YJJ 4PH3-CS Phosphine PH3 Electrochemical Sensor 0-20ppm for Grain Fumigation Detector

Product Description:

YJJ 4PH3-CS Phosphine PH3 Electrochemical Sensor 0-20ppm for Grain Fumigation Detector

Features:

Core parameters

- Detection of gas: **PH3 Phosphine**
- Measurement range: **0 - 20 ppm**
- Maximum overload: 100 ppm
- Resolution: **0.1 ppm**
- Sensitivity (20℃): **1.4 ± 0.6 μA/ppm**
- Response time T90: ≤ 30 s
- Baseline (clean air at 20℃): < ±0.4 μA
- Baseline drift (-20~50℃): < 1 ppm eq.
- Bias: 0 mV
- Linearity: Good linear output

Environmental specifications

- Operating temperature: **-20 ℃ ~ +50 ℃**
- Humidity: **15% - 90% RH, no condensation**
- Pressure: Standard atmospheric pressure ±10% (800 - 1200 mbar)

Life and stability

- Expected service life: **2 years (in air)**
- Long-term drift: < 2% signal / month
- Storage conditions: Sealed at 10 - 30℃
- Storage shelf life: Original bottle sealed **6 months**
- Warranty: 12 months

Physical & Electrical

- Packaging: Standard 4-series 4-pin sensor housing, diameter 20.4mm
- Recommended load resistance: 5 - 30 Ω
- Directionality: No direction sensitivity
- Output: Analog microcurrent signal, requires signal conditioning board for acquisition

Interference cross-talk summary

Susceptible to forward interference from H2S and SO2; CO, H2, NH3 interference is relatively small. In fumigation scenarios, algorithm compensation is required for combined compensation.

Typical applications

Phosphine leakage alarm in grain storage fumigation, fumigation plants, quarantine disinfection, replacement of sensing core for portable toxic gas detector, PH3 leakage monitoring in chemical industry

Specifications: