SensAlarm
Flex
–
Universal Gas Detection System
P a g e
22 | 82
Sensidyne Document No. 360-0257-01 (Rev A)
1.4.16.1. Infrared
Infrared sensors are used to detect Combustible gases or
vapors and Carbon Dioxide.
1.4.16.2. Catalytic Bead Combustible
Catalytic Bead sensors are used to detect Combustible gases
and vapors.
1.4.16.3. Sealed Electrochemical
Sealed electrochemical sensors are used to detect Toxic gases.
1.4.16.4. Oxygen
Oxygen sensors are used to monitor ambient Oxygen levels to
detect Oxygen Deficiency.
1.4.16.5. Sensor Assembly
The sensor assembly consists of a gas sensor attached to a Printed Circuit Assembly (PCA). An
EEPROM on the PCA contains essential sensor identification information that is communicated to
SensAlarm Flex during sensor installation. This information allows the sensor to be calibrated in the shop
or at Sensidyne and hot-swapped in the field without further calibration.
NOTE: Oxygen and Infrared Sensors must be calibrated at the altitude of intended use.
ETO, NO and HCl sensors are shipped attached to a battery to prevent extended sensor warmup
times. Batteries are designed to maintain biasing for up to 90 days. Battery boards should
remain attached to the sensor until just prior to sensor installation, and should be removed in
non-hazardous (non-classified) areas. The sensor can be unplugged from the battery board for up
to five (5) minutes without significant warmup time. Biased sensors unpowered for less than five
(5) minutes, may take 2 minutes to complete warmup once installed in the Gas Monitor.
Significant warmup time may be encountered with biased sensor unpowered for greater than five
(5) minutes.
Summary of Contents for SENSALARM FLEX
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