Spectrex 20/20L (LB) - UV/IR Flame Detector - Manual (Page 15)

Spectrex Inc. - SharpEye TM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004
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3. Performance
3.1 Detection Sensitivity
Detection sensitivity is the maximum distance at which the detector will reliably
detect a specific size of fire & typical type of fuel (standard fire).
Standard Fire:
Standard fire is defined as a 1ft x 1ft (0.3m x 0.3m) Gasoline pan fire with max.
Wind speed of 6.5ft/sec (2m/sec).
Sensitivity Ranges:
The detector has three response levels:
1. Warning (Pre-alarm)
2. Alarm
3. Saturated Signal
For some typical ambient conditions the Zeta parameter as defined in NFPA 72
for the detector is 0.01 (1/meter).
Note:
Zeta parameters may vary significantly with changes in temp, air pressure,
humidity, visibility conditions, etc.
Response Time:
The typical response time of the detector is 3 seconds for 1 sq. ft. gasoline fire,
and 20 msecs for saturated signal, which is defined as a 5” diameter Gasoline
fire from a distance of 12”.