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POLI MP400P 1 to 5 Multi Gas Detector with Pump

The POLI MP400P multi gas detector offers 1 to 5 gas monitoring of toxic gases, oxygen, combustibles, carbon dioxide and volatile organic compounds (VOCs).

For pricing, please call 1-800-952-3293 or email



The POLI MP400P multi gas detector offers 1 to 5 gas monitoring of toxic gases, oxygen, combustibles, carbon dioxide and volatile organic compounds (VOCs). The POLI MP400P is an advanced model with built in pump that allows a full selection of sensors for a wide range of application, including Confined Space Entry. Smart sensors carry calibration and ID information with them for quick exchange in the field during Hazmat response.

Specific sensors include electrochemical for carbon monoxide, hydrogen sulfide, ammonia, hydrogen cyanide, hydrogen chloride, hydrogen fluoride, chlorine, chloride dioxide, nitric oxide, nitrogen dioxide, sulfur dioxide, ethylene oxide, methyl mercaptan and others. Also available are pellistor for LEL level combustibles, non-dispersive infrared (NDIR) for Vol% level carbon dioxide or hydrocarbons and photo ionization detector (PID) for ppm level VOCs. Use of combination CO/H2S or SO2/H2S sensors allow up to 5 gas measurement in a single instrument. The POLI Multi Gas Detector has rugged construction and easy to learn 2 button operation. The unique Man-Down alarm feature notifies nearby workers if the user becomes incapacitated.

Tags: ammonia gas detector, carbon monoxide gas detector, chlorine gas detector, voc gas detector 



  • Wide selection of plug and play smart sensors
  • 16 hour rechargeable Li-Ion battery
  • Pump off switch saves battery for longer operation time
  • Automatic low fault on pump
  • 360° LED alarm bar
  • Man-Down alarm
  • USB Micro charger & communications cable
  • Flip screen
  • 6 months continuous datalogging
  • Durable double shot outer case


Detector Electrochemical for Toxic gases and Oxygen
Pellistor: Combustible
PID: Volatile organic compounds
NDIR: LEL, VOL% and carbon dioxide
Battery Rechargeable Lithium-ion
Operating Periods Diffusion: Up to 16 hours
Pump: 12 hours
Graphic Display 128 x 128 graphical LCD, 1.77 x 1.73″
LED backlight for enhanced display
Automatic screen “flip” feature
Keypad Two button operation
Direct Readout Real time reading of gas concentrations
PID measurement of gas and correction factor
Battery status
Visual compliance indicator
Datalogging on/off
STEL, TWA, peak and minimum values
Man-Down alarm on/off
Alarm Audible: 90 dB @ 30 cm
Visual: Flashing bright red LEDs
On-screen indication of alarm conditions
Man-Down alarm
EMI/RFI EMC directive: 2004/108/EC
IP Rating Pump: IP-54
Diffusion: IP-67
Data Logging Continuous datalogging, 6 months for 4 sensors at 1 minute intervals, 24 hours/day and 7 days/week
Communication & Charging Charging, data download, instrument setup and firmware upgrades on PC or laptop via PC Comm, cradle, travel charger
Sampling Built in pump or diffusion
Calibration Manual calibration, CaliCase option allows automatic bump test and calibration on up to 4 units simultaneously
Temperature -4° to 122°F
Humidity 0-95% rH, non-condensing
Size 5.74″ x 3.31″ x 1.65″
Weight 15.5 ounces
Approvals Class I, Div 1, Groups A, B, C, D

Sensor Specifications

Combustible Gas (LEL%)
0-100% LEL
Carbon Monoxide
0-1,000 ppm
1 ppm
0-1,000 ppm, Low H2
1 ppm
Hydrogen Sulfide
0.1-100 ppm
0.1 ppm
0-1,000 ppm
1 ppm
0.1-2,000 ppm
0.1 ppm
Hydrocarbons NDIR (Vol%)
0-100% Vol
0.1% Vol
0-5% Vol, 1-200% LEL
0.1% Vol
Carbon Dioxide
50-50,000 ppm
100 ppm
Carbon Monoxide/Hydrogen Sulfide
CO: 1-500 ppm
H2S: 0.1-200 ppm
CO: 1 ppm
H2S 0.1 ppm
Sulfur Dioxide/Hydrogen Sulfide
SO2: 0.1-20 ppm
H2S: 0.1-100 ppm
SO2: 0.1 ppm
H2S: 0.1 ppm
0-100 ppm
1 ppm
0-500 ppm
1 ppm
0.1-50 ppm
0.1 ppm
Chlorine Dioxide
0.01-1 ppm
0.01 ppm
1-1,000 ppm
10 ppm
Hydrogen Chloride
0.1-15 ppm
0.1 ppm
Hydrogen Fluoride
0.1-20 ppm
0.1 ppm
Hydrogen Cyanide
0.1-100 ppm
1 ppm
Nitric Oxide
1-250 ppm
1 ppm
Nitrogen Dioxide
0.1-20 ppm
0.1 ppm
0.01-20 ppm
0.01 ppm
Sulfur Dioxide
0.1-20 ppm
0.1 ppm
0.1-100 ppm
0.1 ppm
Nitrous Oxide
100-1,000 ppm
10 ppm
Methyl Mercaptan
0.1-10 ppm
0.1 ppm
Ethylene Oxide
1-100 ppm
0.1 ppm


Ordering Information

Each POLI Multi Gas Detection instrument includes monitor and sensors as specified, SS alligator clip, rechargeable Li-Ion battery, calibration hose, instructions and quick reference guide. Many other configurations available, call for details. For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email

Catalog No.
POLI 4 Gas Detector, LEL, O2, CO, & H2S Sensors, Internal Pump MPA1-81A601-02040
POLI 5 Gas Detector, PID, LEL, O2, CO, & H2S Sensors MPA1-81AAA6-010L0
POLI 5 Gas Detector, NDIR CO2, LEL, CO, H2S, O2 Sensors MPA1-81A3A6-010L0


POLI 4 gas detector literature
Tech Note 3 – Calibration Frequency
Tech Note 4 – Sensor Technical Data Summaries
Tech Note 5 – Gas Detectors for Firefighters and Hazmat Teams

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