The MS104K family anchors this category: compact diffusion instruments with long working time, event records and man-down alarms, including the MS104K-S1 carbon dioxide build detailed below. Shop-listed family members such as the MS104K-S2 dual-gas build and the MS104K-L handheld methane leak detector extend the family; they are covered on this category page rather than on model pages.
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Models and resources in this range
Why one gas gets its own instrument
A dedicated single-gas unit is smaller, cheaper per worker and simpler to issue than a multi-gas instrument, and its alarm means exactly one thing. Fleets standardise on single-gas monitors for the known everyday hazard and keep multi-gas units for entry and permit work — the two categories complement rather than compete.
Diffusion sampling suits this class: no pump, no sample line, nothing between the atmosphere and the sensor but a grille. The trade is response distance — a diffusion monitor reads where the worker is, which is precisely the point of personal protection.
Choosing the target configuration
State the gas, the alarm thresholds in your site procedure, and whether event records must be downloaded for exposure files. Personal monitors in this range log events (the MS104K-S1 stores 1,000) and offload by infrared or dock, which is what turns a beeping badge into a documented control measure.
Send a target gas list, get a configuration
Quotations are built from the published parameters on this site. Tell us the gases, the ranges and the quantity — or the point schedule for a fixed project — and the reply comes back within 24 hours.
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