Sensidyne AP-20S Instruction Manual - • Remote Measurement
© 2003 Sensidyne, Inc.
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Measurement under Special conditions
• Remote Measurement
A rubber extension hose (shown below) is used for remote detection
of potentially harmful gases prior to entering a confined space such
as a manhole or tank. The extension hose is placed between the de-
tector tube and the pump to eliminate the need for purging. The rub-
ber extension hose is available in lengths of 5 or 10 meters.
• High Temperature Gas Measurement
The allowable temperature range for detector tubes is generally, 0
°
to 40
°
C. When measuring gases at temperatures outside of 0
°
to 40
°
C, collect a volume of gas into a container, transport it to a moderate
area (i.e., indoors) and allow it to equilibrate. Then draw the sample
from the container. Care must be taken to choose a container of a
material that is compatible with the target gas. (e.g., A glass syringe
of 100cc or 200cc or a Tedlar bag of 1 to 2 liters is a suitable con-
tainer). When flue gas or other high temperature gas is sampled, use
the Hot Air Probe.