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Gas Detection Finder · 1,400 products, every brand we carry

Single-Gas Monitors

102 single-gas monitors from every brand we carry, listed with what each manufacturer publishes, and live prices.

Pick a brand, gas, number of gases, sampling or battery; the list below narrows as you choose. Prices are live.

MSA 10071361 Single Gas Monitors, ALTAIR 5X Hydrogen Sulfide Detector
By type
Sample-Draw Monitors (426)Single-Gas Monitors (102)Replacement Sensors (88)Calibration Gas & Kits (88)Batteries & Chargers (47)Detector Tubes & Pumps (31)Breathing Air Testing (14)Multi-Gas Monitors (413)
By number of gases
4 gases Monitors (200)3 gases Monitors (195)2 gases Monitors (189)1 gas Monitors (153)5 gases Monitors (108)6 gases Monitors (85)
By battery and type
Sample-Draw Monitors with Li-Ion Batteries (264)Sample-Draw Monitors with Alkaline Batteries (85)Sample-Draw Monitors with Alkaline & Li-Ion Batteries (76)Single-Gas Monitors with Li-Ion Batteries (20)Single-Gas Monitors with Alkaline Batteries (16)Multi-Gas Monitors with Li-Ion Batteries (186)Multi-Gas Monitors with Alkaline Batteries (76)Multi-Gas Monitors with Alkaline & Li-Ion Batteries (73)Multi-Gas Monitors with Rechargeable Li-Ion Batteries (186)

102 products

Ratings and specifications are as published by each manufacturer. Tap a group to open it.

RKI Instruments43 products

Open the RKI Instruments page

BW Technologies / Honeywell Analytics42 products

Open the BW Technologies / Honeywell Analytics page

MSA15 products

Open the MSA page

Industrial Scientific2 products

Do not see what you need? Browse the category or call (925) 215-7337.

In plain words. A gas monitor is described by the gases it detects (LEL for combustibles, O2 for oxygen, H2S, CO, and so on), how many it detects at once, whether it samples by diffusion (air reaches the sensors on its own) or with a pump (sample draw, for checking a space before entry), how it is powered, and the approvals that let it be used in a classified area. All of these are the manufacturer's published specifications; alarm points and calibration intervals follow the manufacturer's manual.

Technical. Intrinsic-safety approvals are listed as the manufacturer prints them (UL or CSA Class I Division 1 Groups A–D, ATEX and IECEx Ex ia IIC T4 marks). Sensor ranges are quoted per gas (for example 0–100% LEL, 0–30% volume O2, 0–100 ppm H2S, 0–500 ppm CO; PID sensors for VOCs in ppm or ppb with the lamp energy in eV; IR sensors for CO2 or methane). Calibration gas is matched to the monitor's sensors and listed by concentration. Draeger detector tubes have their own finder page.

Ratings and specifications on this page are shown as published by the manufacturer or the named standard and describe performance in that standard's test. They are not a recommendation for any task. The employer's hazard assessment decides what protective equipment a job needs. Verify details against the manufacturer's current documentation before you buy.

The standard at a glance

Copied from the named standard or regulation and shown with its source; nothing in these tables is Bayshore's recommendation.

OSHA confined-space atmosphere limits
Condition (29 CFR 1910.146)Limit
Oxygen deficientBelow 19.5% oxygen
Oxygen enrichedAbove 23.5% oxygen
FlammableAbove 10% of the lower flammable limit (LFL)
ToxicAbove the substance's permissible exposure limit (29 CFR 1910 Subpart Z)
Approval mark (as printed by the manufacturer)Meaning
UL or CSA Class I, Division 1, Groups A–DIntrinsically safe for flammable gas and vapour atmospheres (North America)
ATEX / IECEx Ex ia IIC T4Intrinsically safe, gas group IIC, temperature class T4 (Europe / international)

Source: OSHA 29 CFR 1910.146 (permit-required confined spaces). Alarm set points and calibration intervals follow each manufacturer's manual. Draeger detector tubes have their own finder.

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