Purpose

This QG201 warning air pressure sensor is a professional spare part developed by Harbin VITI Automotive Electronics, specially used for city buses and coaches. It can collect real-time air pressure data of the vehicle air brake system and transmit pressure signals to the vehicle instrument and controller. When the air pressure is lower than the safe threshold, it will trigger an alarm reminder to prevent safety hazards such as insufficient braking force, ensuring safe operation of the bus.

Product Features

1. Adopt high-precision pressure sensing element, sensitive pressure induction and accurate signal feedback.

2. Galvanized metal housing with anti-rust treatment, equipped with brass fine threaded connector for good sealing.

3. Double insulated terminal post structure, stable wiring, effectively avoiding poor contact.

4. Reach IP54 protection grade, resistant to splash water, dust and oil pollution.

5. Fine threaded screw-in installation structure, compact overall size, easy to arrange in narrow chassis space.

6. Adopt wear-resistant internal structure, adapt to long-term vibration environment of bus chassis.

Product Advantages

1. Original VITI quality: Genuine Harbin VITI product, model QG201, perfectly matching bus original equipment.

2. Wide applicability: Suitable for various types of city buses and coaches, convenient for after-sales replacement and maintenance.

3. Long service life: Anti-corrosion, anti-vibration and anti-aging design, stable performance under harsh working conditions.

4. Low failure rate: Signal transmission is stable, not easy to generate false alarms or signal loss.

5. Convenient maintenance: Simple disassembly and assembly, effectively shorten vehicle maintenance working hours.

6. Reliable packaging: Neutral independent carton packaging with shockproof foam inside to prevent damage during transportation.

Installation Steps

1. Shut down the engine, cut off the whole vehicle power supply, and wait for the air circuit pressure to be released completely.

2. Prepare the suitable sealing washer and installation tool, remove the old air pressure sensor from the mounting base.

3. Clean the dirt, residual oil and impurities on the threaded hole of the mounting base.

4. Install the sealing washer on the new QG201 sensor, align the fine thread with the mounting hole, screw it in manually first, then tighten moderately with a tool. Do not apply excessive torque.

5. Connect the wiring harness to the two terminal posts of the sensor, confirm firm connection without looseness.

6. Turn on the vehicle power supply, start the engine, build up air pressure, check whether the air pressure display on the instrument is normal and whether there is air leakage at the threaded joint.

Notes

1. Installation must be carried out after the engine is shut down, power is cut off and air pressure is fully released, to prevent air injection injury.

2. Do not bend, knock or drop the sensor before installation, collision will damage the internal precision sensing element.

3. Avoid over-tightening the thread, excessive force will cause thread slipping, shell cracking and air leakage.

4. Confirm the wiring terminals are firmly connected. Loose wiring will lead to abnormal signal and false alarm of the whole vehicle system.

5. It is forbidden to modify the internal structure of the sensor privately once damaged; replace the whole sensor directly.

6. Regularly check the sensor and sealing washer during vehicle maintenance to prevent air leakage and aging failure.

7. Store the spare sensor in a dry and ventilated environment, keep away from corrosive liquid and humid air.