• Uses 1/4-inch (6.35 mm) OD tubing. The tubing must be
compatible with the sampled gas. Sample tubing must also be
3/16" ID for 100-foot lines to prevent "Lo Flo."
• It takes a maximum of 30 seconds for the sample gas to reach
the Toxgard II Gas Monitor when 50 feet (15.25 meters) of
tubing is used:
• To decrease this time, shorten the sample line length.
• It is generally good practice to make the sample line as
short as possible.
• Depending on the gas characteristics, the end of the sampling
tubing and the sample inlet should be mounted to best optimize
sampling of that particular gas. Consult your architect, facility
manager or safety engineer for guidance in proper placement of
the sampling tube inlet.
• Testing for ventilation patterns is useful in establishing sample
inlet location. Smoke tubes (P/N 458481) are useful in
measuring the direction and rate of air flow to determine which
areas to monitor.
• A particulate filter (purchased separately) should be used at the
inlet end of the sample line to help prevent dirt and dust from
clogging the sample line. This filter must be compatible with the
gas being sampled.
• It is recommended that a stainless steel or Teflon* sample line
be used for monitoring gases that are highly reactive such as:
• Nitrogen Dioxide
• Sulfur Dioxide.
• Use only a Teflon sample line for the following gases:
• Chlorine
• Chlorine Dioxide
• Hydrogen Chloride
• Ammonia.
• With the above gases, do not use an end-of-line filter. The
sample line should be inspected periodically and replaced if
dirty. Do not attempt to clean the sample line by applying
compressed air.
NOTE: Do not run the sample tubing in water or across
areas of vibration, doorways, man ways or access
ways; otherwise, a sample tubing leak or tripping
hazard may result.
4. Using suitable hardware (not supplied):
Chapter 1, Set-up
1-7
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