LG1093AA24 261A1812P012 LG1093火焰传感器

• Manufacturer : Honeywell
• Product No : LG1093AA24
• Product type : LG1093 Flame Sensor
• Mounting Interface : 3/4 inch internal NPT
• Control Panel Connection : Teflon shielded cable with one inch external conduit thread
• Operating Temperature : -40°F to +350°F
• Window Pressure Rating : 150 psig at 400°F
• Cable Lengths = AAx4 : 16ft (4.9m), AAx5 : 42ft (12.8m), AAx6 : 61ft. (18.6m)
• Shipping Weight : 3 Kg

As our flame scanners have evolved to an inherent part of our spare part portfolio, we continuously invest in research and development. Our flame scanners has been advanced to provide reliable information about flame intensity in the combustion chamber of gas turbines.
ITS flame scanner has been designed to detect the ultraviolet radiation emitted by a hydrocarbon flame.
The result of this measurement is converted to pulse outputs which correlates to the intensity of the ultraviolet radiation. Based on a programmable threshold setting, the control system is able to determine whether there is flame or not.

Application
ITS flame scanners are currently used on land based as well as on offshore industrial heavy duty gas turbines. They have been designed for safe operation of General Electric gas turbine frames 5, 6, 7 and 9.
Mode of Operation
When ultraviolet rays from an open flame hit the cathode leg of the sensor, the gas in the detector is ionized and photoelectrons are generated from the cathode.
The electrons and positive ions are accelerated towards the anode and cathode, creating more free electrons in the process. A burst of current flow is created by the avalanche effect. This burst of current will ‘discharge’ the detector by causing a drop in the potential difference across the anode and cathode. As a result, the avalanche effect is stopped, and the voltages at the anode and cathode start to build up again.
The cycle as described above will repeat as long as there is a presence of ultraviolet radiation. The frequency of the pulses (the number of generated pulses per second) depends on the intensity of the ultraviolet radiation.
Installation Instructions
The flame scanner is intended to be connected to a conduit system. A certified conduit stopping box (a type of protective flameproof enclosure „d“) shall be fitted immediately at the entrance of the enclosure.
The stopping box must be suitable for the ambient temperature range and should be installed correctly.
For external earthing or bonding connection the cable lug shall be used in such a manner that the conductor is secured against loosening and twisting and that contact pressure is permanently secured.
Functioning Life-Time
The unit is designed and manufactured for a life of not less than 2 (two) years or 16,000 (sixteen thousand) operating hours.