FIX800 Fixed O₂/CO₂ Detector Installation — Dry Ice Production Facility (Yongin, Gyeonggi-do)

FIX800 Fixed O₂/CO₂ Detector Installation — Dry Ice Production Facility (Yongin, Gyeonggi-do)

This is a gas detector installation case at a dry ice production facility.

Dry Ice and CO₂ Hazards

Dry ice is solid CO₂, widely used as a refrigerant for storing and transporting chilled and frozen food products. Key safety hazards include frostbite from direct skin contact due to its extremely low temperature, and asphyxiation risk as it sublimates. Prolonged exposure to elevated CO₂ concentrations can cause physiological harm and, in severe cases, death.

Gas detectors were installed to enable workers to respond to hazardous conditions and maintain a safe working environment.

Installation Point Selection — Worker Occupancy Zones

The production line extended a considerable length. Installation points were selected based on the areas where workers spend the most time during operations.

FIX800 — Simultaneous O₂ and CO₂ Monitoring

The installed equipment is the FIX800 multi-gas detector. A single unit simultaneously measures and monitors both oxygen (O₂) and carbon dioxide (CO₂) concentrations in real time. As a fixed installation, it supports integration with various communication-based monitoring systems.

LED Display Board and Communication Integration

LED display boards were installed so that all workers on the production line can check current safety status at any time. The system was also integrated with the facility's own control infrastructure via communication output, enabling automated data logging and centralized management.

The FIX800 is a highly versatile detector — the gas types monitored can be selected to match the specific requirements of any operating environment.

Frequently Asked Questions

Q1. Why must both O₂ and CO₂ be monitored simultaneously at a dry ice production facility?

As dry ice sublimates, CO₂ is released into the surrounding air — directly displacing oxygen. Monitoring both CO₂ accumulation and O₂ depletion simultaneously provides a more complete picture of hazard conditions than either measurement alone, catching dangerous situations that a single-gas detector might not detect early enough.

Q2. How many detectors are needed for a long production line?

The general principle is to cover all areas where workers are regularly present. A spacing of approximately 10–15 m, or one unit per ventilation zone, is a common baseline. Optimal placement takes into account site layout, airflow direction, and the locations where dry ice is handled — and should be confirmed by a specialist.

Q3. What data can be transmitted to a central system via RS-485?

The FIX800 can transmit live gas concentration values, alarm status (first and second-stage), fault conditions, and sensor signal data via RS-485. Connection to a DCS, PLC, or HMI enables integrated multi-point monitoring on a single screen with automatic data logging and trend history.

Q4. Does the same configuration apply to dry ice storage rooms and cold warehouses?

Yes. Cold storage environments are often poorly ventilated, allowing CO₂ from sublimating dry ice to accumulate rapidly. Pairing the FIX800 with a display board at the entrance allows workers to verify internal concentrations before entry — providing an essential safety check before entering any area where CO₂ may have accumulated.

Q5. How quickly can CO₂ asphyxiation occur?

In an enclosed space where large quantities of dry ice are sublimating, hazardous concentrations can be reached within minutes. CO₂ above 3% causes breathing difficulty; above 5%, severe physiological distress; above 10%, loss of consciousness within minutes. Without a gas detector, dangerous concentrations may be reached before any smell or physical symptom provides warning.

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