Fixed Nitrogen Oxides (NOX) Gas Detector, 0 to 20/50/100/500/1000 ppm

ATO fixed NOX gas detector is a stationary device designed to continuously monitor and detect the presence of Nitrogen Oxides (NO and NO2) in the environment. Nitrogen Oxides are harmful pollutants commonly found in industrial settings, power plants, and areas with heavy vehicle traffic.

Features

• Fixed NOX gas detector adopts high precision sensor for accurate gas leak detection.
• Nitrogen Oxides gas detector is equipped with 3-wire system 4-20mA analog output, relay output, RS485 output (optional).
• The Nitrogen Oxides gas monitor is compatible with various controlled alarms, PLC, DCS and other control system, and can be remote monitored.
• Explosion-proof design, fast, relaible and stable.
• Infrared ray controller can remote control the alarm point settings, zero calibration, and address modification.
• Two-stage alarm with sound and light, and the alarm point is settable.
• The industrial NOX gas detector has self-calibration function, and three standard keys will be used to realize on-site maintenance.
• Fixed Nitrogen Oxides gas detector can output one or two on-off signals, can drive ventilator, solenoid valve or other external devices.

Specification

Notes

Regarding the flow rate for gas detectors, there are 2 types:

• Pump-Suction Type: Equipped with a built-in pump, with a flow rate of 600 mL/min. (Models: GD200, GD400, GD600)
• Diffusion Type: Not equipped with a built-in pump, with a flow rate of 300 mL/min. (Models: GD300, GD500, GD800)

If you require a customized flow rate, please let us know your specific requirements. We will evaluate whether customization is possible. A flow rate that is too high or too low can affect measurement accuracy, so we recommend using an appropriate flow rate for your application.

Flow rate only needs to be considered when sampling gas from pipelines. For measuring gas concentrations in normal ambient air, you do not need to consider the flow rate. To measure confined spaces such as pipelines, please get in touch with us and provide the detailed conditions of use.

Dimensions (Unit: mm)

Installation Guide

The following precautions apply when connecting the GD300 series fixed gas detector to a pipeline:

1. Working pressure should be stable at 1 bar ±10%, and the flow rate should be controlled at 300 mL/min.
2. Working temperature is -20°C to +50°C.
3. Working humidity is 0–95% RH. When the humidity is above 60% RH, it is recommended to use a dehumidifier or add a filter. When the humidity is above 95% RH, the gas is essentially saturated with water, making measurement impossible.
4. The gas detector should be installed indoors. If it is installed outdoors, a rain cover should be added to protect the entire instrument.
5. For the second pipeline connection method of the GD300 gas detector, the pipe-mounted installation, the detector mounting thread size is M45 × P2.0. During installation, hold the detector with both hands, keeping the sensor parallel to the mounting thread. Align it with the threaded port, rotate the detector clockwise, and install it in the desired position. To prevent gas leakage at the threaded connection, an appropriate amount of thread seal tape can be wrapped around the sensor head thread before installation.

***Other Common Gases and Ranges Available for Fixed Gas Detectors

Note: Some common gases and the measuring ranges are listed in the above table. For more information, please feel free to contact us.

Details

Tips: Where should fixed NOX gas detectors be installed?

Fixed NOX gas detectors should be installed in locations where nitrogen oxide gases are likely to accumulate, ensuring optimal safety and monitoring efficiency. Key areas include:

• Near Sources of Emission: Position detectors close to potential Nitrogen Oxides emission sources such as boilers, furnaces, engines, and industrial processes that involve combustion.
• Ventilation Systems: Install detectors in HVAC systems and exhaust ducts to monitor and control indoor air quality.
• Low-Lying Areas: Since NOX gases can be heavier than air, placing detectors at lower levels can help in the early detection of leaks.
• Enclosed Spaces: Areas like basements, tunnels, or enclosed parking garages where Nitrogen Oxides can accumulate due to poor ventilation should have detectors.
• Entry and Exit Points: Place detectors near doors, windows, and other openings to monitor NOX entering or leaving confined spaces.

Regular maintenance and calibration are essential to ensure accurate detection and response to NOX gas levels. Proper installation in these strategic locations enhances safety and compliance with environmental regulations.