MPA mPower Electronics MUNI MP420 Compact & Lightweight 4-Gas Monitors

The MUNI MP420 is a compact and lightweight 4-gas detector for worker safety at hazardous locations, with four
standard sensors for oxygen (O2), combustibles (LEL), carbon monoxide (CO) and hydrogen sulfide (H2S). Alternative
sensors are low power infrared methane (CH4), sulfur dioxide (SO2), and hydrogen cyanide (HCN). The detector
is packaged in a robust housing with no moving parts. Its battery power offers 2 work shifts of run time for a
standard 4-gas detector, and extended run time using a low-power infrared sensor. The simple, 2-button operation
results in ultimate ease of use and significantly reduced time spent training the user.


Features, Functions and Benefits
• Compact, robust, lightweight & wearable
• Auto backlit LCD with large numeric digits
• Easy-to-navigate menu with two buttons
• Up to 4 replaceable sensors out of 7 choices; non-interchangeability reduces
monitor cost
• Battery operation 24 hours with pellistor LEL sensor; extended time with lowpower
infrared LEL sensor
• Tri-color status indicators on regular self-diagnosis of sensor, battery & circuit
• Wide angle LED alarms
• 1000 Events log
• Combination charge adapter / micro-USB PC interface cable
• IP-68 weather ingress rating
• Optional BLE wireless connectivity
• Optional MuniDock or CaliCase for convenient bump & calibration
Compact & Lightweight 4-Gas Monitors


Detector Specifications
Size
4.33 x 2.36 x 1.18 in
(110 x 60 x 30 mm) Weight
8.0 oz (230 g) Sensors
• Stardard: LEL (Pellistor), O2 LF‡, CO & H2S
• Alternatives: CH4 (NDIR‡), SO2 and HCN
• Replaceable but not interchangeable Battery
Rechargeable Li-ion pack: up to 18 hours with Pellistor; extended run time with NDIR Direct Readout
• Real-time reading of gas concentration
• Visual compliance indicator
• Battery status
• STEL, TWA, peak and minimum values Display
Segment LCD, 1.75 x 1.25 in (44 x 32 mm) with LED backlight for enhanced readability Keypad
2 Operation keys Calibration & Bump Test
Manual with calibration cup. MuniDock single-bay (MP420T) or CaliCase 4-bay (MP342) options allow automated bump test and cali-bration and printing certificates


Alarms
• Audible (95 dB @ 30 cm)
• Visual (tri-color LEDs)
• Vibration Datalogging
1000 Events(alarms, function tests and calibrations) 
Charging and Communica-tion
• Charging with AC adapter or cable to PC
• PC comm for data download, monitor setup & firmware upgrades via cable, optional BLE (Bluetooth Low Energy), or MuniDock 
Temperature -4° to 122°F (-20° to 50°C)


Humidity 0% to 95% Relative humidity (non-condensing)
IP Rating IP-68


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


EMC/RFI
EMC directive: 2014/30/EU Warranty
2 Years including sensors 3 Years with CH4(NDIR)/O2(Lead-free)/H2S/CO


Standard
• MP420 detector including rechargeable Li+ battery, selected sensors and alligator clip
• AC Charging adapter
• Calibration cap
• USB Communication cable
• Quick start guide
• Calibration certificate
Optional
• External filters
• BLE Wireless
• MuniDock MP420T bump & calibration station


Sensor Information
Sensor* Resolution& Range  Response Time (t90)
1. Combustibles (Pellistor) or (NDIR)†
1 - 100% LEL
1 - 100% LEL CH4
15 sec
30 sec 2. Oxygen (O2) (Galvanic) or (Lead-free)ǂ
0.1 - 30.0% Vol
0.1 - 30.0% Vol
15 sec
15 sec 3. Hydrogen Sulfide (H2S) or
0.1 - 100 ppm
15 sec Hydrogen Cyanide (HCN)
0.1 - 50.0 ppm
120 sec 4. Carbon Monoxide (CO) or
1 - 1000 ppm
15 sec Sulfur Dioxide (SO2)
0.1 - 20.0 ppm
30 sec