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Gas Alarm Controller with 4 to 20 mA Input for Centralized Gas Monitoring TH100-4
Product Overview
The TH100-4 is a centralized gas alarm controller designed to receive signals from compatible fixed gas detectors and provide continuous concentration display, alarm indication and external equipment control.
The controller accepts standard 4 to 20 mA detector signals and displays gas concentration, measurement units, alarm status and fault information through a clear 0.8 inch digital display. Audible and visual warnings provide immediate notification when a connected detector enters a low alarm, high alarm or fault condition.
Passive relay outputs allow the TH100-4 to control external safety equipment such as ventilation fans, solenoid valves and other alarm related devices. The mute function enables operators to temporarily silence the audible warning during testing, inspection or accidental alarm activation without interrupting system monitoring.
Designed for wall mounted installation in safe areas, the TH100-4 provides a practical centralized solution for continuous gas detection systems.
Key Features
- Centralized gas concentration monitoring and alarm management
- Standard 4 to 20 mA analog signal input
- Compatible with gas detectors providing 4 to 20 mA output
- 0.8 inch digital display
- Displays concentration units alarm status and fault information
- Audible and visual alarm notification
- Separate indication for detector fault low alarm and high alarm
- Alarm mute function for testing and maintenance
- Passive relay outputs for external equipment control
- Suitable for ventilation fan control
- Suitable for solenoid valve control
- 24 VDC output available for connected channels
- Communication distance up to 1200 meters
- Wall mounted installation in safe areas
- IP54 enclosure protection
- Designed for continuous gas monitoring systems
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | TH100-4 |
| Product Type | Gas Alarm Controller |
| Display | 0.8 inch digital tube |
| Power Supply | AC220V ±15 percent 50Hz ±1 percent |
| Host Power Consumption | ≤10 W |
| Output Voltage | DC24V ±15 percent |
| Input Signal | 4 to 20 mA |
| Channel Output | DC24V 500 mA per circuit |
| Communication Distance | ≤1200 m |
| Alarm Method | Audible and visual alarm |
| Relay Output | Passive relay output |
| Relay Contact Capacity | 10 A at 30 VDC or 5 A at 220 VAC |
| Applicable Detector | Gas detector with 4 to 20 mA output |
| Installation | Wall mounted installation in safe area |
| Operating Temperature | Minus 10 degrees C to plus 50 degrees C |
| Operating Humidity | 10 to 95 percent RH non condensing |
| Working Pressure | 86 to 106 kPa |
| Storage Temperature | 0 to plus 40 degrees C |
| Storage Humidity | 15 to 95 percent RH non condensing |
| Protection Rating | IP54 |
| Implementation Standard | GB 16808 2008 |
Typical Applications
The TH100-4 is suitable for centralized gas alarm systems requiring continuous concentration monitoring, detector fault supervision and automatic control of external safety equipment such as ventilation fans, warning devices and solenoid valves.
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