Product Specification

YD31-003 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 Burden

• Ultimate Portability: The overall length is only 160mm (including gun body + short hose), and the weight is only 290g (equivalent to the weight of an ordinary 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, without worrying about long-hose tangling or knotting;
• No Redundant Loss: The short hose shortens the gas transmission path. During inflation, gas directly reaches the tire, avoiding tire pressure detection deviations caused by gas residue in long hoses. It is especially suitable for 12V small-displacement on-board air compressors, and the inflation efficiency is 20% higher than that of long-hose products, saving time for emergency scenarios.

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

• High-Precision Detection: The copper precision 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 of ±3%, ensuring reliable tire pressure data and avoiding tire uneven wear and increased fuel consumption (a 10% decrease in tire pressure leads to an approximately 2% increase in fuel consumption);
• Rapid Reading: The 60mm large dial is equipped with high-contrast scales (black background + white characters), displaying both bar and psi units simultaneously. There is no reflection in strong light, and the scales can be clearly identified in dim environments (such as underground garages). Both the elderly and beginners can read the value within 1 second, with a low operation threshold.

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 community repair stations and car beauty shops. 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 and reducing maintenance costs;
• Wear-Resistant Short Hose: The surface of the PVC short hose is coated with a wear-resistant layer, so there are no scratches from friction with other tools during daily storage. After contact with oil stains, 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, meeting the maintenance needs of multiple vehicles in a family;
• 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 (such as inflating bicycles) or outdoor emergencies (such as roadside tire leaks), it can quickly match the air source.

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

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

• Lightweight Design: The 290g 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, ensuring flexible operation.

(2) Emergency Features, Adapted to Unexpected Scenarios

• Usable as a Tire Pressure Gauge Without Air Source: 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 (such as slow air leakage) in advance, avoiding breakdowns on the road;
• Compact Emergency 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 the side pocket of a carry-on backpack without taking up space. In case of unexpected tire pressure loss (such as a puncture), it can be quickly taken out for inflation without waiting for rescue.

III. Application Scenarios (APPLICATION SCENARIOS)

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

1. Take Out the Tool: Take YD31-003 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 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 YD31-003 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 6.8 bar, confirming the need for inflation;
3. Precise 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. There is no tool rattling during the ride, and the riding experience is not affected.
   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 Community Repair Stations (Scenario 3)

1. Batch Preparation: Connect multiple YD31-003 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 for cars, 2.2 bar for motorcycles);
3. Convenient Storage: After the service, place the tool back on the shelf directly. The short-hose design avoids tangling between tools, saves storage time, and improves service efficiency.
   Result: The service time per vehicle is reduced from 5 minutes to 2 minutes. The lightweight design reduces hand fatigue for staff, adapting to high-frequency, multi-vehicle community service scenarios.

IV. Frequently Asked Questions (FAQ)

Q1: The short-hose design 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 (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. Most family cars can easily access the valve stem after steering, no additional accessories required.

Q2: There is a deviation between the measured tire pressure and that of professional equipment in repair shops. Is the product inaccurate?

1. Operation Correction: Before pressure measurement, ensure the gun nozzle is tightly sealed with the valve stem (press until no air leakage sound is heard). If the seal is not tight, the value will be low; it is recommended to measure the pressure twice continuously and take the average value (normal deviation ≤±0.1 bar);
2. Calibration Suggestion: If the deviation exceeds ±0.2 bar, contact the manufacturer or a professional organization for calibration (the product supports free calibration once within 1 year). The copper movement can restore accuracy after calibration, no need to replace the equipment.

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 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 after every 30 uses. Replace it in time if deformation or cracks are found to avoid tire pressure detection deviations caused by poor sealing.

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

1. Short Hose Protection: The PVC short hose remains flexible at -25℃ and can be bent normally for operation. If the surface of the short hose is frozen, thaw it with warm water before use to avoid poor interface sealing caused by freezing;
2. Pointer Protection: The lubricating grease in the movement is a low-temperature type resistant to -30℃, which does not solidify at low temperatures and ensures smooth pointer rotation. Before use, press the switch 3-5 times without load to preheat the movement using frictional heat, ensuring accurate reading.