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ASSOCIATED SAFETY PRODUCTS
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| HOMEPAGE EXPLOSION
PROOF FUME HOOD ALARM INSTRUCTION MANUALS AND SELL SHEETS Explosion
Proof Fume Hood Alarm manual Variable
Power Controller Sell Sheet |
Explosion Proof Alarm
Intended for use in laboratories that are classified as a
hazardous location, the explosion-proof low pressure fume hood alarm provides continuous
monitoring of the negative static pressure in the fume hood exhaust duct. During normal negative static pressure
conditions, the alarm illuminates a green indicator LED. When static pressure in the exhaust duct is
insufficient, an audible alarm sounds and a red LED indicator illuminates. To maintain the integrity of the certified
explosion proof instrument enclosure, the functionality of the test/reset
button is performed using a light sensor.
Covering the light sensor momentarily acknowledges the alarm and
silences the horn for 10 minutes. During
periods of darkness, the alarm functions normally but the test/reset function
is unavailable. An output relay is
provided to signal a remote alarm if needed. An additional output relay is provided with normally closed and
normally open contacts which may be used for connection to the building
systems. This relay activates in the
event of a loss of static pressure. Additionally, an input is provided which may be used by the
building system to mute the alarm during periods of intentional exhaust
shutdown or slow down. All electrical housings as well as pressure switch are UL or FM
approved for Class 1, Div 1, Groups B, C and D. XPA1 models are provided with a Class 1, Division 1, Group C and D
buzzer. XPA2 models are provided with a Class 1, Division 2, Group A, B, C
and D.
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