Oxygen O2 Concentration Content Handheld Portable Testing Instrument

1. Introduction and Overview

The SMART SENSOR ST8100A/ST8100B is a high-precision, handheld portable instrument designed for detecting oxygen (O2) concentration. It features a wide detection range of 0-100% VOL, making it suitable for various applications including purity detection in oxygen concentrators, oxygen inhalation intensity monitoring in the medical industry, chemical fields, mining operations, oxygen cylinder concentration assessment, mountaineering safety, and general environmental oxygen level monitoring.

This device is equipped with an electrochemical sensor for sensitive and rapid response, a segment LCD with backlight for clear readings, and a dual sound/flash alarm system to alert users to abnormal oxygen levels. It also measures ambient temperature and humidity, and supports unit conversion for temperature.

For sampling in confined or hard-to-reach areas, the instrument can be connected to an external air pump (purchased separately) via a hose, speeding up air flow and ensuring precise detection.

2. Product Features

• High Precision Probe: Ensures accurate oxygen concentration readings.
• Pump-Enabled Measurement: Compatible with an external air pump (sold separately) for sampling in tight or inaccessible spaces.
• Backlight Display: Provides clear visibility of readings in various lighting conditions.
• Temperature and Humidity Measurement: Displays ambient temperature and relative humidity alongside oxygen levels.
• Unit Conversion: Allows switching between Celsius (°C) and Fahrenheit (°F) for temperature readings.
• Sound and Flash Dual Alarm: Alerts users with both audible and visual signals when oxygen levels exceed or fall below set thresholds.
• Adjustable Alarm Settings: Users can set high and low alarm values according to specific requirements.
• Rechargeable Battery: Equipped with a built-in 3.7V rechargeable lithium battery for extended use.
• USB Charging: Convenient Micro USB DC 5V charging interface.
• Comfortable Rubber Buttons: Ergonomically designed for ease of use and durability.
• Sensitive Sensor Window: Ensures quick and accurate detection.
• Back Bracket: Integrated design for easier placement and measurement.

3. Package Contents

Upon opening your product package, please verify that all the following items are included:

• ST8100A or ST8100B Oxygen Detector Unit
• Protective Carrying Case (Blue)
• USB Charging Cable
• Power Adapter
• Sampling Hose/Tube
• Calibration Certificate/Report
• Printed User Manual
• Small Information Card

4. Specifications

5. Setup

1. Unpacking: Carefully remove the oxygen detector and all accessories from the packaging. Inspect for any signs of damage.
2. Initial Charge: Before first use, fully charge the device. Connect the provided USB charging cable to the Micro USB port on the device and the other end to the power adapter. Plug the adapter into a standard wall outlet. The charging indicator light will show the charging status.
3. Power On: Press and hold the power button (usually marked with a power symbol) for a few seconds until the display illuminates.
4. Optional Air Pump Connection: If sampling in tight spaces, connect the sampling hose to the designated 'IN' port on the air pump (purchased separately) and the other end to the detector's sampling inlet. Ensure a secure connection.

6. Operating Instructions

1. Power On/Off: Press and hold the power button to turn the device on or off.
2. Display Overview: The segment LCD will show the current oxygen concentration (O2%), temperature (°C/°F), and relative humidity (RH%).
3. Mode Button: Use the 'MODE' button to cycle through different display modes or settings if available.
4. Unit Conversion: Press the 'UNIT' button to switch between Celsius (°C) and Fahrenheit (°F) for temperature display.
5. Alarm Settings:
   • The device supports setting high and low oxygen concentration alarm thresholds.
   • Refer to the detailed instructions in the included paper manual for specific steps on how to adjust these values.
   • When oxygen levels fall outside the set range, the device will activate a dual sound and flash alarm.
6. Oxygen Concentration Interpretation:
   • Normal Oxygen Concentration: Approximately 20.9%
   • Minimal Allowable Concentration: 19.5%
   • Reduced Work Efficiency: 15-19% (can lead to head and loop system problems)
   • Breathing Quick, Judgment Lost: 10-12% (lips are purple)
   • Intellectual Loss, Dizziness, Pale Face, Nausea, Vomiting: 8-10%
   • Weak Heartbeat, Open Mouth Breathing, Stop Breathing Soon: 6-8%
   • Fatal in 6 minutes, Breathing Stops, Death: 4-6%
   • Oxygen-Rich: >23%
   • Fatal (tight environment): 100% (within 6 minutes)
7. Using with Air Pump (Optional): If an air pump is connected, activate the pump to draw air through the hose into the detector for sampling in confined spaces like underground areas, complex pipe systems, or airtight environments.

7. Maintenance

• Cleaning: Regularly wipe the device body with a soft, dry cloth. Ensure the sensor window is kept clean and free from dust or debris to maintain accurate readings. Do not use abrasive cleaners or solvents.
• Battery Care: Recharge the built-in 3.7V lithium battery when the battery indicator shows low power. Avoid fully discharging the battery frequently to prolong its lifespan.
• Storage: Store the instrument in a cool, dry place, away from direct sunlight, extreme temperatures, and corrosive gases. Ensure the storage environment is within the specified working environment temperature and humidity range (-10~50°C; <95%RH non-condensing).
• Calibration: While the device comes pre-calibrated, periodic calibration may be required to ensure long-term accuracy, especially after prolonged use or exposure to harsh conditions. Refer to the included calibration report for details and consult the manufacturer for professional calibration services if needed.

8. Troubleshooting

• Device Not Turning On:
  • Ensure the battery is sufficiently charged. Connect the device to the charger and allow it to charge for at least 30 minutes before attempting to power on again.
  • Press and hold the power button firmly for several seconds.
• Inaccurate Readings:
  • Check if the sensor window is clean. Dust or obstructions can affect accuracy.
  • Ensure the device is operating within its specified working environment temperature and humidity.
  • Avoid taking readings in areas with strong air currents or sudden temperature changes.
  • If persistent inaccuracy is observed, the device may require recalibration.
• Alarm Constantly Triggering:
  • Verify the oxygen concentration in the environment. The alarm indicates that the O2 level is outside the set high or low thresholds.
  • Check your alarm settings to ensure they are appropriate for your current application.
• Display Not Working / Flickering:
  • Try restarting the device.
  • Ensure the battery is charged. Low battery can sometimes cause display issues.
  • If the problem persists, contact customer support.

9. User Tips

• Versatile Application: This instrument is highly versatile and can be used in various industrial settings, including chemical processing, mining, and confined spaces like underground decontamination areas or complex pipe systems, where precise oxygen monitoring is crucial.
• Air Pump for Confined Spaces: For optimal results in very tight or inaccessible areas, consider acquiring an external air pump to ensure efficient and accurate sampling.
• Monitor Environmental Factors: Pay attention to the displayed temperature and humidity, as extreme conditions can sometimes influence sensor performance or indicate a need for environmental control in the testing area.

10. Warranty and Support

This product is designed for reliability and performance. For specific warranty details, including coverage period and terms, please refer to the documentation provided with your purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.

For technical support, troubleshooting assistance beyond this manual, or inquiries regarding parts and service, please reach out to the 'Nice Tools Store' where you purchased the product. They can provide guidance and support for your device.