McON IR Sensors

Measures flow of high-temperature gases up to 2,500 °C

McON IR Sensors for Hot Gas Flow, Concentration, and Temperature Measurement

Used to measure the flow, concentration, and temperature of hot gases, McON IR sensors are infrared sensors based on a unique technology that highlights changes in IR radiation intensity in gases at high temperatures.
This unique technology enables continuous inline, non-contact measurement of flow rate, concentration (CO, CO2, H2O), and temperature up to 2,500 °C, even in dusty environments.
Sensors enable visualization of hot gas flow and plant improvement by applying this knowledge.

Highlights

Responsive—measures within 2 sec.
Non-contact IR measurement—no maintenance for parts in contact with gas
Average values within a duct can be determined from inline process gas measurement
Measures high-temperature gases up to 2,500 °C
Can be used even in high-dust environments by installing on one side of a duct, pipe, or furnace
Simultaneously measures flow, concentration (CO, CO2, H2O), and temperature with a single unit
Essentially drift-free—no calibration needed
No supporting equipment needed (no pretreatment of target gases required)

Specifications

Flow/Temperature Specifications

Two parallel sensors on one side of a duct allow continuous drift-free measurements of the velocity of off-gas velocity as hot as 2,500 °C.

Measurement range	3-100m/s
Accuracy	Within ±2 %
Reproducibility	Better than 99.95 %
Drift	None
Linearity	100％
Calibration	Not required
Target gas temp.	200–2,500 °C
Response time	1 sec.
Waterproof rating	IP66
Ambient temp.	Max50℃

Flow/Temp. Normally Below 1000 °C

Two parallel sensors on one side of a duct allow continuous drift-free measurements of off-gas velocity.

Measurement range	3–100 m/s
Accuracy	Within ±2 %
Reproducibility	Better than 99.95 %
Drift	None
Linearity	100%
Calibration	Not required
Target gas temp.	0–1,100 °C
Dust	10 mg–3,000 g/m3
Response time	1 sec.
Sensor diameter	25 mm (or 15 mm)
Sensor length	1,150 mm
Sensor material	Steel (1.4841)
Enclosure	Rittal AE 1030.500 (380 × 300 × 155 mm)

Concentration, Temperature

Two parallel sensors on one side of a duct allow continuous drift-free measurements of CO/CO2 concentrations and temperature and H2O concentrations in off-gas as hot as 2,500 °C.

Measurement range	3–100 m/s
Accuracy	Within ±2 %
Reproducibility	Better than 99.95 %
Drift	None
Linearity	100%
Calibration	Not required
Target gas temp.	200–2,500 °C
Response time	1 sec.
Waterproof rating	IP66
Ambient temp.	Max. 50 °C

Principle

Flow Rate

The high-speed IR photodetectors of the two sensors detect IR intensity at infrared wavelengths (spectra) emitted by gas-borne CO and CO2 molecules.
Changes in intensity are reflected in signal waveforms and compared to determine the time shift, allowing calculation of flow velocity based on the distance between the sensors.

Concentration, Temperature

Based on the information provided by these high-speed IR sensors, the system detects infrared wavelengths (spectra) emitted by CO, CO2, and H2O at high temperatures and measures changes in IR radiation intensity of specific gases found in the target gas as the concentrations change.
*Infrared excitation wavelength intensity of specific gases measured are directly converted into their concentration.
To reduce the effect of other gases during measurement, a filter is used to remove wavelengths other than IR wavelengths of specific gases in the target gas.

Applications

・Steelmaking: converters　　　：Visualization of hot gas flow at converter outlet for reuse (to conserve energy)
・Steelmaking: coke ovens　　　：Visualization of hot gas flow at converter outlet for reuse (to conserve energy)
・Steelmaking: electric furnace　：Measurement of electric furnace off-gas flow, concentration (CO, CO2, H2O), and temperature to optimize combustion
・Cement　　　　　　　　　　　：Visualization of hot gas flow at kiln outlet for reuse (to conserve energy)
・Incinerators　　　　　　　　　：Visualization of hot gas flow at incinerator outlet for reuse (to conserve energy)
・Lime　　　　　　　　　　　　：Visualization of hot gas flow at lime kiln outlet for reuse (to conserve energy)
・Boilers　　　　　　　　　　　：Visualization of hot gas flow at boiler outlet for reuse (to conserve energy)