1. Introduction
The ST8100B is a precision oxygen concentration instrument designed for accurate and rapid measurement of oxygen (O₂) gas. It utilizes an electrochemical gas sensor for quick response and features manual alarm level setup with both light and sound indicators. This device is suitable for various environments including homes, workshops, petroleum refining facilities, petrochemical plants, and for oxygen content detection in vehicles and industrial settings where oxygen is used or monitored.
2. Safety Information
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in injury or damage to the device.
- Do not attempt to repair or modify the device. Refer all servicing to qualified personnel.
- Ensure proper battery installation and replacement as specified.
- Avoid exposing the device to extreme temperatures, humidity, or corrosive environments.
- Keep the device away from strong electromagnetic fields.
- Always operate the device within its specified operating conditions.
- This device is for measurement purposes only and should not be used as a primary safety device in critical life-support systems without additional safety measures.
3. Product Overview
The ST8100B is designed for ease of use and portability. Key components and controls are outlined below:
- Sensor: Located at the top, responsible for detecting oxygen concentration.
- Display: Large LCD screen showing measurement results and other indicators.
- On/Off Button: Powers the device on or off.
- Backlight/▼ key: Controls display backlight and navigates menus downwards.
- Mode key: Switches between different operating modes.
- Sound/▲ key: Controls audible alarm and navigates menus upwards.
- UNIT key: Changes measurement units.
4. Specifications
| Feature | Specification |
|---|---|
| Brand | SMART SENSOR / OEM |
| Model Number | ST8100B |
| Display | Segment LCD backlight display |
| Gas Type | Oxygen meter |
| Measuring Range | 0~30% VOL |
| Resolution | 0.1% |
| Basic Error | ≤±3% F·S |
| Temperature Range | -20℃~50℃ (accuracy ±2℃) |
| Humidity Range | 1%RH~99%RH |
| Response Time | Less than 15 seconds |
| Recovery Time | Less than 15 seconds |
| Measuring Principle | Electrochemical principle, life for 2 years |
| Alarm Setting | Low / High Alarm setting |
| Alarm Mode | Sound and light dual alarm |
| Operating Temperature | -10℃~50℃ (except LEL is 0 ~40℃) |
| Operating Humidity | 0-95%RH (non-condensing) |
| Storage Temperature | 0~40℃ |
| Product Weight / Size | 138g / 57*28*167mm |
| Implementation Standard | GB12358-2006 |
| Power Supply | 3x1.5V AAA battery |
| Battery Working Runtime | About 100 hours of continuous use (when backlight is off) |
| Packing | Gift Box |
| Packing Contents | 1 * Oxygen Detector, 1 * USB Cable, 1 * Hose, 1 * Carrying Case, 1 * User Manual (English) |
5. Setup
5.1. Battery Installation
The ST8100B requires three (3) 1.5V AAA batteries for operation. Batteries are not included with the device.
- Locate the battery compartment cover on the back of the device.
- Slide the cover open in the direction indicated.
- Insert three 1.5V AAA batteries, ensuring correct polarity (+/-) as marked inside the compartment.
- Close the battery compartment cover securely.
5.2. Initial Power On
Press and hold the On/Off button (usually the red power button) until the display illuminates. The device will perform a self-test and then enter the measurement mode.
6. Operating Instructions
6.1. Taking Measurements
Once powered on, the device will automatically begin measuring oxygen concentration in the surrounding environment. The current oxygen percentage and temperature will be displayed on the HD backlit LCD screen.
6.2. Changing Units
Press the 'UNIT' key to cycle through available measurement units if applicable (e.g., for temperature display between Celsius and Fahrenheit).
6.3. Setting Alarm Values
The ST8100B allows you to set both low and high alarm thresholds for oxygen concentration.
- Enter the alarm setting mode (refer to the device's on-screen prompts or specific button combinations if available).
- Use the '▲' (Sound) and '▼' (Backlight) keys to adjust the 'LO ALM' (Low Alarm) value.
- Confirm the low alarm setting.
- Use the '▲' and '▼' keys to adjust the 'HI ALM' (High Alarm) value.
- Confirm the high alarm setting to save.
7. Alarms
The ST8100B is equipped with a high-decibel buzzer and a visual display alarm. When the detected oxygen concentration falls below the 'LO ALM' value or rises above the 'HI ALM' value, the instrument will activate both audible and visual alarms to alert the user.
8. Effects of Oxygen Concentration on Humans
Understanding the effects of varying oxygen levels is crucial for safety. The table below outlines the symptoms associated with different oxygen concentrations in the atmosphere (at standard atmospheric pressure).
| Oxygen Concentration (%) | Symptoms (Atmospheric Pressure) |
|---|---|
| 100% | Deadly, 6 minutes (Absolutely airtight environment, such as hyperbaric oxygen chamber) |
| 50% | Deadly, can be cured after 45 minutes treatment. (Absolutely airtight environment, such as hyperbaric oxygen chamber) |
| >23.5% | Rich oxygen |
| 20.96% | Normal |
| 19.5% | Minimum |
| 15~19% | Reduce efficiency, and lead to problems of head, lung and circulation system |
| 10~12% | Shortness of breath, loss of judgment, purple lips |
| 8~10% | Governance loss, syncope, unconscious, pale, nausea and vomiting |
| 6~8% | 8 minutes, blood pressure, weak heartbeat, mouth breathing, quickly stopped breathing |
| 4~6% | 40 seconds, convulsions, respiratory arrest, death |
9. Maintenance
- Cleaning: Wipe the device with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Storage: When not in use for extended periods, remove the batteries and store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
- Sensor Care: The electrochemical sensor has a life of approximately 2 years. Regular calibration is recommended to ensure accuracy, though this device does not specify user calibration.
- Battery Replacement: Replace batteries promptly when the low battery indicator appears on the display to ensure continuous accurate operation.
10. Troubleshooting
If you encounter issues with your ST8100B, please refer to the following common problems and solutions:
- Device does not power on:
- Check if batteries are installed correctly with proper polarity.
- Replace with fresh AAA batteries.
- Inaccurate readings:
- Ensure the sensor is clean and unobstructed.
- Verify the device is operating within its specified temperature and humidity ranges.
- Allow the device to stabilize in the environment for a few minutes before taking critical readings.
- Alarm not sounding/flashing:
- Check if alarm settings (LO ALM, HI ALM) are configured correctly.
- Ensure the sound is not muted (if a mute function exists).
For persistent issues, please contact customer support.
11. User Tips
- The device's battery working runtime is approximately 100 hours of continuous use when the backlight is off. To conserve battery life, turn off the backlight when not needed.
- Always ensure the English version of the user manual is available for reference.
- Consider the various applications of the device, such as oxygen generator purity testing, chemical industry monitoring, gallery area safety, oxygen cylinder concentration detection, mountaineering, and agricultural planting, to maximize its utility.
12. Warranty and Support
12.1. Warranty
This product comes with a 1-year warranty from the date of purchase. During the warranty period, if any quality problem arises, please provide photos to demonstrate the issue. The manufacturer will determine whether to send replacement parts or request the instrument for repair or exchange. Please contact customer support before returning any product. You will be responsible for double-run freight costs.
12.2. Support
For technical assistance, troubleshooting, or warranty claims, please refer to the contact information provided with your purchase or visit the official SMART SENSOR website.
13. Company Information
SMART SENSOR is a professional manufacturer and seller of instruments with over 10 years of experience in instrument development and production. The company boasts a strong R&D team and collaborates with domestic universities to develop cutting-edge technology. Their products, including smart multimeters, clamp meters, DC power supplies, laser distance meters, infrared thermometers, vibration meters, thickness gauges, sound level meters, anemometers, temperature hygrometers, range finders, gas detectors, metal detectors, voltage insulation meters, earth resistance testers, and leakage current testers, are known for their quality and market share. OEM/ODM services are available for all models.
14. Certifications
The ST8100B Oxygen Gas Analyzer complies with relevant international standards and holds the following certifications:
- CE Certification
- FCC Certification
- RoHS Compliance
15. Frequently Asked Questions (FAQ)
- Q: Does your company accept customization?
- A: Yes, we offer customizing services for customers, including OEM/ODM. Any logo and color can be customized. An English copy of the manual is also available.
- Q: What is the warranty of the product?
- A: We offer a 12-month warranty. Within the warranty period, if there is any quality problem, please send us photos to show the problem. We will then decide to send you parts or have you send the instrument back for repair or exchange. Please contact us first before sending it back directly. You will only need to pay for double-run freight.
