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POLI Multi-Gas Detector

Professional gas detection and alarm systems


The POLI multi-gas detectors (MP400/MP400P/MP400S) offer 4- or 5-gas monitoring of oxygen (O2), combustibles (LEL), toxic gases, carbon dioxide (CO2), and volatile organic compounds (VOCs). The MP400 and MP400P are basic models with O2, LEL, carbon monoxide (CO) and hydrogen sulfide (H2S) configuration in both diffusion or pumped versions, for confined space entry compliance. The MP400S adopts a full range of sensor selection, e.g. electrochemical (EC), pellistor, non-dispersive infrared (NDIR) and photo-ionization detector (PID) in a pumped model. Use of a combined CO/H2S sensor in the MP400S allows up to five gases to be monitored. An option of wireless communication enables real-time monitoring of gas readings and alarm status including man down alarm from remote locations for better visibility and faster response.

Product Features

  • Available in diffusion or pump version
  • Man Down Alarm with real-time remote wireless notification
  • IP-65/67 water and dust resistant case
  • Real-time gas concentration readings and alarm status enabled by state-of-the-art wireless technology
  • Large graphical display icon-driven user interface through intuitive, simple-to-operate two-button user interface
  • Easy access to pump, sensor, filter and battery
  • Over 30 interchangeable sensor options, including PID for VOC, NDIR and catalytic for combustibles, and NDIR for CO2
  • Intelligent sensors store calibration data, so they can be swapped in the field

Detector Specifications

Size 5.74 x 3.31 x 1.65 in (140 x 84 x 42 mm)
Weight 14 oz (400 g)
Sensor Over 30 interchangeable and field-replaceable sensors including PID for VOCs, EC for Toxic and O2, Pellistor for LEL, and NDIR for LEL and CO2
Battery Rechargeable Li-ion pack:18 hours in diffusion with no wireless, 16 hours in diffusion with wireless, 12 hours in pump with no wireless, and 10 hours in pump with wireless
Direct Readout Real-time reading of gas concentration, PID measurement gas and correction factor, Man Down Alarm on/ off, individual compliance indicator, battery status, datalogging on/off, wireless on/off and reception quality STEL, TWA, peak and minimum values
Display 128 x 128 graphical LCD, 1.77 x 1.73 in (45 x 44 mm), with LED backlight for enhanced display readability. Automatic screen “flip” feature.
Keypad 2 operation keys
Sampling Bulit-in pump or diffusion
Calibration Manual or automatic bump test and calibration with CaliCase (separate orders)
Alarm Wireless remote alarm notification, audible (90dB@750px), vibration, visual (flashing bright red LEDs), and on-screen indication of alarm conditions Man Down Alarm with pre-alarm and real-time remote wireless notification
Datalogging Continuous datalogging (6 months for 4 sensors at 1 minute intervals, 24 hours a day and 7 days a week)
Charging and Communication Charging, data download, instrument setup and firmware upgrades on PC or laptop via PC comm, cradle, travel charger, or CaliCase Wireless data and alarm status transmission via built-in RF modem (optional)
Temperature -4° to 122°F (-20°C to 50°C)
Humidity 0% to 95% relative humidity (non-condensing)
IP Rating IP-65 (pump); IP-67 (diffusion)
Safety Certifications UL/cUL: Class I, Div 1, Group A, B, C, D
T4, -20°C ≤ Tamb ≤ +50°C (pending)
EMC directive: 2004/108/EC
Warranty 2-year including most sensors

Sensor Options

Sensor Range Resolutions
PID 0-1000ppm 0.1ppm
Oxygen (O2) 0-30%Vol 0.1%Vol
Combustible (LEL) 0-100%LEL 1%LEL
Carbon Monoxide (CO) 0-1000ppm 1ppm
Hydrogen Sulfide (H2S) 0-100ppm 0.1ppm
Ethylene Oxide (ETO) 0-100ppm 0.1ppm
Hydrogen Fluoride (HF) 0-10ppm 0.1ppm
Nitric Oxide (NO) 0-250ppm 1ppm
Methanethiol (CH3SH) 0-10ppm 0.1ppm
Sulfur Dioxide (SO2) 0-20ppm 0.1ppm
Hydrogen Cyanide (HCN) 0-100ppm 1ppm
Ammonia (NH3) 0-50ppm 1ppm
Phosphine (PH3) 0-5ppm 0.01ppm
Chlorine (Cl2) 0-10ppm 0.1ppm
Nitrogen Dioxide (NO2) 0-20ppm 0.1ppm
Hydrogen Chloride (HCl) 0-15ppm 0.1ppm
Chlorine Dioxide (ClO2) 0-1ppm 0.01ppm
Acetaldehyde (C2H4O) 0-20ppm 0.1ppm
Combustible (Vol%) 0-100%Vol 0.1%Vol
Carbon Dioxide (CO2) 0-50000ppm 100ppm
CO+H2S CO: 0-500ppm
H2S: 0-200ppm
CO: 1ppm
H2S: 0.1ppm


Confined space entry and general safety compliance in:

Multi-gas leak detection in industries such as chemical, food and beverage, oil and gas (downstream)

*** Available to ship in first quarter of 2019