Shield one-stop customized gas detector and shut-off valve services
Professional gas safety solutions for industrial and commercial sites
End-to-end gas safety ecosystem from detection to emergency shut-off
Gas Detector Manufacturer Since 18+ Years

Gas Detectors & Solenoid Gas Shut-off Valves, Engineered for Every Leak Scenario

Sichuan Shield Technology designs and manufactures complete gas safety systems in Chengdu, China — household combustible gas detectors, industrial point-type detectors, gas alarm controllers, portable multi-gas detectors and emergency shut-off valves. Importers, distributors, gas utilities and EPC contractors source one compatible, factory-tested chain from detection to isolation.

Explore Product Range Talk to an Engineer

Quality Assurance

Workshop QA system covering sensor calibration, alarm-value verification and linkage testing before dispatch.

Factory-Direct Value

In-house R&D and production of detectors, valves and controllers — no trading layers between you and the factory.

Stable Supply Capacity

80+ marketable models with repeatable production for distributor stock programs and multi-phase projects.

Responsive Global Service

English-speaking engineers for selection, installation guidance and after-sales support across time zones.

Advanced Gas Detection

Product Classification

Built on a sustainable model of technology accumulation, Shield offers more than 80 marketable models. Filter by category to compare detectors, controllers and shut-off valves for your application.

Sichuan Shield Technology gas detector R&D and production facility in Chengdu
About Shield

Company Profile: A Gas Safety Specialist with Its Own R&D and Factory

Sichuan Shield Technology Co., Ltd. is a certified high-tech enterprise recognized as a "Specialized, Refined, Distinctive and Innovative" company and a New Economy Top-100 enterprise. We integrate R&D, production, sales and service of gas detection and alarm equipment, industrial instrumentation, valves, explosion-proof electrical products, sensors and intelligent IoT devices.

Our engineers answer real field questions every week — from why pump-suction oxygen detectors for pipe welding read in %VOL, to why the Lower Explosive Limit should never be confused with an alarm set point. That hands-on experience is built into every product we ship.

  • China 3C Certified Products
  • High-Tech Enterprise
  • OEM / ODM Supported
  • Gas & Heating China Exhibitor
0+

Years of Industry Experience

0+

Marketable Product Models

0+

Granted Patents

Request a Catalog Global Service
System Architecture

How a Shield Gas Safety System Protects Your Site

Detectors, controllers and valves from one manufacturer share proven signal compatibility — fewer integration risks, faster commissioning and a single point of technical responsibility.

01

Detect

Household or point-type sensors continuously measure combustible gas concentration in %LEL.

Point-type detectors
02

Alarm

When the set point is exceeded, audible and visual alarms warn occupants on site immediately.

Household detectors
03

Isolate

A linkage signal closes the solenoid shut-off valve; gas is restored only after a manual reset.

Shut-off valves
04

Supervise

Gas alarm controllers in the control room log status, faults and alarms from every field detector.

Alarm controllers
Project Cases & Solutions

Gas Safety Solutions Proven Across Industries

Hover a scenario to see typical risks and the Shield product combination we recommend for buyers and project engineers.

Gas detection for underground pipe network

Underground Pipe Network

Methane can accumulate silently in valve chambers, manholes and utility tunnels.

Risk
Gas build-up in enclosed spaces
Solution
Point-type detectors + portable patrol detectors
View portable detectors
Household gas leak detection and automatic shut-off

Household Gas

Kitchen leaks and incomplete combustion are leading causes of residential gas accidents.

Risk
Natural gas / LPG leakage indoors
Solution
Household detector + solenoid shut-off valve
View household detectors
Gas detection system for petrochemical industry

Petrochemical Industry

Process units and tank farms need continuous zone monitoring and centralized alarms.

Risk
Combustible gas release in process areas
Solution
Bus-type detectors + gas alarm controller + 4-in-1 portables
View alarm controllers
Municipal gas safety monitoring

Municipal Field

City gas utilities require reliable monitoring of regulator stations and public facilities.

Risk
Leaks at stations and distribution points
Solution
Fixed point-type detection + inspection detectors
View point-type detectors
Gas detection for industry and commerce

Industry & Commerce

Restaurants, boiler rooms and workshops combine high gas consumption with public occupancy.

Risk
Leaks near burners and gas trains
Solution
Stand-alone detector with valve linkage
View shut-off valves
Gas safety for residential communities and property developers

Residential Communities

Developers and gas companies roll out detectors across thousands of units per phase.

Risk
Inconsistent quality across large batches
Solution
Standardized household kits with OEM branding
Request the catalog
More Projects More Services
For Importers & Distributors

OEM / ODM Gas Detector Supply Built Around Your Market

Whether you are launching a private-label household detector line or equipping an industrial EPC project, our team aligns product configuration, documentation and delivery with your local requirements.

  • Branding, labels, manuals and packaging customization
  • Target gas, alarm values and linkage outputs reviewed per project
  • Compliance documents confirmed for your destination market
Request a Catalog
  1. 01

    Requirement Review

    Share the gas type, installation environment, target standard and order volume. Our engineers recommend matching models.

  2. 02

    Sample & Validation

    Samples are configured to your specification so you can test sensitivity, alarm behavior and valve linkage locally.

  3. 03

    Customization & Pilot Run

    Branding, packaging and documentation are finalized and verified in a pilot batch before mass production.

  4. 04

    Quality Inspection

    Every unit passes our workshop quality assurance system, including calibration and functional alarm checks.

  5. 05

    Delivery & Global Service

    Export packing, shipping coordination and ongoing technical support for installation and maintenance.

Our Partners

Trusted by Gas Utilities and Industry Leaders

Shield is proud to supply products, services and system solutions to these well-known brands.

  • Shield partner brand 1
  • Shield partner brand 2
  • Shield partner brand 3
  • Shield partner brand 4
  • Shield partner brand 5
  • Shield partner brand 6
  • Shield partner brand 7
  • Shield partner brand 8
  • Shield partner brand 9
  • Shield partner brand 10
  • Shield partner brand 11
  • Shield partner brand 12
Supplier of Professional Gas Detection Equipment

Get the Complete Shield Product Catalog

Receive full technical specifications, installation guides and application notes for every detector, controller and shut-off valve series — plus updates on new releases, case studies and gas detection know-how from our engineering team.

Request a Catalog Contact Us
[email protected] +86 28 81511655
Shield gas detectors and solenoid shut-off valve product family
News & Expert Insights

Our Latest News

Product launches, certifications, exhibitions and practical guidance from engineers who answer buyer questions every day.

View All Articles
Buyer FAQ

Gas Detector Sourcing Questions, Answered by Engineers

Straight answers to the questions importers, distributors and project engineers ask us before placing an order.

Ask a Technical Question
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.