MPA mPower Electronics

Date:2025-6-26     Hits:49

MPA mPower Electronics  POLI MP400P Inert
Multi-Gas Monitors for Inert Gas Operations


The POLI MP400P multi-gas detectors allow custom configurations for inert gas applications by use of inverted
oxygen alarms and non-dispersive infrared (NDIR) LEL sensors. While typical oxygen low alarms trigger when O2
concentrations are below breathing levels near 20.9%, inverted alarms trigger when O2 levels are above the low or
high alarm limits (default at 4% and 5%), and thus are in alarm in breathable air. A simple one-button operation
allows switching between Normal O2 Mode and Inert Gas Mode. Because catalytic combustion LEL sensors are
not functional without O2 present, NDIR sensors are used for inert gas applications, as these sensors do not require
oxygen. The built-in pump allows remote sampling from 100 feet or more using 1/8” i.d. tubing. Other sensor
options include photo-ionization detector (PID) for ppm level volatile organic compounds (VOCs), CO2 by NDIR,
and a full range of electrochemical (EC) toxic gas sensors including carbon monoxide (CO), hydrogen sulfide
(H2S), ammonia (NH3), hydrogen cyanide (HCN), hydrogen (H2), sulfur dioxide (SO2), and others. The MP400P
has rugged construction and easy-to-learn 2-button operation. The unique Man-Down alarm feature notifies team
workers wirelessly if a user becomes incapacitated.


Features, Functions and Benefits
• Quick, one-button switching between Normal O2 Mode and Inert Mode
• Inverted oxygen alarms in Inert Mode
• 100+ foot sampling distance using 1/8-in I.d. tubing
• Wide selection of “plug-and-play” Smart Sensors (carry calibration data)
• 16-Hour rechargeable Li-ion battery (NDIR/PID/ECs with pump)
• 360-Degree LED alarm bar and Man-Down alarm; Flip screen
• USB Micro charger & communications cable
• Optional POLI MonoDock station for automated bump test and calibration
• 6 Months continuous datalogging
• Durable double shot outer case
• Wireless team communication available (see mSquad & mPlatoon datasheets)


Detector Specifications
Size 5.74 x 3.31 x 1.65 in
(140 x 84 x 42 mm)
Weight 15.5 oz (435 g)
Sensors About 30 interchangeable and field-replaceable sensors
including PID for VOCs, EC for Toxic and O2,
and NDIR for LEL%, Vol% & CO2
Response
Time (t90)
• 15 seconds (CO/H2S/O2)
• Others vary – see TA Note 4 
Battery Rechargeable Li-ion pack: 16 hours with pump
Direct
Readout
• Real-time reading of gas concentration
• PID measurement gas and correction factor,
• Visual compliance indicator
• Battery status
• Datalogging on/off
• STEL, TWA, peak and minimum values
• Man-Down alarm on/off
Display 128 x 128 graphical LCD, 1.77 x 1.73 in (45 x 44
mm), with LED backlight for enhanced readability.
Automatic screen “flip” feature
Keypad 2 Operation keys
Sampling Bulit-in pump (MP400P) draws 100 feet using 1/8”
i.d. tubing
Calibration Manual calibration or automated using POLI Mono-
Dock
Alarms • Audible (95 dB @ 30 cm)
• Visual (flashing bright red LEDs)
• Vibration
• On-screen indication of alarm conditions
• Man-Down alarm with pre-alarm
• Panic Alarm (manual)
Datalogging Continuous datalogging (6 months for 4 sensors at
1-minute intervals, 24 hours/day and 7 days/week)
Charging and
Communication
Charging, data download, instrument setup and
firmware upgrades on PC or laptop via PC comm,
cable, or MonoDock.
Temperature -4° to 122°F (-20° to 50°C)
Humidity 0% to 95% Relative humidity (non-condensing)
IP Rating IP-65 (pump versions); IP-67 (diffusion versions)


Safety Certifications
Class I, Div 1, Group ABCD
T4, -20°C ≤ Tamb ≤ +50°C
IECEx Ex ia IIC T4 Ga
II 1G Ex ia IIC T4 Ga
European Conformity


EMC/RFI EMC directive: 2014/30/EU
Warranty • 2 Years on instruments
• 2 Years on sensors for LEL, LEL/Vol, O2, CO,CO2, H2S, SO2, HCN, NO, NO2, and PH3
• 1 Year on other sensors


Sensor Options
PID
0-200 ppm
0-2000 ppm
0-10000 ppm
0.01 ppm
0.1 ppm
1 ppm
Oxygen (O2) Lead Wool
Lead-Free
0-30%Vol
0-30%Vol
0.1%Vol
0.1%Vol
NDIR Methane (LEL%)* 0-100%LEL 1%LEL*
NDIR Methane (Vol%)* 0-100%Vol 0.1%Vol*
Dual-Range LEL%/Vol%* 0-100%Vol 1%LEL*
NDIR Dual-gas CH4
Methane + CO2 CO2
0-100%LEL
0-50000 ppm
1%LEL*
10 ppm€
NDIR Bio-gas CH4
Methane + CO2 CO2
0-100%VOL
0-100%VOL
1%VOL
1%VOL
CO2 (Carbon Dioxide) 0-50000 ppm 10 ppm€
CO (Carbon Monoxide) 0-1000 ppm 1 ppm
H2S (Hydrogen Sulfide)
0-100 ppm
0-1000 ppm
0.1 ppm
1 ppm
CO + H2S CO
H2S
0-500 ppm
0-200 ppm
1 ppm
0.1 ppm
SO2 + H2S SO2
H2S
0-20 ppm
0-100 ppm
0.1 ppm
0.1 ppm
NH3 (Ammonia)
0-100 ppm
0-500 ppm
1 ppm
1 ppm
Cl2 (Chlorine) 0-50 ppm 0.1 ppm
ClO2 (Chlorine Dioxide) 0-1 ppm 0.01 ppm
H2 (Hydrogen) 0-1000 ppm 1 ppm
HCl (Hydrogen Chloride) 0-15 ppm 0.1 ppm
HF (Hydrogen Fluoride) 0-20 ppm 0.1 ppm
HCN (Hydrogen Cyanide) 0-100 ppm 0.1 ppm
NO (Nitric Oxide) 0-250 ppm 1 ppm
NO2 (Nitrogen Dioxide) 0-20 ppm 0.1 ppm
N2O (Nitrous Oxide) 0-1000 ppm 10 ppm†
PH3 (Phosphine)
0-20 ppm
0-1000 ppm
0.01 ppm
1 ppm
SO2 (Sulfur Dioxide)
0-20 ppm
0-100 ppm
0.1 ppm
0.1 ppm
ETO (Ethylene Oxide) 0-100 ppm 0.1 ppm
CH3SH (Methyl Mercaptan) 0-10 ppm 0.1 ppm
THT (Tetrahydrothiophene) 0-40 ppm 0.1 ppm
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