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SMART SENSOR ST8904 4-in-1 Gas Detector Hydrogen Sulfide H2S Carbon Monoxide CO Oxygen O2 Combustible Gas LEL Monitor Rechargeable LCD Display Industrial Safety Analyzer — image 1
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SMART SENSOR ST8904 4-in-1 Gas Detector Hydrogen Sulfide H2S Carbon Monoxide CO Oxygen O2 Combustible Gas LEL Monitor Rechargeable LCD Display Industrial Safety Analyzer

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product for professionals

The SMART SENSOR ST8904 4-in-1 Gas Detector Hydrogen Sulfide H2S Carbon Monoxide CO Oxygen O2 Combustible Gas LEL Monitor Rechargeable LCD Display Industrial Safety Analyzer is a premium product designed for professionals.

USB rechargeable
₹5,657-18%
MRP:₹6,861Save ₹1,204
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Total: ₹5,657
Buying tip: A quality investment for dependable performance and premium build quality.
Estimated delivery: 27 Aug10 Sept
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SKU: bg-2037736

About This Product

The SMART SENSOR ST8904 4-in-1 Gas Detector Hydrogen Sulfide H2S Carbon Monoxide CO Oxygen O2 Combustible Gas LEL Monitor Rechargeable LCD Display Industrial Safety Analyzer is a premium designed for professionals. It delivers reliable performance at an accessible price.

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Specifications:
Detectable Gases: CO (0-999ppm, Resolution: 1ppm), H2S (0-500ppm, Resolution: 1ppm), O2 (0-30%, Resolution: 0.1%), LEL (0-100%, Resolution: 1%)
Display Type: Large color LCD with backlight
Operation Current: 230mA
Operation Voltage: 3.7V
Battery Type: BL-9C Rechargeable battery
Battery Runtime: Up to 6 hours (no alarm)
Operating Temperature: -10°C to 50°C
Storage Temperature: 0°C to 40°C
Humidity Range: 15%-95%
Warm-up Time: Less than 20 seconds
Dimensions: 75 x 138 x 43mm

Features:
1. Real-time Detection of 4 Gases: Accurately monitors Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Oxygen (O2), and Combustible Gas (LEL) in the environment to ensure workplace safety.
2. Smart Alarm System: Equipped with sound, light, and vibration alarms for real-time alerts when gas levels reach critical thresholds, enabling rapid response.
3. Customizable Settings: Enables users to set alarm concentration thresholds and automatic shutdown timers for tailored operation.
4. Versatile Design for Various Applications: Widely applicable in industries such as mining, chemical processing, shipping, fire safety, and construction, with the ability to connect to a sampling pump for confined spaces.
5. User-friendly Interface: Features a large LCD display with backlight for easy data visualization, even in low-light environments.

Package Included:
1 x Multi-Gas Meter
1 x Instruction Manual
1 x USB Cable
1 x Cloth Bag



Product Safety Information

Setup Guide

1
Identify the pins
Locate VCC (power), GND (ground), and data pins (SDA/SCL for I2C, MOSI/MISO for SPI, or TX/RX for UART). Refer to the pinout diagram on the product page.
2
Wire to your microcontroller
Connect VCC to 3.3V or 5V (check the module spec), GND to GND, and data pins to the appropriate GPIO pins on your Arduino or Raspberry Pi.
3
Install libraries
In Arduino IDE, go to Sketch → Include Library → Manage Libraries and search for the sensor library. Install the recommended version.
4
Upload example sketch
Open File → Examples → [library name] → Basic Example. Upload to your board and open Serial Monitor to view output.
5
Calibrate if needed
Some sensors (temperature, humidity, distance) may need a short warm-up period or calibration. Run the calibration sketch if provided.