Fuel Cell Hydrogen Concentration Sensor OHS1-01 MEMS Catalytic Combustion Fast Response Anti-Poison

Fuel Cell Hydrogen Concentration Sensor OHS1-01 Automotive-Grade Design MEMS Catalytic Combustion Fast Response Anti-Poisoning for Fuel Cell Engines and Hydrogen Storage Systems Hydrogen Leak Detection

Quick Detail:

• Hydrogen concentration sensor developed for proton exchange membrane fuel cell (PEMFC) vehicles and hydrogen storage systems
• Core function: real-time detection of ambient hydrogen concentration to prevent explosion accidents caused by hydrogen leakage
• Uses a MEMS technology catalytic combustion sensor with diffusion sampling
• Measuring range: 0%~4% vol (0~40000ppm); Measuring accuracy: +/-5% F.S
• Response time: T90 <2s; Startup time <0.5s
• Working voltage: 9~36V DC (compatible with 12V/24V systems)
• Signal output: 0.5~4.5V analog voltage; Power consumption: about 500mW (about 1/10 of a traditional catalytic combustion sensor)
• Working temperature: -40C ~ 85C; Protection class: IP67; Service life: >2 years
• Automotive-grade design and chip, meeting the vehicle electromagnetic environment
• Anti HMDS, H2S, SO2 poisoning; Equipped with self-test function

Description:

Hydrogen is a flammable and explosive gas; in fuel cell vehicles and hydrogen storage systems, hydrogen leakage is the biggest safety hazard. The hydrogen concentration sensor is a core component ensuring the hydrogen safety of fuel cell vehicles. The OHS1-01 hydrogen concentration sensor is designed precisely for this, used to detect ambient hydrogen concentration in real time and to give a timely alarm when the concentration exceeds the standard, preventing explosion accidents.

The OHS1-01 uses a catalytic combustion sensor manufactured with MEMS technology. By catalytically combusting hydrogen on the surface of a platinum resistor, the temperature and thus the resistance of the platinum resistor change, and this change is used to measure the hydrogen concentration. The sensor has an extremely fast response speed and ultra-low power consumption, can accurately and reliably detect hydrogen in high and low temperature environments, is not affected by CO interference, and has a detection lower limit as low as 1000ppm. Core highlights include:

Automotive-grade design: uses an automotive-grade chip design, compact structure, meeting the requirements of the vehicle electromagnetic environment. Fully sealed structure with protection class IP67, able to operate stably for a long time in harsh vehicle environments.

Fast response and high accuracy: response time T90 <2s, startup time <0.5s, much faster than similar products. Linearity error less than 1%, measuring accuracy +/-5% F.S, able to quickly capture any hydrogen leakage.

Ultra-low power consumption: power consumption only about 500mW, about 1/10 of a traditional catalytic combustion sensor. The extremely small power consumption and continuously stable working duration are especially suitable for the application needs of fuel cell vehicles.

Anti-poisoning capability: capable of resisting HMDS, H2S and SO2 poisoning, maintaining stable performance in complex gas environments and extending sensor service life.

Wide temperature range and high reliability: working temperature range -40C~85C, storage temperature -40C~105C. It can accurately and reliably detect hydrogen in both high and low temperature environments. It is insensitive to temperature and humidity, meeting use at 95% humidity.

Self-test function: equipped with a self-test function; when the internal detection function of the sensor fails, the output voltage is 0.2V, making it easy for the system to judge the working state of the sensor.

The OHS1-01 output voltage is linearly related to the hydrogen concentration: the 0%~4% vol concentration range corresponds to 0.5V~4.5V output; above 4% vol the output is 4.5V. The product size is only 60 x 59.7 x 14.5 (mm) and the weight is about 30g, with a compact structure convenient for flexible arrangement on the vehicle body.

Specifications:

Electrical / Optical Characteristics (Ta=25C +/-3C). See product specification image.

Applications:

This product is widely used in hydrogen leakage detection of various proton exchange membrane fuel cell (PEMFC) systems and hydrogen storage systems, specifically including:

• Hydrogen fuel commercial vehicles (heavy trucks, city buses, logistics vehicles, cold-chain logistics vehicles)
• Hydrogen fuel passenger vehicles (sedans, SUVs)
• Stationary fuel cell power stations (backup power, distributed energy systems)
• Hydrogen refueling stations (hydrogen leakage detection)
• Chemical plants (hydrogen leakage detection)
• Hydrogen storage systems (hydrogen leakage detection in cylinders and piping)

Typical installation position: because the specific gravity of hydrogen is low, the sensor must be installed directly above the detection point with the probe sampling port facing down. A recommended quantity of 3 is used: above the hydrogen cylinder, above the pressure reducing valve and above the fuel cell system.

Company Advantages:

Shanghai Yibaijia Hydrogen Energy Technology Co., Ltd., as a professional hydrogen energy parts supply platform, distributes the OHS1-01 hydrogen concentration sensor dedicated to fuel cells. The OHS1-01 uses MEMS catalytic combustion technology, automotive-grade design, response time T90 <2s, power consumption only about 500mW, measuring range 0%~4% vol, protection class IP67 and working temperature covering -40C~85C. The company team has more than 10 years of experience in the hydrogen energy and sensor industry and can provide full-process technical support from product selection and system matching to installation.

FAQ

Q1: Can you provide samples for testing?
A: Yes, we support sample orders for vehicle installation testing and performance verification, and also accept mixed-model sample orders.

Q2: What is the delivery lead time?
A: Sample orders usually take 5-7 working days; bulk orders (depending on order quantity) generally take 15-30 working days.

Q3: Is there a minimum order quantity (MOQ) limit?
A: 10-piece sample trial orders are supported, and bulk order prices are more favorable.

Q4: Why does a fuel cell system need a hydrogen concentration sensor?
A: Hydrogen is a flammable and explosive gas, and there is a risk of hydrogen leakage in fuel cell vehicles and hydrogen storage systems. The core function of the hydrogen concentration sensor is to detect the ambient hydrogen concentration in real time and prevent explosion accidents caused by hydrogen leakage. Taking a hydrogen fuel cell vehicle as an example, generally 3~5 hydrogen detection modules need to be configured.

Q5: What is the measuring principle of the OHS1-01?
A: The OHS1-01 uses a catalytic combustion sensor manufactured with MEMS technology. By catalytically combusting hydrogen on the surface of a platinum resistor, the temperature and thus the resistance change, and this change is used to measure the hydrogen concentration.

Q6: How fast is the response of the OHS1-01?
A: Response time T90 <2s, startup time <0.5s, able to respond quickly to any hydrogen leakage.

Q7: What is the power consumption of the OHS1-01?
A: Power consumption about 500mW, about 1/10 of a traditional catalytic combustion sensor.

Q8: What are the installation position requirements?
A: Because the specific gravity of hydrogen is low, the sensor must be installed directly above the detection point with the probe sampling port facing down. It is recommended to install it above the hydrogen cylinder, above the pressure reducing valve and above the fuel cell stack.

Q9: How to handle product failures?
A: We implement a strict quality control system, with an out-of-factory defect rate below 0.2%. During the warranty period, small batches of defective products will be replaced with new ones in the next order; batch quality problems will be negotiated for repair or replacement to ensure customer rights.