MSA Altair 5 Gas Detector

PN Individual to Setup

MSA Calibration Gas PN:

MSA Calibration Gas:
20ppm Hydrogen Sulfide
60ppm Carbon Monoxide
58% LEL Pentane (1.45% Volume Methane as a Simulant)
15.0% Oxygen
Nitrogen Balance


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From the Manufacturer:
The new MSA Altair 5 Multigas Detector raises the bar once again with 5-gas capability, more than 17 preprogrammed languages, high-resolution, crisp color display option, and MSA's exclusive MotionAlert and InstantAlert features. Many great features plus the outstanding durability and performance you expect from MSA.

Ideal for confined space applications, the MotionAlert feature, when enabled, activates a "man down" alarm if no motion is detected for 30 seconds. The InstantAlert feature allows users to manually activate an audible alarm to alert those around them to potentially dangerous situations.

Using a portable gas detector should never be a challenge! MSA has designed the Altair 5 Multigas Detector with the same ease-of-use logic to ensure that minimal user training, interaction, or maintenance, is required. The intuitive menu-driven display and 3 large and tactile buttons make operation easy - even while wearing gloves. Numerous customization options are offered to fit many budgets and experience levels, from personal monitoring and pre-entry checks within confined space to industrial hygienist use.

MSA's new generation of miniature catalytic combustion sensors will reliably detect up to 100% LEL of combustible gases, including many solvents. MSA's high-performing electrochemical duo-tox hydrogen sulfide/carbon monoxide sensor allows for an additional sensor slot.

Many other toxic sensor choices are available, including ammonia, chlorine, hydrogen cyanide, phosphine, and sulfur dioxide. A lithium-ion rechargeable battery provides enough runtime to cover double shifts.


Helpful Part Numbers:

  • Altair 5 Replacement O2 Sensor - 10046946

  • Altair 5 Replacement LEL Sensor - 10089116

  • Altair 5 Replacement COSH Sensor - 10089117

  • Logo display screen customization

  • MotionAlert and InstantAlert features standard

  • Triple alarms at 95 dB+

  • Galaxy Test System-compatible

  • Durable rubber/synthetic over-molding

  • Intuitive 3-button operation

  • Unit passes 6-foot drop test; IP65-rated for water/dust ingress

  • Real-time on-line monitoring capability with MSA Link Software

  • 2-year comprehensive warranty for standard models

MSA Altair 5 Default Alarm Set Points

Sensor Type Low High STEL TWA
Hydrogen Sulfide 10ppm 15ppm 15ppm 10ppm
Carbon Monoxide 25ppm 100ppm 100ppm 25ppm
Oxygen 19.5% 23.0% - -
LEL 10% 20% - -
Ammonia 25ppm 50ppm 35ppm 25ppm
Sulfur Dioxide 2ppm 5ppm 5ppm 2ppm
Nitrogen Dioxide 2.5ppm 5ppm 5ppm 2.5ppm
Chlorine Dioxide 0.1ppm 0.3ppm 0.3ppm 0.1ppm
Hydrogen Cyanide 4.5ppm 10ppm 10ppm 4.5ppm
Phosphine 0.3ppm 1ppm 1ppm 0.3ppm
Dichlorine 0.5ppm 1ppm 1ppm 0.5ppm



Combustible Gas (LEL)0-100%

Oxygen (O2)0-25% Vol

Hydrogen Sulfide (H2S)0-200 ppm

Drop test:6 feet

Housing:Rugged rubberized armor

Weight:1 lb

Dimensions (L x W x D):6.68" x 3.52" x 1.95" (rechargeable, pumped, with belt clip)
6.68" x 3.52" x 1.65" (rechargeable, diffusion, no belt clip)

Audible alarm:>95 dB at 1 ft

Visual alarm:2 ultra-bright LEDs

Vibrating alarm:Standard

MotionAlert feature:Standard

InstantAlert feature:Standard

Display size:1.79" x 1.39" high contrast, back-lit

Display option:Color


Display time adjustable

Charging time:<5 hrs

Operating temperature range:-20 deg. C to +50 deg. C

Humidity:15-90% RH non-condensing

Ingress protection:IP65

Data log:> 200 hrs

Event log:> 1000 events

Certifications:CE ATEX I I 2G*
EEx ia d IIC T4 –20°C to +50°C*
UL Class I, Division 1, ABCDFG
CSA C22.2 No. 157 Class I, Div. 1, Groups ABCD*
ANZ Ex ia s I/IIC T4 (Zone 0)*