6000 Series Digital Gas Monitor/Controller
3.0 Installation
3.1 Monitor Placement
Coverage
Guidelines for placement of diffusion type monitors are based on
the reasonable delay for gas to get from the source to the sensor.
All monitor sensors combinations are created equal in this regard.
• For air quality control of exhaust emissions and
accumulations of toxic gases the generally acceptable
maximum radius of coverage is 50 feet (15 meters).
Approximately 7500 square feet (700 square meters).
• For leak detection of combustible gases, ammonia,
refrigeration gases the maximum radius is 30 feet (10 meters).
The radius of coverage of any monitor does not extend beyond
any obstruction that impedes natural circulation of air. This
includes walls, stairs, elevators, shelving with solid ll, tool
chests, etc. The sensor must “see” the area of coverage; if not,
additional monitors are required.
Mounting Heights
Mounting heights for gas monitors are based on their density,
relative to air. There are three groups;
1. Lighter than air and will be more concentrated near the
ceiling; hydrogen, methane (natural gas), ammonia.
Install at 1 to 3 feet from ceiling.
2. Similar density to air and will be diluted in air equally at
all levels; - carbon monoxide, nitrogen dioxide, hydrogen
sulde, oxygen, carbon dioxide. Install from 3 feet (1
meter) off oor to one half of the ceiling height. For vehicle
emissions carbon monoxide sensors combined with nitrogen
dioxide sensors are installed at 3 to 5 feet (1 to 2 meters)
from the oor when the ceiling height is 7 to 10 feet. If the
ceiling height is higher than 10 feet, example- for heavy
equipment, the carbon monoxide monitors are installed
