Product Specification

YD31-002 Multi-Vehicle Tire Air Pressure Gauge with Inflation Gun Webpage Detail Page (English)

I. Product Specifications (SPECIFICATION)

1. Core Parameter Summary Table

2. General Basic Parameters

II. Product Details (PRODUCT DETAILS)

1. Short-Hose Portability + Integrated Measurement & Inflation, More Efficient Emergency Maintenance

(1) 330mm Short-Hose Design, No Storage Pressure

• Ultimate Portability: The overall length is only 150mm (including gun body + short hose), and the weight is only 280g (equivalent to the weight of a mobile phone). It can be easily placed in jeans pockets, small tool bags, or motorcycle front storage compartments, and is readily available when going out, without worrying about long-hose tangling or knotting;
• No Redundant Operations: The short hose reduces gas transmission loss. During inflation, gas directly reaches the tire, avoiding tire pressure detection deviations caused by gas residue in long hoses. It is especially suitable for small-displacement air compressors (such as 12V on-board air compressors), and the inflation efficiency is 20% higher than that of long-hose products.

(2) Copper Movement + Dual-Unit Scale, Accurate Pressure Measurement Without Errors

• High-Precision Detection: The copper movement has an error of ≤±0.025 bar within the daily tire pressure range of 0-10 bar. For example, when the standard tire pressure of a car is 2.5 bar, the measurement accuracy far exceeds the industry average, ensuring reliable tire pressure data and avoiding tire uneven wear and increased fuel consumption caused by incorrect tire pressure;
• Rapid Reading: The 60mm large dial is equipped with high-contrast scales (black background + white characters), displaying both bar and psi units simultaneously. Whether in strong light or dim environments (such as garage corners), the value can be read quickly within 1 second, making it easy for the elderly and beginners to operate.

2. Durable Materials + Flexible Adaptation, Low Long-Term Usage Cost

(1) Rugged Structure, Suitable for High-Frequency Use

• Impact-Resistant Gun Body: The zinc alloy gun body can withstand impact from a 1-meter height (concrete floor) without deformation or cracking, suitable for high-frequency use scenarios such as car beauty shops and repair stations. Its service life is 3 times that of plastic gun bodies;
• Durable Sealing: The rubber sealing gasket of the gun nozzle is made of oil-resistant nitrile rubber. It still maintains good sealing performance after 500 repeated insertions and removals without air leakage, eliminating the need for frequent replacement of seals;
• Wear-Resistant Short Hose: The surface of the PVC short hose is coated with a wear-resistant layer to avoid scratches and damage caused by friction with other tools during storage. Even if it comes into contact with oil stains during daily use, it can be cleaned by wiping with a rag, requiring simple maintenance.

(2) Multi-Vehicle + Multi-Air Source, Wide Adaptation Range

• No Vehicle Restrictions: By replacing the sealing gasket (2 spare gaskets included), the gun nozzle can be adapted to American valve stems (cars), mixed valve stems (motorcycles), and French valve stems (bicycles). No separate tools need to be purchased for different vehicles;
• Easy Air Source Adaptation: The default G1/4" interface can be connected to on-board air compressors and small portable air sources. After replacing the interface, it can also be adapted to household air compressors. Whether for home maintenance or outdoor emergencies, a matching air source can be found.

3. Humanized Details + Emergency Adaptation, More Convenient to Use

(1) Labor-Saving Operation, Completed Easily by One Person

• Lightweight Design: The 280g lightweight gun body causes no burden during hand-held operation. Even when measuring the pressure of multiple tires continuously for a long time, there is no hand soreness;
• Labor-Saving Switch: The push-type inflation switch only requires 4N of force (equivalent to lifting a 0.4kg object), which can be easily controlled by female users and the elderly. The inflation process can be paused at any time, ensuring flexible operation.

(2) Emergency Features, Adapted to Unexpected Scenarios

• Air-Source-Free Emergency: Even without connecting to an air source, it can be used alone as a tire pressure gauge. The tire pressure can be quickly detected before daily commuting to identify abnormal tire pressure in advance;
• Compact Storage: The short hose can be directly attached to the gun body for storage. The overall volume is equivalent to a power bank, which can be placed in a carry-on backpack or car armrest box without taking up space. In case of unexpected tire pressure loss (such as a puncture on the road), it can be quickly taken out for maintenance.

III. Application Scenarios (APPLICATION SCENARIOS)

1. Emergency Maintenance for Daily Commuting Car Owners (Core Scenario)

1. Take Out the Tool: Take YD31-002 from the armrest box, connect it to the on-board air compressor directly without arranging a long hose;
2. Rapid Pressure Measurement: Align the gun nozzle with the car tire valve stem, press to seal, and read the dial showing 2.0 bar, confirming insufficient tire pressure;
3. Precise Inflation: Press the switch to inflate for 15 seconds, release the switch to check that the tire pressure rises to 2.4 bar, then stop inflating;
4. Store the Tool: Disconnect the air source, attach the short hose to the gun body, and place it back into the armrest box. The entire process takes less than 1 minute.
   Result: No need to go to a repair shop, emergency inflation can be completed before commuting. The short-hose design perfectly fits the narrow space of the armrest box, avoiding the problem of difficult storage of long-hose tools and ensuring commuting safety.

2. Carry-On Maintenance for Short-Distance Cycling Enthusiasts (Scenario 2)

1. Replace the Interface: Use a special wrench to replace the G1/4" interface of YD31-002 with a G3/8" interface, and connect it to the mini air compressor;
2. Tire Pressure Detection: Adapt the gun nozzle to the bicycle’s French valve stem, press to seal, and read the tire pressure as 6.5 bar, confirming the need for inflation;
3. Short-Distance Inflation: Press the switch to inflate slowly. Due to the short hose with no gas residue, check the tire pressure every 5 seconds until it rises to 8 bar;
4. Carry-On Storage: After disconnecting, place the tool into the side pocket of the backpack without taking up space for riding gear, and no tool rattling during the ride.
   Result: It solves the problem that traditional long-hose tools cannot fit into backpacks, enabling emergency tire pressure maintenance during rides and avoiding reduced riding efficiency or tire blowouts caused by insufficient tire pressure.

3. Rapid Service at Car Beauty Shops (Scenario 3)

1. Batch Preparation: Connect multiple YD31-002 units to the small air compressor at the work station (G1/4" interface) and place them neatly on the tool cart shelf;
2. Rapid Service: Staff hold the tool and complete tire pressure detection for 4 tires of one car within 10 seconds. If insufficient tire pressure is found, directly press to inflate to the standard value (e.g., 2.5 bar);
3. Convenient Storage: After the service, place the tool back on the shelf directly. The short-hose design avoids tangling between tools and saves storage time.
   Result: The service time per car is reduced from 5 minutes to 2 minutes, improving the store’s service efficiency. The short-hose + lightweight design reduces staff operation fatigue, adapting to high-frequency service scenarios.

IV. Frequently Asked Questions (FAQ)

Q1: Will the short-hose design affect inflation efficiency? Is there a gap compared with long-hose products?

1. Less Gas Residue: The gas residue in the 330mm short hose is only 1/3 of that in long hoses. After inflation, release the switch to quickly read the real tire pressure, avoiding "false high tire pressure" caused by gas residue in long hoses;
2. More Flexible Operation: During short-distance inflation (e.g., the vehicle is parked next to the air compressor), the short hose can be used directly without arrangement, reducing the trouble of long-hose dragging and tangling. It is especially suitable for narrow workstations (such as garage corners), and the overall operation efficiency is 15% higher than that of long-hose products;
3. Different Adaptation Scenarios: Long hoses are suitable for long-distance inflation (e.g., large repair shops), while short hoses are suitable for short-distance and emergency scenarios. Inflation speed is only related to air source pressure, not directly related to hose length. Under daily 0-15 bar inflation needs, the efficiency of the two is the same.

Q2: The hose is too short to reach the valve stem of the inner tire of the vehicle. What should I do?

1. Accessory Expansion: Contact the merchant to purchase a dedicated hose extension adapter (length options: 500mm/1000mm). Connect the extension adapter between the gun nozzle and the valve stem to increase the operating distance without affecting measurement accuracy;
2. Operation Adjustment: For inner tires, slightly turn the vehicle (e.g., turn the steering wheel outward) to face the valve stem outward, then operate with the short-hose tool. Most family cars can easily access the valve stem after steering, without additional accessories.

Q3: After long-term use, the gun nozzle sealing gasket ages and leaks air. How to replace it?

1. Accessory Preparation: Purchase original adaptable rubber sealing gaskets (it is recommended to buy 5-10 at a time for spare use). The sealing gasket specifications are 8mm in diameter and 3mm in thickness, compatible with most valve stems;
2. Replacement Steps: ①Gently pry out the old sealing gasket in the gun nozzle with a small screwdriver; ②Place the new sealing gasket into the gun nozzle groove and press it with your finger until it fits completely; ③After installation, test the sealing effect (align with the valve stem and press, no air leakage sound indicates normal use);
3. Maintenance Suggestion: Check the sealing gasket for deformation and cracks after every 30 uses. Replace it in time if problems are found to avoid tire pressure detection deviations caused by poor sealing.

Q4: The dial pointer does not return to zero. Is it necessary to send it back to the factory for repair?

1. Deviation Judgment: If the pointer deviation from zero is ≤0.1 bar (e.g., stopping at 0.05 bar), subtract the deviation value from the reading during measurement (e.g., if the displayed value is 2.55 bar, the actual tire pressure is 2.5 bar), which does not affect daily use;
2. Adjustment Method: ①Open the calibration screw cover on the back of the dial with a flat-head screwdriver; ②Gently turn the pointer shaft with a small screwdriver to adjust the pointer to the zero position; ③After adjustment, verify with a standard tire pressure device (e.g., compare with a professional tire pressure gauge) to ensure the accuracy is within ±1%;
3. Precautions: If the deviation exceeds 0.2 bar or the pointer jams, it may be a movement fault. Contact the manufacturer’s after-sales service for handling; do not disassemble the movement by force to avoid damage.