GD20 LPG, gasoline / petrol gas detector,
monitor and alarm
The GD20 Gas Vapor Monitor detects gas
vapors at 10%, 20% or 30% of the concentration required for an explosion
(LEL or Lower Explosive Limit). The desired sensitivity can be selected
from the front panel and stored in the non-volatile memory. When activated,
the GD20 built-in 85 dB alarm will sound and it will remove power to your
The alarm will continue to sound
as long as the sensor detects a dangerous concentration of gas vapor or
until the Wait button is pressed. If the alarm is silenced by the use of
the Wait button, the GD20 will automatically arm the alarm again as soon
as the gas vapor has subsided.
The GD20 uses new technology to lower
the power requirements for the sensor and the GD20 can be programmed to
put itself to sleep for further power conservation. The GD20 can be programmed
to be active continuously or wake up every 5 minutes for a sniff. If the
GD-20 senses a dangerous concentration of gas, it sounds the alarm, cuts
power to the LPG solenoid and deactivates sleep mode to continuously monitor
You can use the UP and DOWN buttons
on the GD20 to manually turn your LPG solenoid ON and OFF. You can also
program the GD20 to automatically turn off the LPG solenoid one hour after
you turn it on, just in case you forgot to do so yourself. You get a warning
beep and then have 5 minutes to press the UP button (if you need another
A built-in self test program checks
the electronics and calibrates the gas sensor(s) automatically in less
than one minute and reports any problems.
The GD-20 operates from any voltage
between 9.5 VDC and 33.0 VDC. The higher the voltage, the less current
In addition to the built-in 85 dB
alarm, the GD20 provides an alarm output that can be connected to the optional
LA-20 External Loud Alarm to provide an amazing 105 dB of volume. This
amount of noise can be heard for 1/4 mile or more.
The GD-20 comes pre-wired to one
combination LPG / Petrol / Gasoline sensor with 3 meters (10 feet) of cable.
A second LPG / gasoline / petrol sensor can be connected. Installation
requires only a screwdriver. An instruction manual and all mounting hardware
9.5 - 33.0 VDC
0.085 amps @ 13.8 VDC, 0.055 amps @
Power saver mode: Program to wake up
every 5 minutes for a sniff, cuts average current to .020 amps.
Front panel selectable 10%, 20%, or
30% LEL (Lower Explosive Level)
0 to 50 deg Celsius ( 32 to 122 deg
100 x 60 x 30 mm (4 x 2.4 x 1.2 inch)
Built-in 85 dB audible alarm. Can be
connected to optional External 105 dB Loud Alarm (LA-20)
Will automatically deactivate LPG solenoids
drawing up to 3 amps. GD20 may be used to turn solenoid on/off manually
as well. Auto shutoff after one hour can also be programmed.
One LPG / Petrol / Gasoline sensor
standard. Second sensor optional. Three meters (ten feet) of cable provided
with each sensor.
GD20 Gas Detector Internal Connection
This product was added to our catalog on Tuesday 01 January, 2002.