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  • Suitable for industrial applications
  • Simultaneous measurements of up to 9 gases
  • Up to 6 electrochemical sensor configurations
  • Emission calculations
  • Gas temperature measurement up to 2,012°F
  • Differential pressure measurement ±40 inH2O (100hPa)
  • Integrated gas cooler
  • Automatic condensate draining pump / PTFE filter
  • Air purging pump for CO-sensor protection
  • Built-in speed printer
  • Internal data storage for up to 8,500 measurements
  • RS232 / RS485 ports

The MRU Vario Plus Emission Monitoring System is suitable for industrial applications using combined infrared (NDIR) technology and electro-chemical sensors for maximum versatility. The Vario Plus complies with USEPA methods CTM-030 and CTM-034 and international ASTM D6522 Certified according to DIN EN 50379-1 and DIN EN 50379-2.

The Vario Plus simultaneous measurements of up to 9 gas components including O2, CO, NO, NO2, NOx, SO2, CO-high, CO-very high, H2S or H2, CH4 or C3H8. Up to 6 electrochemical sensor configurations are possible. An additional 3 gas NDIR bench with CO2, CO-high, CH4 (C3H8) is available.

Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.

MRU Instruments Gas Sample Probe Handle
9 or 16ft sample line, available as unheated or heated with 248°F regulated temperature
MRU Instruments Exchangeable Probe Tube
Exchangeable probe tube for the Vario Plus industrial probe handle, includes cone


Please consider these optional accessories.

MRU L-Type Pilot Tubes
L-Type Pilot Tube with or without temperature measurement
MRU 61447 CO / CO2 / CxHy Gas NDIR Bench
CO / CO2 / CxHy Gas NDIR Bench
MRU 59798 Stack Pressure Probe
Stack pressure (draft) probe, length 10", with 10' silicone hose
MRU 60073 Combustion Air Temperature Probe
Combustion air temperature probe, tube length 12"
MRU 59773 Shoulder Strap
Adjustable shoulder strap