PortaSens II
Gas Detector
C16 Leak Detector
O & M Manual
Rev. G, 11/07
- 10 -
RESPONSE TIME
The response time for the gas sensors varies depending on the particular type of sensor.
The following table shows the typical response times for sensor modules available for the C16
detector. The table provides typical time constants to 66% and 90% of exposure. This data
should be used to determine how long you need to measure in a particular location to be sure you
have a representative reading.
SENSOR TYPE
66% RESPONSE 90% RESPONSE
Oxidant Sensors (except H
2
O
2
)
20 seconds
60 seconds
Hydrogen Peroxide
40 seconds
120 seconds
Ammonia
30 seconds
120 seconds
Carbon Monoxide
10 seconds
30 seconds
Hydrogen
20 seconds
60 seconds
Oxygen
15 seconds
45 seconds
Nitric Oxide
10 seconds
20 seconds
Phosgene
70 seconds
300 seconds
Hydrogen Chloride
50 seconds
240 seconds
Hydrogen Fluoride
50 seconds
240 seconds
Hydrogen Cyanide
40 seconds
120 seconds
Hydrogen Sulfide
20 seconds
60 seconds
Nitrogen Dioxide
10 seconds
40 seconds
Sulfur Dioxide
10 seconds
40 seconds
Hydride Gases
30 seconds
70 seconds
Hydrocarbon Gases
40 seconds
90 seconds
