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SMART SENSOR ST8904 Multi Gas Detector
The SMART SENSOR ST8904 is a portable 4-in-1 multi gas detector designed for reliable monitoring of O₂, CO, H₂S, and combustible gases in marine, offshore, industrial, and confined-space applications.
The SMART SENSOR ST8904 Multi Gas Detector is a portable 4-in-1 gas detector designed for continuous monitoring of hazardous gases in industrial, marine, and confined-space environments. It simultaneously detects Oxygen (O₂), Carbon Monoxide (CO), Hydrogen Sulphide (H₂S), and Combustible Gases (LEL) using high-precision sensors. The detector features a large backlit LCD, triple alarm system (sound, light, and vibration), rechargeable lithium battery, configurable alarm settings, and a rugged portable design, making it suitable for personnel safety in demanding workplaces.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | SMART SENSOR ST8904 Multi-Gas Detector |
| Brand | SMART SENSOR |
| Model | ST8904 |
| Product Type | Portable 4-in-1 Multi-Gas Detector |
| Gas Detection Capacity | Simultaneous detection of 4 gases |
| Standard Gas Configuration | Oxygen (O₂), Carbon Monoxide (CO), Hydrogen Sulfide (H₂S), Combustible Gas (LEL) |
| Sampling Method | Natural Diffusion (optional external sampling pump available) |
| Sensor Technology | Electrochemical (O₂, CO, H₂S) and Catalytic Combustion (LEL) |
| Display | Backlit LCD display with simultaneous gas readings |
| Response Time | <60 seconds (typical) |
| Accuracy | O₂: ±5% FS, CO: ±10%, H₂S: ±5 ppm, LEL: ±5% FS |
| Alarm Types | Audible, visual (LED), and vibration |
| Alarm Functions | High Alarm, Low Alarm, TWA (Time-Weighted Average), STEL (Short-Term Exposure Limit) |
| Alarm Sound Level | Up to 80 dB |
| Zero Calibration | Supported |
| Span Calibration | Supported using calibration gas |
| Battery Type | Rechargeable 3.7 V Lithium-ion (BL-9C) |
| Battery Capacity | 1800 mAh |
| Battery Runtime | Approximately 6 hours (without alarm activation) |
| Charging Interface | Micro USB (DC 5 V) |
| Operating Voltage | 3.7 V |
| Operating Current | 230 mA |
| Operating Temperature | -10°C to +50°C |
| Storage Temperature | 0°C to +40°C |
| Operating Humidity | 15%–95% RH (non-condensing) |
| Dimensions | 75 × 138 × 43 mm |
| Weight | Approximately 360 g |
| Housing Material | ABS Engineering Plastic |
| Applications | Oil & Gas, Chemical Plants, Mining, Fire Safety, Confined Space Entry, Municipal Services, Environmental Monitoring, Industrial Safety |
Frequently Asked Questions
What is the standard delivery lead time for SMART SENSOR ST8904 Multi Gas Detector?
For standard stocked units, we provide same-day or next-day launch delivery to Singapore anchorages, Jurong port, and shipyards. For international vessels, we dispatch worldwide via DHL/FedEx Express air freight with 2 to 4 business days delivery.
Does this equipment include calibration certificates?
Yes. All portable and fixed detectors, UTI meters, and monitoring instruments supplied or calibrated by Ship Care Service include manufacturer inspection reports and traceable international calibration test certificates.
Are genuine spare parts and replacement sensors available for this model?
Yes, we maintain an extensive inventory of original manufacturer sensors, PCB motherboards, sampling pumps, filters, and sealing kits specifically for this model.
How can I request a commercial quotation?
Simply fill out the Request a Quote form on the right or click "Chat on WhatsApp". Our marine sales engineering desk provides firm commercial quotes with lead times within 2 to 4 hours.
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