AimSafety PM400 Series Multi Gas Monitor

AimSafety PM400 Series Multi Gas Monitor



The innovative new AimSafety PM400 4-gas portable monitor brings enhanced convenience and flexibility to gas detection in hazardous environments. The ergonomic PM400 diffusion gas monitor simultaneously detects up to four gases, including hydrogen sulfide (H2S), carbon monoxide (CO), oxygen (O2) and combustibles (LEL).

  • Easy-to-read LCD display
  • Single button operation
  • Rugged, high visual housing
  • IP67 dust tight & water resistant


AimSafety’s PM400 is easy to use and delivers continuous visibility of gas concentrations for faster, more informed decisions that help protect workers and operational assets which can increase revenue and productivity.
The PM400 LCD display provides real-time gas concentrations and allows plant managers or workers to set high and low alarm set-points for each sensor, and STEL, and TWA alarm set-points for toxic gases. The PM400’s audible, visual and vibrating alarms alert the user of unsafe gas concentrations. Standard sensors include: Carbon Monoxide, Hydrogen Sulfide, Oxygen.


  • Confined space entry
  • Oil & gas
  • Heavy metal & steel
  • Chemical plants
  • Pulp & paper
  • Municipalities
  • Food & beverage
  •  Contractor / Construction
  • First Responder


Size:  4.48”(L) x 2.39”(W) x 1.6”(H) *with clip 11.37 cm x 6 cm x 4 cm

Weight:  8.3 oz. (235 g.) PM400-P

Sensor Type:  Field-replaceable sensors: LEL – Catalytic Bead (Pellistor)  O2, CO, H2S – Electrochemical

Battery:  Rechargeable Li-ion

Run Time:  24 hours continuous

Event Logging:  30 Events, 30 Calibrations, 30 bump test

Data Logging:  Two months – Continuous at 1 – minute intervals, 24 hours a day, 7 – days a week

IP Rating:  IP67 dust tight and water resistant

Display:  Backlit digital LCD display Real-time readings of gas concentrations Battery status Alarm notifications

Temperature:  -4°F to 122°F (-20°C to 50°C)

Humidity:  10% to 95% RH (Non-Condensing)

Certifications:  UL & CSA Class I, Division 1, Groups A, B, C, D, T4 Class I, Zone 0, AEx ia IIC T4 Ga IECEx Ex ia IIC T4 Ga (PM400-IR) Ex da ia IIC T4 Ga (PM400-P)

Warranty:  Two Years