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SI-200A is an intrinsically safe (Ex ia) fixed gas detector designed for fast and accurate detection of toxic gases such as HCl, NH₃, and Cl₂—gases that often suffer from delayed response due to adsorption in conventional flameproof (Ex d) detectors. With its optimized sensor housing and internal structure, the SI-200A minimizes adsorption effects, ensuring faster response time and higher measurement accuracy.
This diffusion-type explosion-proof detector is suitable for hazardous areas where toxic, oxygen, or combustible gases may be present. It features a large LCD for real-time gas concentration display and self-diagnostics. The device supports 4–20mA analog output (HART optional), RS-485 digital communication, and enables convenient configuration and calibration via wireless connection.
KEY FEATURES
- Explosion-proof Structure (Transmitter): Ensures safety in hazardous areas.
- Intrinsically Safe Sensor Housing: Certified Ex ia structure for high-risk environments.
- Optimized for Adsorptive Toxic Gases: Fast and accurate detection of HCl, NH₃, Cl₂, and similar gases.
- 4-digit Gas Concentration Display: Provides real-time readings on a large LCD screen.
- Self-diagnostic Function via LCD: Enables early detection of sensor or system faults.
- 4–20mA Output (HART Optional) / RS-485 Communication: Supports both analog and digital data transmission.
- Wireless Communication Supported: Allows remote configuration and calibration.
- Suitable for Hazardous Area Installation: Designed for industrial environments with explosion risks.
Product Specifications
| Model | SI-200A |
|---|---|
| Dimensions | 169mm (W) × 188.5mm (D) × 107mm (H) |
| Weight | 2.4kg |
| Operation Power | DC: +24Vdc ±10% |
| Power Consumption | 3.6W @ +24VDC |
| Operation Mode Display | FND, Concentration of Gas, Alarm, Malfunction |
| Relay | 1st Alarm, 2nd Alarm, Fault Alarm (Rated 2.0A @30Vdc) |
| Analog Output Signal | 4–20mA |
| Digital Output Signal | RS-485 |
| Measuring Method | Diffusion |
| Operating Temperature | -40℃ to +60℃ |
| IP | IP66 |
| Input and Setting | 4 Buttons & RS-485 & Bluetooth |
| Device Warranty | 2 years |
| Sensor Warranty | 1 year |
| Wireless Interface | RS-485 Modbus, HART (Option) |
| Certification | KCs: Ex db ia IIC T4 Gb IECEx: Ex ia IIC T4 Gb ATEX: II 2 G Ex ia IIC T4 Gb PESO |
Sensor Specifications
| Gas | Sensor | Range | A1 | A2 | Resolution |
|---|---|---|---|---|---|
| Hydrogen Chloride (HCl) | Electrochemical | 0~10ppm | 1ppm | 2ppm | 0.5ppm |
| Ammonia (NH₃) | Electrochemical | 0~100ppm | 25ppm | 35ppm | 1ppm |
| Ammonia (NH₃) | Electrochemical | 0~1,000ppm | 25ppm | 50ppm | 1ppm |
| Hydrogen Fluoride (HF) | Electrochemical | 0~10ppm | 3ppm | 6ppm | 0.5ppm |
| Nitrogen Dioxide (NO₂) | Electrochemical | 0~20ppm | 3ppm | 5ppm | 0.1ppm |
| Chlorine (Cl₂) | Electrochemical | 0~5ppm | 1ppm | 2ppm | 0.1ppm |
| Hydrogen Cyanide (HCN) | Electrochemical | 0~50ppm | 2ppm | 5ppm | 1ppm |
| TAR | Electrochemical | 0~100ppm | |||
| Fluorine (F₂) | Electrochemical | 0~10ppm | |||
| Silane (SiH₄) | Electrochemical | 0~10ppm | 2.5ppm | 5ppm | 0.1ppm |