Skip to content Skip to navigation menu
Live Chat

M-2A Fuel Vapor Monitor


Extended Product Protection with PLUS Plan!

Model # 308924 | Mfg # M-2A-R
In stock online.

A state-of-the-art fuel-vapor monitor with two-channel monitoring capability for the addition of a second sensor. When potentially dangerous fumes are detected, an alarm sounds and a warning light is illuminated. The unit consists of a monitor display module and MS-2 gasoline and propane sensor.

  • Types of Vapor Monitored: Gasoline and propane
  • Alarms: 85dB audible horn
  • Minimum Vapor Level for Activation: 18-20% LEL@70F
  • Monitoring Algorithm: Instantaneous readings
  • Display Size: 5" x 4"
  • Controls: 2 test buttons, 1 mute button
  • Power Requirements: 12V DC
  • Sensors Required/Included: Built-in; optional MS-2 second channel
  • Sensors Monitored: One included and one additional optional MS-2 Sensor
  • Case Dimensions: 4-3/4"W x 3-3/4"H x 1"D
  • Mounting Hardware Included/Required: No: requires two in-line fuse holders, one 1-ampere fuse, one 1 1/2 ampere fuse, wire nuts for #16 and #20 gauge wire
  • Wiring Hardware Included: 20' sensor wire

M-2A Fuel Vapor Monitor

Controls 2 Test Buttons; 1 Mute Button
Dimensions 4 3/4" Width x 3 3/4" Height x 1" Depth
Features Internal Sensor
Second Sensor
Sound Signal 75 Decibel Audible Horn
Type Gasoline
Voltage 12 Volts DC
Warranty Details One Year
Wire Lead Length 20 Foot Sensor Wire

West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.


by PowerReviews
Fireboy Xintex M-2A Fuel Vapor Monitor

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to top

(2 of 2 customers found this review helpful)


Increases the Value of your Gasoline-Powered Boat

By jdb

from Montreal, QC

About Me Casual/ Recreational

Verified Reviewer


  • Good Performance
  • Reliable
  • Weather Resistant


    Best Uses

    • Personal Crafts
    • Small Boats

    Comments about Fireboy Xintex M-2A Fuel Vapor Monitor:

    I've had this installed for over 2 years now, and I am VERY happy with it.

    I have an old Volvo MB12A, and although this is a reliable engine, it has a new after-market carburator that floods easily. I put one lead of the detector in the engine compartment just under the carb, and it works perfectly, warning me if i flood the carb. Long-term, i will fix the flooding problem, but the most important thing is how it reassures people.

    The first thing most people say about gasoline engines is "Isn't it Dangerous?" by pointing out the fume detector, I reassure future owners if i want to sell the boat. Having a second lead which i can install in the galley has allowed me to buy a butane stove (i store the cannisters in a vented compartment when not in use), knowing that i am covered for any dangerous fumes in the boat.

    • Was this a gift?:
    • No

    Displaying review 1

    Back to top