County Line Trucking

What County Line Trucking does

Shenzhen Letianshi Co., Ltd. (深圳市乐天使股份有限公司, formerly Shenzhen Nuoan Environment Safety Co., Ltd.) is a Chinese industrial gas detection equipment manufacturer headquartered in Guangming District, Shenzhen. The company is the operating entity behind the countylinetruckingnb.com domain and is publicly listed on China's New Third Board (NEEQ) under ticker 430096 since 2016, with a legal predecessor traced to 1985 and the current joint-stock form dating to 1999. Its product portfolio spans seven series and approximately 200+ SKUs covering photoionization (PID) VOC detectors, NDIR infrared gas detectors, TDLAS laser gas detectors, combustible and toxic gas detectors, portable multi-gas detectors, gas alarm controllers, and flame detectors, supported by sampling pretreatment, GDS control, and industrial IoT system solutions.

Letianshi's core technology stack spans three sensing modalities — UV photoionization for ppb-level VOC detection, NDIR for combustible and infrared-active gases, and TDLAS for laser-based methane and open-path detection — integrated through an industrial HSE IoT platform with MQTT, NB-IoT, LoRa, Bluetooth, Zigbee, and Modbus RS485 connectivity, and DCS/SIS/fire-system interoperability. The company holds 220+ patents and software copyrights, has participated in drafting 10+ national and industry standards, and maintains certifications including ISO9001/14001/45001, CCC, CPA, SIL2, IECEx, ATEX, CE-EMC, EAC, and CCCF. It supplies major Chinese state-owned petroleum and petrochemical enterprises (CNPC, Sinopec, CNOOC, Sinochem, Wanhua Chemical, ZPC), and is expanding into metallurgy via standards authorship and into Southeast Asia via export channels.

The business model combines hardware sales (detectors, controllers, sensors, modules) with system integration and OEM/module supply, sold primarily through direct enterprise field sales supplemented by distributor networks; pricing is quote-based and not publicly disclosed. Customers span petroleum/petrochemical, steel/metallurgy, urban gas, chemical/pharmaceutical, new energy/LNG, municipal/environmental, emergency response, and semiconductor/equipment manufacturing verticals. Note: A small firmographic stub in the source data labeled 'County Line Trucking' (a Canadian transportation company, 11–50 employees, founded 2004) is inconsistent with the substantive first-party website and corporate filings and is not used to characterize the analyzed entity.

Name

County Line Trucking

Legal name

深圳市乐天使股份有限公司

Website

https://countylinetruckingnb.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

Shenzhen Letianshi Co., Ltd. (operating at countylinetruckingnb.com) is a Chinese NEEQ-listed industrial gas detection equipment manufacturer serving petroleum, petrochemical, metallurgy, and urban gas operators with PID, NDIR, and TDLAS-based detectors, controllers, and IoT monitoring systems.

Ownership category

akta.pro rank

Product category

Industrial Gas Detection Equipment

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Analytical Laboratory Instrument Manufacturing (334516)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Laboratory Analytical Instruments (3826)

akta.pro primary industry

Process Analytical Instrumentation (Gas analyzers, spectroscopy, pH/ORP, conductivity) (IMAGAFAE)

akta.pro secondary industries

Fixed Gas Detection & Continuous Monitoring (Sensors/IoT/Telemetry) (EUAJADAB), Fugitive Emissions & Leak Detection (LDAR, OGI, Methane) (EUAHADAB), Gas Leak Detection (Natural Gas/Propane) & Combustible Gas Alarms (HSAHAGAI)

Keywords

• Industrial gas detection
• Combustible gas monitoring
• Toxic gas sensors
• Gas alarm systems
• VOC detection equipment

Headquarters

HQ city

Woodstock

HQ country

Canada

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. 气体探测及报警设备硬件销售: Sale of gas detectors (fixed, portable), alarm controllers, flame detectors, laser detectors, gas analyzers, and accessories across seven product series and 200+ models. One-time hardware purchase model with standard warranty.
2. 系统解决方案及集成服务: Design, integration, and deployment of industrial HSE IoT monitoring systems, GDS alarm control systems, and sampling pretreatment online monitoring systems. Includes installation, commissioning, and after-sales technical services.
3. 智能传感器及模块: Sale of intelligent gas sensor modules and core sensor components (PID sensors, NDIR sensors) to equipment manufacturers (OEM) for integration into their own products.

Go-to-market motion3 records

Distribution channels4 records

Marketing channels5 records

Core offering

The company designs, manufactures, and supplies industrial gas detection equipment, including fixed and portable gas detectors, gas alarm controllers, flame detectors, laser gas analyzers, and gas sampling systems, together with integrated gas detection monitoring systems and an IoT safety supervision platform. Products serve industrial safety, environmental monitoring, and emergency response use cases across petroleum, petrochemical, metallurgy, urban gas, chemical, pharmaceutical, semiconductor, and new energy sectors.

Product overview

乐天使 (Nuonan) is a comprehensive gas detection and sensor technology provider offering seven major product series across 200+ product models. The portfolio centers on intelligent gas sensors and detectors including PID-based VOCs detectors (PID900, PID901, PIDScan800, PIDSense880), infrared gas detectors (GTYQ-IR500 series), and combustible/toxic gas detectors (GTYQ-SNE600, SNE4100B series). The portable detector lineup includes SNE380/BTYQ-SNE380 multi-gas detector, PIDView300, SNE330E, and SNE360. Supporting infrastructure includes SNE800 series gas alarm controllers and NAFD flame detectors. Advanced laser-based solutions include XT-TDLScan200 and XTQ-TDLScan100 for open-path detection. The company also offers complete system solutions including SNE-GPS-501 sampling pretreatment monitoring system, GDS gas detection alarm control system, and industrial IoT monitoring platform. All products are backed by proprietary sensor technology and serve industries including petrochemical, metallurgy, electric power, environmental protection, and pharmaceuticals.

Differentiator

Problem solved

Functional benefit

Products and services

• PID VOCs Detector Series (PID900, PID901, PIDScan800, PIDSense880) Fixed and handheld VOC detectors using photoionization detection for ppb- to ppm-level measurement of toxic and hazardous vapors in industrial hygiene, environmental, and process safety applications.
• Infrared Gas Detector Series (GTYQ-IR500, GTYQ-IR500L, GTYQ-IR500M, GTYQ-IR500S) Non-dispersive infrared (NDIR) gas detectors for combustible hydrocarbon gases and CO2, designed for hazardous-area fixed installation in oil & gas, chemical, and process industry environments.
• Combustible Gas Detector Series (GTYQ-SNE4100B, GTYQ-SNE600, GTYQ-SNE600B, GTYQ-SNE600C) Fixed combustible gas detectors for methane, LPG, and other hydrocarbon leaks in process plants, tank farms, and pipelines, with explosion-proof enclosure variants.
• Toxic Gas Detector Series (SNE4100B, SNE600E, EC35, SNE600) Fixed toxic gas detectors based on electrochemical sensors for detecting hydrogen sulfide, carbon monoxide, ammonia, chlorine, oxygen deficiency/enrichment, and similar hazards in chemical, metallurgical, and pharmaceutical facilities.
• Portable Gas Detector Series (SNE380, PIDView300, SNE330E, SNE360) Portable single- and multi-gas detectors carried by workers and responders for confined-space entry, leak survey, plant patrol, and emergency response, with continuous readout and alarm functions.
• Gas Alarm Controller Series (SNE808, SNE800, SNE800A, SNE806) Wall-mounted and panel-mounted gas alarm controllers that aggregate inputs from multiple field detectors, display concentrations, and trigger audible/visual alarms and shutdown signals for centralized gas safety supervision.
• Flame Detector Series (NAFD-500IU, NAFD-400IR, NAFD-300IR) Optical flame detectors using ultraviolet, infrared, or combined UV/IR triple-spectral sensing for early fire detection in oil & gas, petrochemical, and tunnel applications.
• Laser Gas Detector Series (XTQ-TDLScan100, XT-TDLScan200) Tunable diode laser absorption spectroscopy (TDLAS) analyzers for in-situ, extractive, and open-path measurement of gases such as NH3, H2S, CO, CH4, and O2 in harsh process and stack monitoring environments.
• Wireless Gas Detector (SNE320) Wireless combustible gas detector that transmits readings over cellular or wireless networks for installations where cabling is impractical, including remote wellheads and temporary sites.
• InfraSense-101 Gas Analyzer Infrared gas analyzer for continuous measurement of combustion, process, and flue gas compositions, used in OEM analyzers and integrated emission/process monitoring skids.
• SNE-GPS-501 Gas Sampling System Pre-engineered gas sampling and conditioning system that delivers a clean, conditioned sample stream to analyzers and detectors in process and emission monitoring applications.
• GDS Gas Detection Control System Proprietary integrated gas detection control system that ties together detectors, alarm controllers, and a central supervision platform for plant-wide gas safety monitoring, data logging, and remote alarm push notifications.
• IoT Gas Detection Safety Supervision Platform IoT-based safety supervision platform that connects field detectors and controllers to a centralized cloud dashboard for multi-site gas monitoring, alarm dispatch, data analytics, and regulatory reporting.

Quantifiable outcome

• Detection sensitivity reaches ppb (parts per billion) level for VOCs, significantly exceeding traditional electrochemical sensors (ppm level)
• +3 more outcomes

Named customers6 records

Segments8 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration10 records

AI capability8 records

Feature6 records

Partnerships

Four partnerships are on record, tiered core and supporting.

• 《冶金行业可燃气体和有毒有害气体检测报警系统设计标准》编制组coreStrategic or Co-development Partner · 27 March 2025Le Tian Shi participated as a key contributing unit in the second drafting meeting for the group standard 'Design Standard for Combustible and Toxic Gas Detection Alarm Systems in Metallurgical Industry' (团体标准) organized by CISDI in Shenzhen. The company provided technical recommendations on gas detection equipment selection, innovative design, installation, system linkage, and cost control.
• 中冶赛迪 (CISDI)coreStrategic or Co-development PartnerCISDI organized the metallurgical industry gas detection alarm system standard drafting committee. Le Tian Shi participated as an important contributing unit in the standard development for the metallurgical industry.
• 高校产学研合作单位 (University Research Partners)supportingStrategic or Co-development PartnerLe Tian Shi collaborates with domestic universities for joint research and talent development. The company has established a postdoctoral innovation practice base and collaborates on R&D projects, talent exchange programs, and technology commercialization with academic institutions.
• 深圳工业总会 (Shenzhen Industrial Association)supportingStrategic or Co-development PartnerPartner organization for Shenzhen Enterprise Innovation Records program and other industry evaluation activities. Le Tian Shi participates in association-led brand building and innovation evaluation programs.

Scale indicators5 records

Recent moves13 records

Expansion highlights5 records

Broad incumbents

• Yokogawa Electric: Japanese industrial automation and instrumentation major with process gas analyzers and field instruments. Comparable as a broader process analytical instrumentation supplier to oil & gas, petrochemical and LNG customers where Le Tian Shi's NDIR/TDLAS analyzers compete.
• Honeywell Analytics (Honeywell International): Honeywell's industrial safety business supplies gas detectors, controllers, and flame detectors under brands like BW, Sieger and XCD. Comparable product set to Le Tian Shi; broader portfolio but overlapping in fixed combustible/toxic gas detection for oil & gas and petrochemical customers.

Direct peers

• MSA Safety: US-based safety equipment manufacturer with a strong industrial gas detection portfolio (fixed, portable, sensors). Comparable in target customers and product mix, including combustible/toxic gas detectors for oil & gas and petrochemical end markets.
• Bacharach: US-based gas detection and refrigerant/combustion analysis company. Comparable in fixed and portable gas detectors and gas analyzers (especially NDIR) targeting commercial and industrial sites, including refrigeration and HVAC adjacent to Le Tian Shi's footprint.
• Anhui Lianshi (安徽蓝箭, Bluesky): Chinese industrial gas detector manufacturer specializing in flammable and toxic gas detection systems for coal, metallurgy, and city gas. Overlaps with Le Tian Shi on fixed detectors, controllers and GDS systems sold to industrial end users.
• RKI Instruments (Riken Keiki): Japanese-origin gas detection specialist (with US RKI Instruments subsidiary) selling fixed and portable gas detectors, sensors, and controllers. Comparable in core technology (catalytic, electrochemical, NDIR, PID) and in targeting industrial safety buyers in oil & gas and chemical plants.
• Dräger (Drägerwerk): German global leader in gas detection and respiratory protection. Directly comparable as it sells fixed and portable gas detectors, sensors and alarm controllers across the same petrochemical, metallurgy, and city gas customers that Le Tian Shi serves.
• Industrial Scientific: US-based specialist in portable and connected gas detection with strong oil & gas and confined-space focus. Closely comparable in multi-gas portable detectors, wireless monitoring, and safety services for hazardous environments.
• Hanwei Electronics (汉威科技): Henan-based Chinese gas sensor and detector manufacturer and the most direct domestic competitor. Sells semiconductor and electrochemical gas sensors, detectors and modules into largely the same industrial and consumer safety markets as Le Tian Shi.

Emerging players

• Sensidyne: US industrial air quality and gas detection specialist representing smaller competitors like ATI, Sensitech, and others. Comparable in fixed gas detectors for industrial hygiene, petrochemical, and wastewater plants, though smaller in scale than the majors.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/countylinetrucking
• LinkedInlinkedin.com/company/county-line-trucking-inc

Compliance15 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about County Line Trucking