Septic Tanks, Server Rooms, Labs — The Invisible O₂ Deficiency Threat
Oxygen deficiency accidents can render workers unconscious with no prior warning, making continuously operating fixed detectors critical. The WANDI FIX800 monitors O₂ along with up to 4 other gases simultaneously, providing 24/7 oxygen deficiency protection for septic tanks, sewage treatment plants, server rooms, laboratories, and cold storage facilities.
Oxygen Concentration and Health Effects
| O₂ Level (%) | Status | Health Effect | FIX800 Alarm |
|---|---|---|---|
| 20.9 | Normal | Normal atmosphere | Normal display |
| 19.5 | Caution | Minor effects | 1st alarm triggered |
| 18.0 | Alert | Breathing difficulty | 2nd alarm triggered |
| 16 | Danger | Headache, dizziness | Evacuate immediately |
| ≤10 | Extreme | Unconsciousness, death | Maximum alarm |
※ Source: KOSHA, Occupational Safety and Health Standards
Real Incident: O₂ Deficiency Fatality in Confined Underground Space
Case — 2023 Seoul Underground Pipe Room Nitrogen Displacement Accident
In 2023, during nitrogen (N₂) gas work in a basement pipe room of a public building in Seoul, oxygen levels dropped below 15% rapidly. One worker collapsed. The absence of a fixed O₂ monitor and automatic ventilation system meant the standby supervisor had no way to detect the situation. (Source: Ministry of Employment and Labor Accident Statistics, 2023)
WANDI FIX800 — Fixed 5-Gas O₂ Detector
FIX800's 5-Gas Simultaneous Monitoring
A single FIX800 unit continuously monitors up to O₂, CO, EX (LEL), H₂S, and CO₂ simultaneously. Since oxygen-deficient environments usually involve other hazardous gases as well, 5-gas integrated monitoring is the most effective approach to preventing accidents.
Accident Prevention Scenario with the FIX800
- 1Continuous O₂ Surveillance: FIX800 monitors O₂ around the clock regardless of whether workers are present
- 219.5% First Alarm: Warning lights and siren trigger immediately; remote notification sent to supervisor
- 3FIX-DS Display: Real-time O₂ values shown on exterior LED board for pre-entry safety check
- 4Auto-Ventilation: As O₂ drops, ventilation fan activates automatically to supply fresh air
FIX800 O₂ Measurement Specifications
| Item | Specification |
|---|---|
| O₂ Range | 0–30% |
| Alarm Thresholds | 1st: 19.5% / 2nd: 18.0% / Enriched: 23.5% |
| Sensor Type | Electrochemical (galvanic cell) |
| Simultaneous Gases | Up to 5 (O₂, CO, EX, H₂S, CO₂) |
| Display Board | FIX-DS gas concentration display compatible |
| Ventilation Interlock | Auto-fan via relay output |
| Power | AC 220V or DC 24V |
A Closer Look at the WANDI FIX800
Below are real photos of the WANDI FIX800 fixed multi-gas detector.
