• Green Enviro International Pvt Ltd
ISO 9001 : 2015     ISO 14001 : 2015     ISO 45001 : 2018    
Confined Space Entry Monitors

The POLI multi-gas meters offer 4 or 5 gas monitoring of toxic gases, Oxygen (O2), Combustibles (LEL), Carbon Dioxide (CO2) 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 applications, including Confined Space Entry, while the POLI MP400 is a basic, 4 gas diffusion detector for worker safety at hazardous locations. Smart sensors carry calibration and ID information with them for quick exchange in the field during Hazmat response.

Specific sensors include electrochemical (EC) for Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Ammonia (NH3), Hydrogen Cya- nide (HCN), Hydrogen Chloride (HCl), Hydrogen Fluoride (HF), Chlorine (Cl2), Chlorine Dioxide (ClO2), Nitric Oxide

(NO), Nitrogen Dioxide (NO2), Sulfur Dioxide (SO2), Ethylene Oxide, Methyl Mercaptan, and others. Also available are pellistor for LEL level combustibles, non-dispersive infrared (NDIR) for Vol% level CO2 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 measurements in a single instrument. The MP400P has rugged construction and easy-to-learn 2-button oper- ation. The unique Man-Down alarm feature notifies team workers wirelessly if a user becomes incapacitated.

Features, Functions and Benefits


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 Over 30 interchangeable and field-replaceable sen- sors including PID for VOCs, EC for Toxic and O2, Pellistor for LEL, and NDIR for LEL, Vol% & CO2
Response Time (t90) • 15 seconds (LEL/CO/H2S/O2) • Others vary – see sensor specification sheet
Battery Rechargeable Li-ion pack: 16 hours in diffusion mode, 12 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 or diffusion
Calibration Manual calibration. CaliCase option allows auto- matic bump test and calibration on up to 4 units simultaneously
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 Communica- tion Charging, data download, instrument setup and firmware upgrades on PC or laptop via PC comm, cradle, travel charger, or CaliCase.
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

Sensor Range Resolution
PID 0-200 ppm 0-2000 ppm 0.01 ppm 0.1 ppm
Oxygen (O2) Lead Wool Lead-Free 0-30%Vol 0-30%Vol 0.1%Vol 0.1%Vol
Combustibles (LEL%) 0-100%LEL 1%LEL
Hydrocarbons (Vol%) 0-100%Vol 0.1%Vol
Dual-Range LEL%/Vol% 0-100%Vol 1%LEL
CO2 (Carbon Dioxide) 0-50000 ppm 100 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
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
C2H4O (Acetaldehyde) 0-20 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