The Yaoan YA-D400 LCD Fixed Gas Detector is designed for continuous monitoring of combustible gases, toxic gases and oxygen in industrial environments. Its modular sensor design allows compatible sensor modules to be replaced easily, helping simplify maintenance while supporting a wide range of gas detection applications.
The LCD version features a clear field display for real-time gas concentration monitoring. The detector can provide fault, low-alarm and high-alarm indications, while infrared remote-control operation allows configuration without opening the enclosure. Yaoan also specifies support for zero adjustment, calibration and testing functions.
For system integration, the YA-D400 supports communication options including 4-20 mA, RS485, two-bus and LoRa, depending on configuration. Yaoan states that the unit can store up to 40 high and low alarm records and offers relay outputs that can be used to control equipment such as fans or solenoid valves.
Its rugged enclosure is rated IP67 and is designed for demanding industrial installations. Depending on the installed sensor, the YA-D400 can be configured for combustible, toxic or oxygen detection, making it suitable for factories, chemical processing areas, gas facilities and other fixed gas-monitoring applications.
Features
- Modular Sensor Design: Interchangeable sensor modules simplify servicing and allow different gas configurations.
- Automatic Sensor Life Monitoring: Designed to monitor sensor condition and provide replacement alerts.
- LCD Display: Clear local display for gas concentration and detector status.
- Dual Environment Explosion Protection: Suitable for demanding gas and dust environments with IP67 protection.
- LoRa Wireless Communication: Supports long-range wireless communication where configured.
- Multiple Communication Options: Supports 4-20 mA, RS485, two-bus and LoRa communication.
- Alarm Record Storage: Stores up to 40 high and low alarm records for review and analysis.
- Infrared Remote Control: Allows convenient adjustment without opening the detector housing.
- Relay Control: Three relay outputs can be used for automatic control of equipment such as fans and solenoid valves.
- Simple Maintenance: Calibration-free replacement sensor design helps reduce servicing time.
- Smart Interlocking: Can integrate with alarm and control systems for automatic warning and equipment response.
Specifications
| Specification |
Details |
| Brand |
Yaoan |
| Model |
YA-D400 |
| Version |
LCD |
| Product Type |
Fixed Gas Detector |
| Detection Object |
Combustible Gas Toxic Gas Oxygen |
| Detection Method |
Diffusion |
| Working Voltage |
DC 24 V |
| Temperature Range Combustible |
-40°C to 70°C |
| Temperature Range Toxic |
-20°C to 60°C |
| Humidity Range |
15% to 95% RH |
| Response Time Combustible |
≤30 seconds |
| Response Time Toxic |
≤60 seconds |
| Weight |
≤2 kg |
| Protection Rating |
IP67 |
| Sensor Type Combustible |
Catalytic Combustion |
| Sensor Type Toxic |
Electrochemical |
| Detection Range Combustible |
0 to 100% LEL |
| Detection Range Oxygen Toxic |
Up to 1000 μmol/mol depending on sensor |
| Accuracy |
±5% FS depending on sensor |
| Output Signal |
4-20 mA |
| Communication |
RS485 Two Bus LoRa depending on configuration |
| Relay Output |
3 relay outputs |
| Alarm Record Storage |
Up to 40 high and low alarm records |
| Installation |
Wall Mounted or Tube Mounted |
| Working Mode |
Continuous |
| Size |
205 x 209 x 84 mm |
| Explosion Proof Mark |
Ex d IIC T6 Gb / Ex tD A21 IP67 T80°C |
