A step up from the PM-100, the PM-400 is capable of detecting four gasses at the same time. Along with CO, O2, and H2S readings, the PM-400 provides workers with real-time LEL levels. This protects workers in a wide range of environments which can reduce long-term operating costs.

Alarm points can be configured on the sensor, and audible, visual, and vibrating alarms are available. Despite running on a battery, the PM-400 operates for up to 60 days on a single charge. This is an ideal sensor for contractors, first responders, or anyone working in confined spaces.

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General Specifications

Size4.48”(L) x 2.39”(W) x 1.6”(H) *with clip 11.37 cm x 6 cm x 4 cm
Weight8.0 oz. (227 g.) PM400-IR 8.3 oz. (235 g.) PM400-P
Sensor TypeField-replaceable sensors: LEL – Catalytic Bead (Pellistor) LEL – Infrared O2, CO, H2S – Electrochemical
BatteryRechargeable Li-ion
Runtime60 days continuous, IR (LEL) version 24 hours continuous, P (LEL) version
Event Logging30 Events, 30 Calibrations, 30 bump tests
Data LoggingTwo months - Continuous at 1 - minute intervals, 24 hours a day, 7 - days a week
IP RatingIP67 dust tight and water resistant
DisplayBacklit digital LCD display Real-time readings of gas concentrations Battery status Alarm notifications
AlarmsLCD Alarm Icon display, LCD Backlight Indicator LED Audible: 90 dB at 4 in. (10 cm)
Temperature-4°F to 122°F (-20°C to 50°C)
Humidity10% to 95% RH (Non-Condensing)
CertificationsUL & 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) UL Listed
Gas Options
CO0 - 500 ppm1 ppm
H2S0 - 100 ppm0.1 ppm
O20 - 30% Vol0.1% Vol
Combustible (IR & P)0 - 100 %LEL1% LEL
Alarm Levels / Calibration Gas Defaults
Name Model Number
PM LinkPm-Link

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