Understanding Fixed Gas Detectors
Fixed gas detectors provide continuous monitoring in industrial settings. These devices mount permanently to walls or ceilings and connect to central control systems. At Shanghai Gewei Electronic Safety Equipment Co., Ltd., our fixed detectors use advanced sensor technologies to ensure reliable detection of combustible and toxic gases. Unlike portable units, fixed models operate 24/7 without human intervention, reducing response times to potential hazards.
Key Features of Fixed Gas Detectors
Fixed gas detectors incorporate sensors such as catalytic combustion, infrared, and electrochemical types. Our GDE series employs infrared and laser sensors with a lifespan over 5 years. These sensors offer precision of ±3% for infrared models and response times of 20-25 seconds. Automatic temperature compensation and zero-point calibration maintain accuracy in varying environments. Electrical outputs include 4-20mA current loops, RS485 bus, and relay contacts for integration with alarms.
The GDC series uses imported gas-sensitive elements with catalytic and semiconductor principles. Sensor lifespan reaches 3 years for anti-poisoning catalytic types. These detectors support bus and point-to-point outputs, with explosion-proof designs for hazardous zones 1 and 2. Display modules feature color LED screens visible up to 25 meters, showing concentration and status without opening the cover.
Applications in Industrial Environments
Fixed detectors suit petrochemical, metallurgy, power, and pipeline corridor facilities. The GDA series targets gas, pharmaceutical, and semiconductor industries with compact designs and high integration. These units detect combustible gases and volatile organics, complying with GB15322 and GB3836 standards. In complex settings, they provide linear output and humidity resistance up to 95% RH.
Advantages of Fixed Models for Long-Term Safety
Portable detectors serve mobile inspections, but fixed models excel in permanent installations for ongoing risk management. They eliminate the need for daily carrying and charging, ensuring uninterrupted surveillance.
Continuous Monitoring and Data Logging
Fixed systems log gas concentrations over time, aiding compliance and trend analysis. Our detectors feature drift control under 2% per half-year for zero point and 3% for sensitivity. Integration with IoT cloud platforms allows remote access via 4G or WiFi modules. The GM810 and GM820 controllers support modular expansion, automatic addressing, and multi-circuit protection for stable operation in large-scale systems.
This setup detects leaks early, preventing accumulation in enclosed spaces. For instance, in oil refineries, fixed combustible gas detectors monitor methane levels continuously, triggering alarms at set thresholds.
Integration with Alarm and Control Systems
Fixed detectors connect to centralized controllers like our GM8 series, which use DCS principles for networking. They output signals up to 1.5 km via RS485, driving external devices such as sound-light alarms and shutdown valves. Relay outputs handle 2A at 30VDC, ensuring quick emergency responses. Explosion-proof enclosures with IP66 rating withstand harsh conditions from -40°C to 70°C.
When to Prioritize Fixed Models Over Portable
Choose fixed detectors for static, high-risk areas where portability adds no value. Portable units fit temporary tasks like maintenance checks, but fixed installations provide broader coverage.
High-Risk Industrial Scenarios
In chemical plants or power stations, fixed models cover multiple points simultaneously. Our GDE series supports pre-calibrated plug-in sensors for easy replacement without downtime. This reduces maintenance costs over years. Portable detectors require manual operation, risking oversight during shift changes.
For toxic gas monitoring, electrochemical sensors in fixed units detect low levels precisely. Compliance with fire CCC and explosion certifications ensures regulatory adherence.
Cost-Benefit Analysis for Long-Term Use
Initial costs for fixed systems are higher, but lifecycle savings come from low maintenance and extended sensor life. Infrared sensors last over 5 years, versus 1-3 years for catalytic types. Total ownership costs drop by 20-30% in continuous operations. Integration with our cloud platform enables predictive maintenance, minimizing false alarms.
Portable devices suit small-scale or outdoor use, but in fixed scenarios, they increase labor expenses. Prioritize fixed for facilities exceeding 500 square meters or with 24-hour staffing.
Our Fixed Gas Detection Solutions
Shanghai Gewei offers comprehensive fixed gas detection products. The GT-GDE820 model uses infrared principles for combustible gases, with 4-20mA output and LED status indicators. GT-GDC810 in the GDC series features catalytic sensors for broad application, including anti-poisoning variants.
GDA100V models provide compact, cost-effective options with remote control operation. Pair with GM820 controllers for scalable systems supporting up to hundreds of detectors. Our gas detectors integrate AI analysis for precise flame and gas detection, combined with IoT for real-time monitoring.
Accessories like voice-light alarms and backup power enhance reliability. These solutions meet diverse needs in demanding industries, ensuring long-term safety through robust, intelligent technology.
Selecting the right sensor principle is crucial. Catalytic combustion suits flammable gases, infrared for non-contact detection, and electrochemical for toxics. Our products allow mixing principles for optimized performance. With certifications and field-proven drift stability, Gewei’s fixed detectors deliver dependable protection.