4V 
Gasoline Fume Detector with Dual Channel and Blower Control - 12/24V
The Dual Channel Gasoline Fume Detector is an effective means to monitor gasoline fumes in an engine compartment, fuel tank storage area or in other areas where gasoline fumes might accumulate.  
Complete system includes Blower Control Relay, easy installation and precise monitoring.  
Features:
Simple Installation
Audible and visual alarm to indicate LEL (Lower Explosive Level) presence 
Monitors two (2) separate areas simultaneously 
Automatically activates bilge blower
Technical Specifications:
Operating Temperature: -40° to 185°F (-40° to 85°C)
Current Draw Nominal - 55mA 
Current Draw Maximum - 150mA
Operating Voltage - 9 to 30V DC
Alarm Horn - 68 dB
Display Style - Square with Black Bezel
Display Dimensions - 2-5/8" x 2-5/8" (6.7 x 6.7 cm)
Cutout Dimension - 2-1/8" (5.4 cm) round hole
In the Box:
Fume Detector
Fuel sensors x two (2)
20' Extension Cable x two (2)
Blower Relay x one (1)
Instruction manual
*Sold as an Individual