Product Specification

YD31-004 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. High-Pressure Compatibility + Precise Movement, No Pressure for Multi-Vehicle Maintenance

(1) 300PSI Peak Compatibility, Covering All-Scenario Pressure Needs

• Multi-Vehicle Adaptation: It not only meets the conventional tire pressure needs of cars (2-3 bar) and motorcycles (2-2.5 bar) but also handles high-pressure inflation for bicycles (8-12 bar, approx. 116-174PSI). No separate tools need to be purchased for different vehicles;
• Wide Air Source Adaptation: It can be connected to 12V on-board air compressors (conventional pressure), household high-pressure air compressors (≤300PSI), and even small high-pressure gas cylinders. There is no risk of pressure overload during short-term inflation, adapting to multi-air-source scenarios such as homes, outdoors, and repair shops.

(2) Copper Movement + Large Dial, Accurate Measurement & Easy Reading

• High-Precision Detection: The copper movement has an error of ≤±0.025 bar within the 0-15 bar range. For example, when the standard tire pressure of a car is 2.5 bar, the measurement accuracy far exceeds the industry average, avoiding tire uneven wear (a 10% decrease in tire pressure shortens tire life by 20%) 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), with clear bar/psi unit divisions. There is no reflection in strong light, and the value can be identified within 1 second even in dim garages. Both the elderly and beginners can operate it easily without repeatedly checking units.

2. Short-Hose Portability + Durable Materials, More Worry-Free for Emergency Use

(1) 330mm Short-Hose Design, No Burden for Storage & Carrying

• Ultimate Portability: The overall length is only 165mm (including gun body + short hose), and the weight is 295g (equivalent to a mobile phone). It can be easily placed in jeans pockets, car armrest boxes (space ≤15cm×10cm×8cm), or motorcycle front storage compartments. It is readily available when going out, avoiding long-hose tangling or knotting;
• Efficient & No Residue: The short hose shortens the gas transmission path, allowing gas to reach the tire directly during inflation, with no "false tire pressure" caused by gas residue in long hoses. It is especially suitable for small-displacement air compressors, and the inflation efficiency is 25% higher than that of long-hose products, saving time in emergency scenarios.

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

• Impact-Resistant Gun Body: The zinc alloy gun body can withstand a 1-meter drop (concrete floor) without deformation or cracking, suitable for high-frequency use in repair shops. Its service life is 3 times that of plastic gun bodies;
• Durable Sealing: The gun nozzle sealing gasket is made of oil-resistant nitrile rubber, maintaining good sealing performance after 500 repeated insertions and removals without air leakage, eliminating the need for frequent replacement;
• High-Pressure Durability: The hose has passed 100 high-pressure impact tests at 300PSI without bulging or cracking, and remains elastic after long-term use, adapting to repeated pressure changes in high-pressure inflation scenarios.

3. Humanized Details + Flexible Adaptation, Low Usage Cost

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

• Lightweight Design: The 295g lightweight gun body causes no burden during hand-held operation. Even when measuring and inflating 4 tires continuously, there is no hand soreness;
• Labor-Saving Switch: The push-type inflation switch only requires 4.5N of force (equivalent to lifting a 0.45kg object), which can be easily controlled by female users and the elderly. The inflation process can be paused at any time to avoid over-inflation.

(2) Interface Replacement + Easy Maintenance, More Cost-Effective for Long-Term Use

• Multi-Air-Source Adaptation: The default G1/4" interface can be connected to most conventional air sources. After replacing it with a G3/8" interface (needs to be purchased separately), it can also adapt to industrial-grade high-pressure air sources, no need to replace tools due to different air source specifications;
• Easy-Maintenance Design: Core components (sealing gaskets, interfaces) can be purchased and replaced individually. For example, after the sealing gasket ages, only a small cost is needed to replace the accessory, no need for overall scrapping, reducing long-term usage costs.

III. Application Scenarios (APPLICATION SCENARIOS)

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

1. Take Out the Tool: Take YD31-004 from the armrest box and connect it to the on-board air compressor directly without arranging a long hose;
2. Rapid Pressure Measurement: Align the gun nozzle with the valve stem, press to seal, and the dial shows 1.9 bar within 1 second, confirming insufficient tire pressure;
3. Precise Inflation: Press the switch to inflate for 15 seconds, release 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 is completed within 1 minute.
   Result: No need to detour to a repair shop, avoiding being late for the morning rush hour. The short-hose design perfectly fits the narrow armrest box. Precise pressure measurement ensures the tire is within the safe pressure range, reducing fuel consumption and tire wear.

2. High-Pressure Inflation for Bicycle Enthusiasts (Scenario 2)

1. Connect to Air Source: Connect the default G1/4" interface of YD31-004 to the high-pressure air compressor, confirming no air leakage;
2. High-Pressure Measurement: Adapt the gun nozzle to the bicycle’s French valve stem, measuring the current tire pressure as 7.5 bar (insufficient);
3. Precise Inflation: Press the switch to inflate slowly, release every 5 seconds to check the tire pressure, and gradually increase it to 10 bar (avoiding high-pressure tire blowout);
4. Carry-On Storage: Disconnect the air source, place the tool into the side pocket of the backpack, with no shaking or noise during the ride.
   Result: No professional air pump is needed; a household high-pressure air compressor can complete high-pressure inflation. Precise pressure control meets the high tire pressure requirements of road bicycles, improving riding speed while avoiding the risk of tire blowout.

3. Multi-Vehicle Service at Community Repair Stations (Scenario 3)

1. Batch Preparation: Connect multiple YD31-004 units to the work station air source, placing them neatly on the tool cart to adapt to different vehicles;
2. Rapid Service: Measure and inflate cars to 2.5 bar, motorcycles to 2.2 bar, and bicycles to 9 bar without replacing tools, completing single-tire pressure detection within 10 seconds;
3. Convenient Storage: After service, place the tools back on the tool cart directly. The short-hose design avoids tangling between tools, saving storage time.
   Result: A single tool replaces multiple sets of equipment, reducing tool procurement costs. Service efficiency is increased by 60%, and the lightweight design reduces staff operation fatigue, adapting to high-frequency service scenarios for multiple vehicle types.

IV. Frequently Asked Questions (FAQ)

Q1: It is marked with a working pressure of 0-220PSI, why is it said to support 300PSI? Will it damage the equipment?

1. Pressure Definition Difference: 0-220PSI (0-15 bar) is the daily continuous working range, suitable for conventional tire pressure of most vehicles; 300PSI is short-term peak compatibility, targeting scenarios such as high-pressure inflation for bicycles (≤174PSI). When the air compressor outputs high pressure for a short time, the built-in buffer structure of the equipment can withstand it without damage risk;
2. Usage Suggestion: Avoid long-term operation above 220PSI. For high-pressure inflation, the single duration should not exceed 1 minute. After completion, disconnect the air source, and the equipment can quickly return to the conventional state without affecting service life.

Q2: The short hose cannot reach the valve stem of the inner tire of the vehicle. How to solve this?

1. Accessory Expansion: Contact the merchant to purchase a dedicated hose extension adapter (optional 500mm/1000mm), connect it between the gun nozzle and the valve stem to extend the operating distance without affecting measurement accuracy;
2. Operation Adjustment: Slightly turn the vehicle (e.g., turn the steering wheel outward) to face the inner valve stem outward. Most family cars can easily access the valve stem after steering, no additional accessories required.

Q3: After long-term use, the dial pointer does not return to zero. Is this an accuracy fault?

1. Deviation Judgment: If the zero-return deviation 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: Use a flat-head screwdriver to open the calibration screw cover on the back of the dial, gently turn the pointer to the zero position. After adjustment, verify with a standard 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; do not disassemble by force.

Q4: When used outdoors at low temperatures (-25℃), will the hose harden and the seal leak?

1. Hose Protection: The PVC short hose uses a low-temperature-resistant formula, remaining flexible at -25℃ for normal bending. If the surface is frozen, thaw it with warm water before use to avoid poor interface fit caused by freezing;
2. Sealing Guarantee: The gun nozzle sealing gasket is low-temperature-resistant nitrile rubber, with no elasticity attenuation at -25℃. It can still fit tightly to the valve stem after pressing, no air leakage;
3. Operation Optimization: At low temperatures, press the switch 3-5 times without load to preheat the movement using frictional heat, avoiding temporary pointer jamming due to low temperatures and ensuring accurate reading.