
The M40 is a multi-gas detector capable of monitoring CO, H₂S, O₂, and combustible gases, designed for use in confined spaces and a wide range of hazardous environments.
The intelligent, interchangeable sensors enable the M40 to detect changes in hazardous conditions beyond standard measurement ranges, as follows:
• Combustibles 0 to 100% LEL in 1% increments
• Oxygen 0 to 30% of volume in 0.1% increments
• Carbon Monoxide 0 to 999 ppm in 1 ppm increments
• Hydrogen Sulfide 0 to 500 ppm in 1 ppm increments
The M40 features LEL over-range protection
Specification
DIMENSIONS:
11.2 cm x 6.5 cm x 3.6 cm
11.2 cm x 6.5 cm x 3.6 cm
WEIGHT:
243 g (Weight with pump: 326 g)
RUNTIME:
18 hour – instrument (non-alarm)
12 hour – instrument with pump (non-alarm)

M40 Specification Sheet
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