Why Fixed PH3 Detectors are Needed: Silos, Ports & Warehouses
Phosphine (PH₃) is released as aluminum phosphide fumigant reacts with moisture — even after fumigation is complete, residual gas continues to off-gas for days to weeks. Uneven concentration pockets in large silos or sealed warehouses repeatedly expose workers to dangerously high levels. Continuous monitoring with the FIX800 is essential to protect workers at all times.
💡 FIX800 Advantages
24-hour automatic monitoring catches PH₃ release even during nighttime/unmanned periods. The FIX-DS display board shows real-time concentration at the entrance, providing a clear go/no-go signal before entry.
PH3 Health Effects
| Concentration | Duration | Health Impact |
|---|---|---|
| 0.3 ppm | 8 hrs TWA | Korean OEL — headache, fatigue |
| 1 ppm | Short-term | Nausea, respiratory irritation |
| 10 ppm | Minutes | Chest pain, respiratory distress |
| 50 ppm | Immediately | IDLH — immediately life-threatening |
| 400+ ppm | Immediately | Pulmonary edema, cardiac arrest, death |
WANDI FIX800: PH3 Continuous Monitoring Solution
- Up to 5 Gases Simultaneously: PH₃, O₂, CO, H₂S, EX
- PH₃ Electrochemical Sensor: Detection from 0.1 ppm — alarming below the 0.3 ppm OEL
- FIX-DS Display Board: Real-time concentration visible from outside the warehouse
- Continuous Operation: 24/7/365 automatic monitoring and alarm
- Web Monitoring: Remote access via PC/smartphone, automatic data logging
A Closer Look at the WANDI FIX800
Below are real photos of the WANDI FIX800 fixed multi-gas detector.


