What gas safety products does Shield manufacture?

Shield designs and manufactures household combustible gas detectors, industrial and commercial point-type combustible gas detectors, gas alarm controllers, portable and 4-in-1 multi-gas detectors, and solenoid gas shut-off valves. The portfolio covers more than 80 marketable models that can be combined into complete detect-alarm-shut-off systems.

Is the Lower Explosive Limit (LEL) the same as the alarm set point?

No. The LEL is the lowest gas concentration in air that can ignite. Combustible gas detectors read in %LEL and trigger alarms well below that limit. Alarm set points are commonly configured in the range of about 20-25% LEL for the first alarm and up to about 50% LEL for the second alarm, but the final values must follow the standard that applies in your country and project.

Why do oxygen detectors display %VOL instead of ppm?

Normal air contains about 20.9% oxygen by volume, so oxygen deficiency or enrichment is measured in percentage by volume (%VOL). A ppm scale is designed for trace-level toxic gases and would be impractical for oxygen monitoring during pipe welding or confined-space work.

How does a gas detector work with a solenoid shut-off valve?

When the detector or gas alarm controller registers a concentration above the alarm value, it emits an audible and visual alarm and sends a linkage signal that closes the solenoid gas shut-off valve. Shield shut-off valves such as the JYFJS-011 series require manual reopening, so gas supply is only restored after the cause of the leak has been checked.

Does Shield support OEM and ODM orders for distributors?

Yes. Shield supports OEM and ODM cooperation. Branding, packaging, documentation and project-specific configuration such as target gas, alarm values and linkage outputs are reviewed and confirmed with our engineering team before sampling and mass production.

Which certifications do Shield products hold?

Applicable Shield products have been awarded China's mandatory 3C certification, and the company holds more than 40 patents. For export projects, our sales engineers confirm the test reports and compliance documents required in the destination market before an order is placed.

High-Quality 4 in 1 Portable Gas Detector BTYQ-Z4 Series - Reliable Safety Solutions from China Suppliers and Factory Manufacturer, Manufacturers

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High-Quality 4 in 1 Portable Gas Detector BTYQ-Z4 Series - Reliable Safety Solutions from China Suppliers and Factory Manufacturer, Manufacturers

Product Overview

The BTYQ-Z4 portable gas detector is an advanced and fully intelligent gas detection solution designed with cutting-edge large-scale integrated circuit technology and international standard intelligent design. This detector utilizes proprietary digital-analog hybrid communication technology and free diffusion detection methods, ensuring high-quality gas sensors deliver exceptional sensitivity and repeatability. Engineered for ease of use and maintenance, it meets rigorous reliability standards for industrial safety monitoring. The rugged casing, made from high-strength engineering plastic, ensures it is waterproof, dustproof, and explosion-proof, making it ideal for adverse conditions.

Application

Widely recognized in various industries, the BTYQ-Z4 gas detector finds application in sectors such as petroleum, chemical processing, environmental protection, metallurgy, refining, gas distribution, biochemical medicine, and agriculture. Our product design, manufacturing, and inspection processes adhere to national standards, guaranteeing quality and reliability. As a trusted China supplier and manufacturer, we offer high-performance gas detectors that meet the needs of diverse industrial applications.

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Product Description

Structure and Function Comparison Table

The appearance and structure of the equipment are shown in the following diagram:

🔘 The device has four buttons, namely left, menu, power, and right.
💡 The device has three indicator lights, namely normal, alarm, and fault indicators.

🔩 Leak Detector Structure

The device mainly consists of components such as the casing, circuit board, battery, display screen, and sensors.

⚙️ Working Principle

🧪 Electrochemical type — detects gas through chemical reactions at the sensor electrode.
🔥 Catalytic combustion type — detects combustible gases via catalytic oxidation on the sensor surface.

Frequently Asked Questions

❓ What are the four buttons on the BTYQ-SD3011 device?

The device is equipped with four buttons: left, menu, power, and right, allowing users to navigate settings and control device functions easily.

❓ What do the three indicator lights on the device represent?

The three indicator lights represent the normal status, alarm status, and fault status, providing at-a-glance information about the device's current operating condition.

❓ What are the main structural components of the leak detector?

The leak detector is composed of five key components: the casing, circuit board, battery, display screen, and sensors, all working together to ensure reliable detection performance.

❓ What working principles does the leak detector use?

The device supports two working principles: electrochemical type, which detects gas via electrode chemical reactions, and catalytic combustion type, which detects combustible gases through catalytic oxidation on the sensor surface.

❓ What is the difference between electrochemical and catalytic combustion detection?

Electrochemical detection is commonly used for toxic gases such as CO and H₂S, relying on chemical reactions to generate a measurable signal. Catalytic combustion detection is primarily used for flammable gases and works by measuring heat generated during catalytic oxidation on the sensor bead.

❓ Is the BTYQ-SD3011 suitable for portable use?

Yes. The device is designed with a compact structure that includes a built-in battery and a clear display screen, making it suitable for portable and on-site gas leak detection applications.

High-Quality 4 in 1 Portable Gas Detector BTYQ-Z4 Series - Reliable Safety Solutions from China Suppliers and Factory Manufacturer, Manufacturers

Product Description

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