Product Name: CROWCON C8403A Gas Monitor Control System (250 VAC, 50/60 Hz)
🔋 Technical Specifications (Datasheet)
| Parameter | Specification |
|---|---|
| Model | C8403A |
| Power Supply | 250 VAC, 50/60 Hz |
| Power Consumption | ≤ 20 W |
| Sensor Inputs | Up to 8 4–20 mA loops or digital inputs |
| Relay Outputs | 3 × Form C relays (5 A @ 250 VAC) |
| Analog Outputs | 2 × 4–20 mA isolated channels |
| Display | 4.3″ full‑color TFT with backlight |
| Alarm Indicators | Local buzzer (85 dB), 3 × LEDs per channel |
| Communication Ports | RS‑485 (Modbus RTU), optional Ethernet (Modbus TCP) |
| Operating Temperature | –20 ℃ to +50 ℃ |
| Storage Temperature | –40 ℃ to +70 ℃ |
| Enclosure Rating | IP65 |
| Mounting | Wall‑ or panel‑mountable |
| Dimensions (W×H×D) | 300 × 200 × 100 mm |
| Weight | 3.2 kg |
🔍 Product Overview
The CROWCON C8403A is a versatile multi‑channel gas monitoring controller designed for continuous safety supervision in industrial environments. Featuring a bright 4.3″ TFT display, the unit provides real‑time concentration readouts, alarm status, and fault diagnostics. Its flexible input architecture accepts a mix of analog 4–20 mA gas detectors and digital devices, allowing easy integration with existing sensor networks. With rugged IP65 protection and wide temperature tolerance, the C8403A thrives in demanding settings such as chemical plants, oil & gas facilities, and wastewater treatment stations.
💡 Key Features
- Multi‑Channel Support: Monitor up to eight gas detectors or digital inputs simultaneously.
- Configurable Alarms: Three independent relays per channel can be assigned to high, low, or fault conditions.
- Clear HMI: Full‑color touchscreen offers graphical trend charts and one‑touch access to configuration menus.
- Flexible Communications: Standard RS‑485 (Modbus RTU) may be upgraded to Ethernet for networked SCADA integration.
- Fail‑Safe Design: Redundant power inputs and watchdog monitoring ensure continuous operation.
- Rugged Construction: Corrosion‑resistant powder‑coated enclosure resists harsh chemicals and UV exposure.
- Easy Maintenance: Front‑accessible fuses and removable terminal blocks speed up field servicing.
🏭 Typical Applications
- Petrochemical Plants: Leak detection of flammable and toxic gases in processing units and storage areas.
- Oil & Gas: Offshore platforms and onshore compressor stations requiring SIL 2 compliance.
- Water & Wastewater: Hydrogen sulfide monitoring in treatment basins and sludge digesters.
- Industrial Manufacturing: Confined space safety in chemical mixing and paint‐spray booths.
- Mining & Tunneling: Continuous measurement of combustible gas levels in underground works.
📰 Industry News
Recent regulatory updates in Europe and North America have tightened permissible exposure limits for hydrogen sulfide (H₂S) and volatile organic compounds (VOCs), driving widespread upgrades of legacy gas detection networks. Top operators now adopt multi‑gas controllers with predictive analytics to anticipate sensor drift and schedule maintenance before safety margins erode. Additionally, the rise of Industry 4.0 has spurred interest in smart gas monitoring systems that feed live data into cloud‑based dashboards, empowering remote safety managers to respond preemptively.
🏭 About Zhangzhou Fengyun Electric Equipment Co., Ltd.
Zhangzhou Fengyun Electric Equipment Co., Ltd. is a leading supplier of industrial automation and safety solutions. We specialize in sourcing and servicing top European and American brands—including CROWCON, ABB, Siemens, and Schneider Electric. With comprehensive import‑export capabilities, Fengyun serves clients across Asia, Europe, and the Americas. Our dedicated technical team delivers full‑cycle support from system design and pre‑sales engineering through on‑site commissioning and 24/7 after‑sales service.
🤝 Sales & Support
- Sales Engineer: Amy
- Phone: +86 153 5902 9662
- Email: geabbamy@gmail.com
- After‑Sales: 7×24 hotline, remote diagnostics, optional on‑site maintenance contracts.
🔗 Useful Links
🛠️ Recommended Similar Models
| Model | Channels | Outputs | Notes |
|---|---|---|---|
| CROWCON C7200 Multi‑Channel | 6 analog inputs | 3 relays + 1 mA output | Compact footprint |
| CROWCON T4 Transmitter | 4 gas sensors | 2 relays + HART | SIL 2 certified |
| CROWCON T20 Transmitter | 2 electrochemical | 1 relay + 4–20 mA | Ultra‑low power for solar sites |
| CROWCON C96X Controller | 16 digital inputs | 8 relays + Ethernet | Networked gas controller with log |
Note: All models can be tailored with sensor and mounting accessories upon request.
