MPA mPower Electronics VOXI LEL MP820 Combustible Gas Transmitters


The VOXI LEL MP820 is a point-type combustible gas transmitter designed modularly with smart sensor technology and an integral flameproof enclosure for fixed applications. The versatile platform offers cata-lytic combustible-gas sensors with auto-zeroing and offline calibration. Three-wire 4-20 mA analog and RS485 digital signal outputs are standard, while wireless output is optional. Various applications include oil & gas, petrochemical, chemical, metallurgical, pharmaceutical, semiconductor, environmental moni-toring, and other industry facilities.


Features, Functions and Benefits
•Supporting catalytic combustion (LEL) sensor modules with sensor identification and manufacturing data
•Sensor diagnosis, temperature compensation and auto-zeroing
•LCD with backlight color varying according to alarm status
•Calibration due date
•3 wires for 4-20 mA and RS485 ModBus output
•Infrared remote programmer for settings, calibrations and adjustments
•Error codes for easy troubleshooting
•Recoverable factory settings
•IP67 rating
•IECEx certification
•Optional ISM 915MHz modem for wireless connectivity at no subscription fee (check availability)


VOXI LEL Specifications
Detector Specifications


Size
8.9 x 5.9 x 4.9 in (226 x 150 x 125 mm) Weight
5.7 lbs. (2.6 kg) Sensors
Catalytic combustion (LEL) sensor modules Calibration
Two-point calibration (zero & span) Response Time
15s t90 Temperature
-40° to +158°F (-40° to +70°C) Humidity
10% to 95% Relative Humidity (non-condensing) Pressure
86 to 106 kPa (0.85 to 1.05 atm) Power
<5W; 10-30 VDC supply Sampling
Diffusion Display
4-digit segmented LCD Configuration
Via remote infrared programmer Outputs
Analog: 4-20 mA (3 wires)
Digital: RS-485,
ModBus
3 Relays
Wireless ISM 915MHz (optional) 1 mile line of sight


Alarms
LCD & LED flashing, relays for external alarm devices Housing
Explosion-proof aluminum alloy Housing Entries
4 Conduit entries ¾” NPT
1 Port M28x1 fitting Installation
Pipe bolt or wall mount IP Rating
IP-67 EMI/RFI
Compliant with EMC Directive 2014/30/EU


Safety Certifications
IECEx Ex db IIC T6 Gb (non-Wireless)
Ex tb IIIC T80°C Db (non-Wireless)
Ex db ia IIC T6 Gb (Wireless)
Ex ia tb IIIC T80oC Db (Wireless)
CNEX Ex d IIC T6


Installation Pipe holding, wall mount 
Warranty 2 Years


Standard
•Gas Transmitter with Sensor installed
•Rain Shield & Calibration Cap
•Infrared Remote Programmer
•Quick Start Guide
•Calibration Certificate


Optional
•ISM 915 MHz Modem with Antenna
•Mounting Bracket


Sensor Options


Sensor Range Resolution 


LEL (Combustibles)
0-100%LEL
1%LEL LEL-F (Combustibles with Filters)
0-100%LEL
1%LEL 
Factory Calibration Gas
Methane, Propane, Butane or Hydrogen


Standard
•Gas Transmitter with Sensor installed
•Rain Shield & Calibration Cap
•Infrared Remote Programmer
•Quick Start Guide
•Calibration Certificate


Optional
•ISM 915 MHz Modem with Antenna
•Mounting Bracket