YT-98H Fixed Multi-Gas Detector with 4-in-1 CO/H₂S/O₂/LEL Monitoring Built-in

A powerful pump-suction fixed gas detector that monitors up to 6 gases simultaneously, including the standard 4-in-1: CO (0–1000ppm, 1ppm), H₂S (0–100ppm, 0.1ppm), O₂ (0–30%VOL, 0.1%VOL), and LEL (0–100%LEL, 1%LEL). Features a built-in long-life vacuum pump (>12,000 hours) for fast response and remote sampling – detect gas hazards in high or confined spaces from a safe location. With 2.4″ HD color display, infrared remote control (no need to open the enclosure), 3-wire 4-20mA, RS485 Modbus, and relay outputs. IECEx/ATEX certified Ex d IIC T6 Gb, IP65 rated. Optional integrated or external sound/light alarm.

The YT-98H series is a fixed single and multi-gas detector designed for continuous, simultaneous monitoring of up to 6 gases. Taking the standard 4-in-1 combination (CO, H₂S, O₂, LEL) as an example, it uses electrochemical sensors for CO, H₂S, and O₂, and a catalytic combustion sensor for LEL.

Unlike traditional diffusion detectors that rely on ambient air reaching the sensor, the YT-98H features a built-in long-life vacuum pump with a continuous operating life of >12,000 hours. This pump actively draws air from the sampling point to the detector, providing:

1. Faster response time (T90 ≤ 20 seconds)
2. Remote sampling capability – Install the detector in a normal open area while sampling air from high elevations, underground confined spaces, tanks, or ductwork
3. Effective personnel protection – Maintenance workers can monitor hazardous gas levels from a safe distance before and during entry

The 2.4-inch industrial-grade high-definition color screen (320×240 resolution) features:

1. 120-degree wide viewing angle
2. Simulation menu icons for intuitive navigation
3. Chinese and English switchable interface
4. Comprehensive display: gas molecular formula, concentration value, unit, pump status, and alarm status
5. Maximum (MAX) and minimum (MIN) value display
6. Switchable gas units (ppm, mg/m³, %VOL, %LEL)

The detector supports infrared remote control as standard – adjust settings, perform zero/span calibration, and modify alarm thresholds without opening the enclosure. This is critical for maintaining explosion-proof integrity in hazardous areas. An optional non-contact magnetic wand is also available.

The YT-98H is compatible with most control systems (PLC, DCS, SCADA) through:

Important: The external sound/light alarm can be connected without occupying the relay – separate dedicated terminals are available.

• Sound/light alarm (integrated or external)
• Water-vapor filter cartridge
• Automatic dehumidification & drainage system (normal temperature)
• Manual dehumidification & drainage system (normal temperature)
• High-temperature flue gas pre-treatment system

The YT-98H with built-in pump is ideal for sampling from remote, high, or confined spaces where diffusion detectors cannot reach:

1. Confined Space Entry
   • Install detector outside manhole/tank while sampling inside
   • Pre-entry gas check for O₂ deficiency, H₂S, CO, and LEL
   • Continuous monitoring during worker entry – protect from a safe distance
2. Underground Utilities & Sewers
   • Pump samples from below-ground vaults, lift stations, and sewer lines
   • Detect H₂S (sewer gas) and methane (LEL) before entry
3. Ductwork & HVAC Systems
   • Install detector in mechanical room while sampling from inside air ducts
   • Monitor for refrigerant leaks or combustion byproducts
4. Storage Tanks & Vessels
   • Sample from inside tank during cleaning or inspection
   • Detect flammable vapors (LEL) and toxic gases (H₂S, CO) from residual contents
5. Chimneys & Flue Gas Stacks
   • With optional high-temperature pre-treatment system, sample up to 1200°C flue gas
   • Monitor CO, O₂, NOx, SO₂ for combustion efficiency and emissions compliance
6. Oil & Gas Refineries
   • Sample from flare stacks, catalytic cracker enclosures
   • Monitor H₂S in amine treatment areas, LEL in process units
7. Chemical Plants
   • Sample from reactor vent lines, storage tank headspaces
   • Detect toxic intermediates and flammable releases

Shenzhen YuanTe Technology Co., Ltd. (brand: Safegas) was established in 2010 and specializes in the R&D, manufacturing, and sales of gas detection equipment and integrated systems. With over 16 years of industry expertise, the company serves sectors including oil & gas, chemicals, environmental protection, electronics, municipal engineering, agriculture, and household appliances. Their product portfolio includes portable gas detectors, fixed gas transmitters, gas analyzers, control panels, and calibration accessories. All products are manufactured under ISO9001 and ISO45001 management systems, holding international certifications such as IECEx, ATEX, and EMC. With an annual production capacity of over 80,000 units, YuanTe Technology supplies gas detection solutions to customers worldwide.

1. Established since 2010 – Over 16 years of experience in gas detection R&D and manufacturing.

2. Full product range – Portable detectors, fixed transmitters, analyzers, control panels, and accessories.

3. International certifications – IECEx, ATEX, EMC certified for hazardous areas (including coal mines).

4. Wide gas & industry coverage – Hundreds of gases, serving oil & gas, chemical, mining, environmental, food, pharma, and more.

5. Strong R&D & quality – ISO9001 & ISO45001 certified, with a professional R&D team and global service network.

6. High production capacity – Over 80,000 units per year with fast delivery (5–7 working days typical).

7. Global customer support – 24/7 after-sales service and solutions tailored to diverse industries.