Optical Temperature Measurement (OTM)
The Optical Temperature Measurement (OTM) sensor is a rugged, stand alone, non-contact thermometer designed for measuring the temperature of hot gases. The OTM is applicable to industrial applications in the range of 800°C-3000°C.
Overview
The OTM system provides continuous measurement of temperature that is highly accurate and with repeatability. Signal outputs are a standard 4-20mA. Standard features also include an automated alarm for low power signal. The Optical Temperature Measurement system (OTM) uses Infrared emission emitted by hot gases in the temperature range of 800°C-3000°C that may or may not contain dust to passively measure temperature without any contact with the gases. The optical sensor in OTM converts the light signal to electrical signals, which are sent to an OTM cabinet.
Technical Data
The OTM cabinet requires 110V or 220V power supply. The temperature measurement and signal are used on a simple 4 to 20mA current loop. Refer to the system electrical drawing.
The sensor contains a sighting tube which has a lens and collects infrared radiation from a predefined target area. This radiation is transported onto an optical module with two detectors. The detector converts the incoming infrared radiation into a low-level electrical voltage which is proportional to the temperature of the target. The electrical voltages are then amplified, corrected, and fed to the equation to produce the temperature. This value is then linearized to produce an analog 4-20mA current output. There is an additional 4-20mA output provided which displays fault alarms and is to be used only for trouble shooting purposes by a qualified technician.
In normal operation the 4-20mA output is designed to stay within the ‘optimum range’. All the faults are displayed by 4mA in the signal output.
Innovation
The OTM system is a rugged, optical, stand alone, non-contact thermometer designed for measuring the temperature of hot gases. It can be used for any kind of hot gases and is not dependent on the presence of CO2. Therefore, it can be applied to a variety of applications including dusty environments.
Automation & Digital
Temperature data is crucial for the smooth operation of the plant and automation is able to optimize the process. The data is processed by iEAF® for intelligent and reliable plant operation and sent to the Tenova NextGen® System for real-time precise process, operations monitoring and optimization.
Environment
- Off-gas temperature can be used for energy losses calculation, hence saving energy consumption.
- Fume system control (i.e., Quencher water flow or primary/secondary FS Damper control, Scrubber….)
- Better environmental control
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