YJJ GX-3R Portable Four-in-One Gas Detector LEL/O2/CO/H2S Confined Spaces Work

Product Specification

Product Description:

YJJ GX-3R Portable Four-in-One Gas Detector LEL/O2/CO/H2S Confined Spaces Work Closed Environments

Features:

I. Core Parameters (Official Specifications)

1. Detected Gases and Range (Standard Four-in-One)

Flammable Gas LEL (CH₄): 0–100% LEL, resolution 1% LEL; accuracy ±5% reading or ±2% LELGX-3R

Oxygen O₂: 0–40% vol, resolution 0.1% vol; accuracy ±0.5% vol

Carbon Monoxide CO: 0–2000 ppm, resolution 1 ppm; accuracy ±5% reading or ±2 ppm

Sulfur Dioxide H₂S: 0–200 ppm, resolution 0.1 ppm; accuracy ±5% reading or ±2 ppm

2. Alarm Thresholds (Default)

LEL: A1=10%, A2=25%, A3=50% LEL; overload 100% LELGX-3R

O₂: Low alarm 19.5%, high alarm 23.5%

CO: A1=25 ppm, A2=50 ppm, A3=1200 ppm; TWA=25 ppm, STEL=200 ppm

H₂S: A1=5 ppm, A2=30 ppm, A3=100 ppm; TWA=1 ppm, STEL=5 ppm

3. Physical and Environmental

Size: 58×65×26 mm (excluding protrusion)

Weight: Approximately 100 g (ultra-light)

Protection Grade: IP66/68 (dust and waterproof, can be immersed in 2 m water for 1 h)

Explosion-proof Grade: Ex da ia IIC T4 Ga (intrinsic safety explosion-proof)

Operating Temperature: -40℃ ～ +60℃ (no sudden change)

Humidity: 0–95% RH (non-condensation)

4. Power Supply and Battery Life

Battery: Rechargeable lithium battery (3 h fully charged)

Battery Life: Standard mode approximately 25 h; extended battery life mode approximately 40 h (25℃, no alarm / backlight)

5. Sensor and Response

Principle: LEL (catalytic combustion); O₂/CO/H₂S (electrochemical)

T90 Response: <30 s (for most gases)

Life: O₂ 3–5 years; CO/H₂S 2–3 years; LEL 2 years

Features: LEL dual-filament anti-silicon poisoning; CO optional hydrogen compensation type (anti H₂ interference)

6. Functions and Interfaces

Display: Large LCD screen, automatic backlight, real-time multi-concentration display GX-3R

Alarm: 95 dB buzzer + bright LED + vibration (30 cm away)

Data Recording: Automatically stores data, supports IrDA infrared / Bluetooth (Pro version) upload

Calibration: Supports SDM-3R base automatic calibration / ventilation test

Certifications: ATEX, IECEx, China Ex, CE, RoHS, etc.

II. Key Features

Ultra-portable: 100 g ultra-light, can be clipped in the breathing area, without affecting work.

Four-in-One Synchronization: One device covers toxic / flammable / oxygen deficiency risks, reducing procurement and maintenance costs.

Explosion-proof, Waterproof, and Robust: IP66/68 + intrinsic safety explosion-proof, suitable for harsh industrial environments.

Strong Anti-interference: CO hydrogen compensation type optional; LEL dual-filament anti-poisoning, high stability.

Compliance Management: Non-compliance indicator light (flashes once every 30 seconds), indicating uncalibrated / untested / alarm not handled.

III. Main Applications (Application Scenarios)

1. Closed Space Operations (Core)

Municipal underground, sewage pits, septic tanks, pipe wells (anti H₂S / oxygen deficiency)

Storage tanks / ship compartments / containers for internal detection (LEL/CO/O₂/H₂S) Tunnels / Mines / Underground Pipeline Laying (Toxic Gas and Oxygen Deficiency Monitoring)

2. Petroleum and Natural Gas / Chemicals

Drilling platforms, oil transfer stations, refineries (LEL/H₂S/CO)

Chemical workshops, reaction vats, warehouses (Toxic Gas Leakage)

3. Environmental Protection and Public Utilities

Wastewater treatment plants, landfill sites (H₂S Odor and Toxicity)

Gas companies, boiler rooms, pressure regulating stations (Gas Leakage LEL)

4. Emergency and Firefighting

Search and rescue at fire scenes (CO / Oxygen Deficiency / Toxic Gas)

Emergency response, pre-operations for hot work

5. Construction and Manufacturing

Construction sites, basements, pipeline construction

Shipbuilding, steel mills, painting workshops (Flammable / Toxic Gas)

Specifications: