19
FIGURE 12
Available Models
Features
An external alarm light with combination audible horn is an electronic device
designed to alert operators and other personnel both visually and audibly to a
specific danger.
Most commonly an external alarm light and horn is used with a gas leak detector
to warn of gas leaks before entering a structure or room.
Single compact unit
Wall mounting
Rotating strobe light with red lens
90 dB Audible horn
Weather resistant
GA-AL-110 (110VAC)
GA-AL-220 (220VAC)
The external alarm light & horn is an optional accessory for use with all Hydro
Instruments gas leak detection equipment. The alarm light connects to a relay
inside the gas detector monitor. This can be a sensor specific relay or a common
relay.
PWR
L
N
NO
CO
L
N
Relay
Light
L = Line
N = Neutral
NO = Normally Open
CO = Common
NC = Normally Closed
NC
Alarm Light Wiring—Normally Open Relay Circuit
