This product family has been phased out!

Process solutions

Your Benefits

  • Online monitoring of values relevant to corrosion for the minimization of corrosive wearing off
  • Effects of adjustment of the burners and combustion air can be followed online
  • Lowering of operational costs and potentially improved safety through early warning of potential dangers caused by corrosive erosion of the boiler wall
  • Efficient location of possible problem areas of the boiler wall
  • Use of data for creation of effective maintenance and revision plans
  • Installation and commissioning possible while boiler running


The GM960 boiler wall monitor is a trend measuring system for the analysis of CO and O2 at the inner boiler wall of a steam generator powered by hard coal. The CO corrosion level as well as the CO corrosion load are determined at each of up to 40 measuring points.

The CO and O2 values and the CO corrosion levels are aimed at detecting potential danger of corrosion so that immediate action can be taken against the corrosive erosion of the boiler wall. The value of the CO corrosion load represents the long term CO corrosion exposure acting on the boiler wall.

At a glance
  • Up to 40 boiler wall probes, each with one CO and O2 sensor for installation directly in the boiler wall
  • Up to 40 connection units for pressurized air, power supply and data bus
  • One master unit with fieldbus interface (Modbus) to the process control
  • Software MEPA-GM960 for graphical visualization of readings, for process control, storage of data and communication



Technical overview


Please note: The exact device specifications and performance data of the product may deviate from the information provided here, and depend on the application in which the product is being used and the relevant customer specifications.

  • System


    Measured valuesCO, O2, CO corrosion level, CO corrosion load
    Measurement principlesZirconium dioxide sensor
    Gas flow rate
    ≤ 30 l/h
    Per measuring point
    Measuring ranges
    CO0 ... 1 Vol.-%
    O21 ... 10 Vol.-%
    Calculated values: CO corrosion level and CO corrosion load
    Max. 40 measuring points in the flue gas of hard coal fired combustion plants (others on request)
    Process pressure
    –50 hPa ... 100 hPa
    Ambient temperature
    –10 °C ... +50 °C
    Storage temperature
    –20 °C ... +50 °C
    Ambient humidity
    ≤ 80 %
    Electrical safetyCE
    Enclosure rating
    Connection unitIP54
    Communication interface



    Type of fieldbus integrationASCII RS-485
    FunctionProprietary service interface
    Master unitLED flat screen
    Dimensions (W x H x D)
    Boiler wall probe160 mm x 190.5 mm x 200 mm (for details see dimensional drawings)
    Connection unit300 mm x 320 mm x 220 mm (for details see dimensional drawings)
    Connection unit10.5 kg
    Boiler wall probe5.5 kg
    Power supply
    Voltage115 V / 230 V
    Frequency50 Hz / 60 Hz
    Power consumption≤ 120 W
    Per connection unit
    Compressed air (each measuring point)≤ 0.4 m³/h
    Instrument air: 2.5 ... 6 bar; particle size max. 40 µm; particle content max. 10 mg/m³; oil content max. 5 mg/m³; water content max. 8 g/m³ (at 3 °C)
All technical data can be found accompanying the individual product