Fire detector model 20-20 F with its ultra fast response is
designed to meet the two important requirements: fast
response time (less than 5 milliseconds) and high
reliability (immune to false alarms).
The 20-20 F has a continuously self-adjusting, pre-set
detection level. Its level of sensitivity is maintained
over a wide temperature range, and is independent of
background radiation.
The 20-20 F flame detector is an industrial version of the
military detector that is housed in an Ex housing and it
is produced and tested to the highest standards of
performance. The detector is sensitive to radiation in
two frequency ranges of the electromagnetic spectrum:
the infra red (IR) and the ultra violet (UV). Only
simultaneous sensing within these two ranges of
radiation will result in a detector output pulse.
The 20-20 F high speed ultra violet optical flame
detector is designed specifically for high speed
applications involving explosives and propellant fires,
invisible hydrogen flames and other hydroxy flames like
silane, ammonia etc.
• Less than 5 msec response time
• Highly immune to false alarm
• Distinguishes fire & vapor explosion from other non threatening radiation sources
• 90° / 70° cone of vision
• Designed & built to MIL specification
• Explosion proof meets Cenelec/ATEX requirements
• M.T.B.F. minimum 100,000 hours
• 3 year warranty
mechanical
Dimensions: 120 x 132 x 132mm
Weight: Aluminium 3.7Kg
Base 1.7Kg
Spectral response: UV: 0.185-0.260 micron IR: 2.5-3 micron
Response time: Max. 5 msec 5” (13cm) gasoline pan fire at a distance of 1 ft. (30cm).
Typical 5 sec for 1 sq.ft. (30X30)
gasoline pan fire at 20 ft. (6m).
Field of view: 90° horizontal, 70° vertical
Temperature range: Operating: -40°F to 160°F
Storage: -65°F to 185°F
Humidity: Relative humidity of up to 95%
for the operational temperature
electrical
Power supply: Operating voltage: 18-32 Vdc
Power consumption: Max. 70mA in stand-by
Max. 1300mA in alarm
Electrical connection: Standard two ¾ in. 14 NPT cable entries