Single channel gasoline fume detector, with the same features as the M-1:

• High-tech styling
• Compact size
• Circuitry Test
• Alarm horn Mute functions
• Indicator lamp automatically increases in brightness during daylight and softens at night
• Standard two-inch display unit with gasoline sensor and twenty feet of plug-together lead
• Can also detect high concentrations of battery hydrogen or engine exhaust.

The MB-1 adds a 10 amp relay to automatically start the bilge blower fan should gasoline fumes be detected. Installation requires only the addition of two wire leads