Product Introduction
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The Pressure Transmitter for Hydrogen Vehicles is a high-precision sensor engineered for the demanding requirements of fuel cell systems and hydrogen storage applications. It accurately converts gaseous or liquid hydrogen pressure signals into standard electrical outputs, providing critical data for system control and safety.
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Certified for intrinsic safety under the ATEX standard, the pressure transmitter operates reliably from -30 °C to 80 °C, ensuring stable performance across diverse climate conditions. Its core sensing element utilizes robust ceramic capacitive technology-when pressure is applied, the ceramic structure deforms, changing capacitance. This minute variation is precisely converted into a calibrated electrical signal via integrated high-accuracy signal conditioning circuitry, enabling exact hydrogen measurement and supporting the safe operation of the entire fuel cell system.
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Engineered to withstand the continuous vibration, shock, and media contamination typical of automotive environments, this Pressure Transmitter for Hydrogen Vehicles is well-suited for a wide range of industries, including hydrogen-powered vehicles, hydrogen storage, transport, and processing.
Features
Superior Media Compatibility
Featuring advanced Silicon-on-Sapphire sensor technology, the pressure transmitter delivers outstanding performance and long-term stability when measuring both gaseous and liquid hydrogen.
Rugust and Easy Integration
Designed for the demanding automotive environment, it operates reliably across a wide temperature range (-30°C to 80°C). Its compact form factor allows for installation in space-constrained areas, making it a versatile and durable solution for vehicle integration.
High-Precision Measurement
Provides highly accurate absolute pressure measurement from 100kPa to 35MPa, delivering the precise data required for optimal fuel cell control and efficiency.
Ensures System Safety
Built with a specialist high-strength titanium alloy sensor and tested to stringent standards like, this hydrogenpressure transmitter is engineered for inherent safety in hydrogen environments.
Specifications
| Measured Medium | Gases and liquids compatible with ceramic (e.g., hydrogen, oxygen) |
| Measuring Range | 0 ~ 100kPa,200kPa,500kPa,1MPa,2MPa,5MPa,10MPa,21MPa,35MPa |
| Supply Voltage | 5V DC |
| Output Signal | 0.5V ~ 4.5V DC,4~20mA |
| Operating Temperature | -30℃ ~ 80℃ |
| Pressure overload | 2FS |
| Explosive pressure | 3FS |
| Accuracy | ≤ ±2% FS |
| Explosive pressure | Ambient: -30 °C to +80 °C (-40 °F to +185 °F) / Media: -50 °C to +125 °C (-58 °F to +257 °F) |
| Electrical Interface | DJ7034Y-1.5-11 |
| Pressure Interface | M5 × 0.8 internal thread |
Application
This high-precision Hydrogen Pressure Transmitter for Electric Vehicles is a critical component across the entire hydrogen mobility ecosystem. Its robust design and accurate measurement capabilities make it indispensable in the following key areas:
Fuel Cell Electric Vehicle (FCEV) Systems
1. Anode Gas Supply Management: Precisely monitoring hydrogen pressure entering the fuel cell stack to ensure optimal reactant levels for the electrochemical reaction.
2. Recirculation Loop Pressure Control: Helping to manage the pressure of unspent hydrogen being recirculated, which is crucial for system efficiency and water management.
3. System Health and Safety Monitoring: Detecting abnormal pressure conditions that could indicate leaks or blockages, triggering safety protocols to protect the fuel cell stack.
On-Board Hydrogen Storage and Safety
1. High-Pressure Tank Monitoring: Continuously measuring the pressure within the Type III or Type IV hydrogen storage tanks to provide accurate fuel level information to the driver (range estimation).
2. Pressure Relief Device (PRD) Activation Support: Supplying the critical pressure data needed for the vehicle's safety system to activate thermal or mechanical pressure relief devices in case of a fire or over-pressure event.
3. Leak Detection Systems: Serving as a primary data source for the onboard leak detection system by monitoring for unexpected pressure drops in the storage and delivery lines.
Hydrogen Refueling Infrastructure
1. Vehicle-Communication Interface (VCI): The pressure and temperature data from this sensor are communicated to the refueling dispenser (as per SAE J2601 standards) to control the refueling rate and achieve a full fill without exceeding tank safety limits.
2. Onboard Pre-Fueling Safety Checks: Verifying system integrity by holding pressure before the refueling nozzle is connected.
Test, Validation, and Manufacturing
Beyond the vehicle itself, this sensor is used in the development and production of hydrogen systems.
1. Fuel Cell Stack and System Test Benches: Providing accurate pressure measurement for performance mapping, endurance testing, and efficiency validation during R&D and quality control.
2. Component Leak Testing Rigs: Used in the manufacturing process to verify the leak-tight integrity of valves, regulators, and pipework before assembly into the vehicle.
Kind Tips
To ensure optimal performance and longevity of your Hydrogen Pressure Transmitter for Electric Vehicles, please adhere to the following operational and safety guidelines.
•Operation & Installation
Conduct Pre-Installation Leak Tests: Before full system integration, a thorough leak test at the rated working pressure is mandatory. Using hydrogen and checking for bubbles with a surfactant for a sustained period (e.g., 3 minutes) verifies initial system integrity.
Adhere to Temperature Specifications: Ensure the transmitter operates within its specified temperature range of -30°C to 80°C to maintain accuracy and reliability under all vehicle operating conditions.
•Maintenance & Safety
Schedule Professional Servicing: Hydrogen systems require regular, specialized maintenance. Include inspections of the pressure transmitter, hydrogen tanks, valves, and lines for any signs of leakage or damage as part of the routine schedule.
Monitor for Pressure Fluctuations: The vehicle's system controller relies on stable pressure readings. Significant deviations from set points may trigger safety shutdowns. Ensuring your transmitter provides stable and accurate data is crucial for continuous operation.
•Transport & Storage
Handle with Care During Transport: If the transmitter or associated equipment contains any fluids, ensure they are drained prior to shipping to prevent internal corrosion and permanent damage.
Prepare Systems for Long-Term Storage: For vehicles or systems taken out of service, it is recommended to evacuate the hydrogen lines and store the system sealed and dry. Hydrogen storage tanks must be maintained at a specified minimum pressure as per safety regulations.
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