Date:2025-6-26 Hits:50
MA mPower Electronics VOXI EC MP840 Toxic Gas Transmitters

The VOXI EC MP840 is a point-type toxic gas transmitter designed with smart sensor technology and an integral flameproof enclosure for fixed applications. The versatile platform offers over 10 chemical sensor options, 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 monitoring, and other industry facilities.
Features, Functions and Benefits
•Supporting >10 smart modules with sensor identification and manufacturing data
•Sensor diagnosis, temperature compensation and auto-zeroing
•LCD with backlight color varying with alarm condition
•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 EC 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 Electrochemical sensor modules
Calibration Two-point calibration (zero & span)
Response Time 30 to 120s (t90 varies with sensor type)
Temperature -40° to +131°F (-40° to +55°C)
-40° to +158°F (-40° to +70°C) intermittent
Humidity 10% to 95% Relative Humidity (non-condensing)
Pressure 86 to 106 kPa (0.85 to 1.05 atm)
Power <1W; 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,
external strobe and horn (optional)
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 ia IIC T6 Gb
Ex ia tb IIIC T80°C Db
CNEX Ex d IIC T6
Installation Pipe holding, wall mount
Warranty 2 Years on CO & H2S sensors, 1 year on others
Standard
• Gas Transmitter with Sensor installed
• Rain Shield & Calibration Cap
• Infrared Remote Programmer
• Quick Start Guide
• Calibration Certificate
Optional
• Mounting Bracket
• Strobe and Horn with 3/4" NPT Fitting
Sensor Options
Sensor Range Resolution
O2 (Oxygen) Lead-Free 0-30%Vol 0.1%Vol
CO (Carbon Monoxide) 0-1000 ppm 1 ppm
0-2000 ppm 1 ppm
H2S (Hydrogen Sulfide) 0-200 ppm 0.1 ppm
0-1000 ppm 1 ppm
SO2 (Sulfur Dioxide) 0-20 ppm 0.1 ppm
ClO2 (Chlorine Dioxide) 0-1 ppm 0.01 ppm
H2 (Hydrogen) 0-1000 ppm 1 ppm
HF (Hydrogen Fluoride) 0-20 ppm 0.1 ppm
HCN (Hydrogen Cyanide) 0-100 ppm 0.1 ppm
NH3 (Ammonia)
0-100 ppm 1 ppm
0-1000 ppm 1 ppm

The VOXI EC MP840 is a point-type toxic gas transmitter designed with smart sensor technology and an integral flameproof enclosure for fixed applications. The versatile platform offers over 10 chemical sensor options, 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 monitoring, and other industry facilities.
Features, Functions and Benefits
•Supporting >10 smart modules with sensor identification and manufacturing data
•Sensor diagnosis, temperature compensation and auto-zeroing
•LCD with backlight color varying with alarm condition
•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 EC 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 Electrochemical sensor modules
Calibration Two-point calibration (zero & span)
Response Time 30 to 120s (t90 varies with sensor type)
Temperature -40° to +131°F (-40° to +55°C)
-40° to +158°F (-40° to +70°C) intermittent
Humidity 10% to 95% Relative Humidity (non-condensing)
Pressure 86 to 106 kPa (0.85 to 1.05 atm)
Power <1W; 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,
external strobe and horn (optional)
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 ia IIC T6 Gb
Ex ia tb IIIC T80°C Db
CNEX Ex d IIC T6
Installation Pipe holding, wall mount
Warranty 2 Years on CO & H2S sensors, 1 year on others
Standard
• Gas Transmitter with Sensor installed
• Rain Shield & Calibration Cap
• Infrared Remote Programmer
• Quick Start Guide
• Calibration Certificate
Optional
• Mounting Bracket
• Strobe and Horn with 3/4" NPT Fitting
Sensor Options
Sensor Range Resolution
O2 (Oxygen) Lead-Free 0-30%Vol 0.1%Vol
CO (Carbon Monoxide) 0-1000 ppm 1 ppm
0-2000 ppm 1 ppm
H2S (Hydrogen Sulfide) 0-200 ppm 0.1 ppm
0-1000 ppm 1 ppm
SO2 (Sulfur Dioxide) 0-20 ppm 0.1 ppm
ClO2 (Chlorine Dioxide) 0-1 ppm 0.01 ppm
H2 (Hydrogen) 0-1000 ppm 1 ppm
HF (Hydrogen Fluoride) 0-20 ppm 0.1 ppm
HCN (Hydrogen Cyanide) 0-100 ppm 0.1 ppm
NH3 (Ammonia)
0-100 ppm 1 ppm
0-1000 ppm 1 ppm