Frequently Asked Questions
Q: What are Fall Alarm and Instant Alarm, and when are they used?
A: The “Fall Alarm” has two levels: Low Alarm and High Alarm. When the device detects that the user has been stationary for 20 seconds, it triggers a Low Alarm, which can be canceled by shaking the device. If stationary for over 30 seconds, only pressing the right button can cancel the alarm; this is MSA’s patented technology.
MSA’s “Instant Alarm” is activated by holding the left button for 5 seconds and can only be canceled by pressing the right button. If working alone, ensure the device is configured to alert others. MSA’s patented life-saving features include:
- Fall Alarm: Alerts others in the area if a worker is unconscious due to hazardous gas or other threats.
- Instant Alarm: Allows manual activation to warn others of potential dangers.
Q: What power sources are typically used for portable gas detectors?
A: Common power sources include CR2 batteries, alkaline batteries, and rechargeable lithium batteries. CR2 batteries are typically used for single-gas detectors. Alkaline and lithium battery options vary; consult a safety product specialist for details.
Q: How often should a gas detector be calibrated, and what methods are used?
A: Calibration frequency depends on environmental complexity. MSA recommends calibrating the device every 6 months. Calibration methods include: ① Return the device to MSA for calibration. ② Purchase a calibration kit and follow the manual. ③ Send the device to a nationally accredited testing agency.
Q: What is CCCF Fire Safety Compulsory Certification?
A: CCCF (China Compulsory Certification for Fire Safety) is a subset of CCC certification tailored for fire safety products (“F” stands for Fire). Current CCC marks include:
- CCC+S: Safety certification
- CCC+EMC: Electromagnetic compatibility
- CCC+S&E: Combined safety and EMC
- CCC+F: Fire safety certification MSA’s combustible gas detectors are CCCF-certified.
Q: What is the validity period of CCCF certification?
A: CCCF certification is valid for 5 years.
Q: What does the CCCF certification mark look like?
A: 
Q: In which applications should infrared sensor-based gas detectors be prioritized?
A: Catalytic combustion sensors are typically preferred for detecting combustible gases (e.g., hydrogen) due to their simplicity, low cost, and reliability. However, infrared sensors excel in specific scenarios:
- Inert gas sampling: Infrared sensors do not require oxygen (vs. catalytic sensors needing ≥10% O₂).
- Toxic gas environments: Infrared sensors resist poisoning from silicon/lead compounds, which can disable catalytic sensors.
- Carbon dioxide detection: Infrared sensors are ideal for CO₂, which is challenging for electrochemical sensors.
Q: Oxygen sensors are often unstable with short lifespans. How does MSA’s XCell Oxygen Sensor achieve a 4-year lifespan?
A: Most oxygen sensors rely on consumable chemical reactions (e.g., lead oxidation), which deplete over time. MSA’s XCell Oxygen Sensor uses a non-consumable reaction where oxygen is converted to water and regenerated, avoiding self-depletion and extending lifespan.
Q: Which device can measure ethylene oxide?
A: Devices equipped with PID (Photoionization Detector) sensors.
Q: What is the best detector for hydrogen?
A:
- For toxic gas detection (precision in ppm or %vol), use a detector with electrochemical or specialized sensors.
- For combustible gas detection, MSA’s Eagle™ Single Gas Detector is recommended, as it can be calibrated for hydrogen with adjusted response curves.
