The YA-D400 series fixed gas detectors provide reliable monitoring of toxic and combustible gases across industrial environments including chemical plants, petroleum facilities, metallurgy operations, and liquefied gas stations. Designed for both indoor and outdoor installation, these detectors offer comprehensive protection for personnel, equipment, and premises.

• Real-time Gas Concentration Display - Continuous monitoring with clear numerical readout
• Multi-level Alarm System - Fault, low, and high concentration alerts with audible and visual indicators
• Backlit Field Display - Large, clear characters with red backlight activation during alarms
• Infrared Remote Control - Operation without opening device cover for maintenance
• Three Relay Outputs - 250V 5A capacity for automatic fan and solenoid valve control
• ARM Microprocessor - High-performance processing for reliable operation
• 40 Alarm Records Storage - Historical data tracking for analysis and compliance
• Multiple Communication Options - RS485, two-wire bus, and LoRa wireless connectivity
• Unit Conversion - mg/m³ and μmol/mol measurement flexibility

The YA-D400 toxic gas detector utilizes diffusion-based detection for monitoring various hazardous gases including carbon monoxide, hydrogen sulfide, methane, and ammonia. Ideal for oil and gas facilities, chemical plants, refineries, and wastewater treatment operations where reliable gas detection is critical for safety compliance.

Flexible mounting options include wall, tube, scaffolding, and ceiling installations. Manufactured in Shandong, China to highest quality standards, the detector includes a comprehensive 1-year warranty with full technical support.

• Expert technical support via phone and email
• On-site installation and calibration services
• Scheduled maintenance programs to minimize false alarms
• Staff training for proper detector operation and maintenance