DC), reverse polarity (-14V DC), short-circuit resistance, and burst pressure tolerance of 3×P max, ensuring reliable operation in harsh under-hood environments. Its IP67-rated housing provides complete sealing against moisture, dust, and refrigerant leaks, making it suitable for use in gasoline, diesel, and hybrid vehicles. The compact size and modular design support easy installation and integration into diverse HVAC 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.
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