Model MD9207 High Speed Hot Product Detector Sensor General Description for Detection of Hot Metal or Hot Product in a Rod Mill, Bar Mall, Hot Strip Mill or other Industrial Applications

Model MD9207 High Speed Hot Product Detector Sensor
General Description

MD9207

Description

Technical Info

Housing
Info

Brochure

Request
More Info

Model MD9207 High Speed Hot Product Detector

Model MD9100 Hot Metal Detector Sensor
F4 Remote Lens - 4° FOV with Fiber Optic Lead Mounted in a PST-07 Air Purged Stainless Steel Lens Holder with a LSS-36 Universal Lift/Swivel Mounting Stand

General Description

The MD9207 Remote High Speed Hot Product Detector is an electronic optical sensor built to meet the higher speed detection requirements within the modern steel mill. Armored fiber optic leads allow the lens to be installed close to the process line in high ambient, while allowing the controller to be mounted in an accessible area. The MD9207 provides a 0.5 msec “pulsed” N.O, PNP transistor output and a “latched” N.O. PNP transistor output, initiated by the passing of a hot leading edge. In addition two independent latched reed relay outputs are also provided. The detector’s response time is virtually independent of the target temperature. In addition, background radiation is filtered out by processing the IR signal present in the field of view of the lens through both a slow and fast amplifier channel. A traditional threshold adjustment is not required.

A wide variety of remote lenses are available. Impervious to water or steam and built to withstand the harshest environments. Used in conjunction with flexible armored optic lead, these lenses provide a high level of optical accuracy by allowing the selection of the ideal lens arrangement for the installation. Robust lenses with temperature ratings of 180°C, 400°C can be mounted close to the hot product. All remote lenses incorporate filters to minimize sensitivity to extraneous light. For general tracking, spot lenses are commonly used. Where high accuracy is required or the product deviates about the center line (i.e. Rod Mill) a ½° x 25° precision slit rectangular lens should be utilized. This slit rectangular lens is also highly suited to Strip Mills. Various robust lens mounts are available including air purged, air purged & air cooled, and air purged & water cooled.

The MD9207 is provided with a remote self check feature that is remotely initiated. When activated the detector will switch and its performance checked.

Operation

To meet the requirements for higher speed detection within steel mills, the MD9207 was developed with two high speed transistor outputs, dual reed outputs and supplementary analog output.

The MD9207 is supplied with two types of outputs:
1. A 0.5 msec PNP pulse output initiated by the passing of the hot leading edge.

2. Two latched outputs, one PNP transistor and one reed relay. Both are initiated by the presence of hot product but remain latched while the hot product is in view.

The detector’s response time to an approaching hot edge is virtually independent of the target temperature. Background radiation is filtered out by processing the IR signal present through both a slow and fast channel. Fluorescent lighting affects both channels similarly and is therefore cancelled out. Faster changes in detected IR are only seen in the fast channel and hence triggers the output.

The detectors performance is determined by how much the target differs in the temperature to the background as well as the sharpness of rise (minimum required temperature change is 100°C). It is calibrated to IR values generally found in the mills. Greater temperature changes make little difference thus a traditional sensitivity control is not needed.

Background suppression adjustment is provided in that the detector may be adjusted to respond to sharper changes in IR level. This effectively allows higher levels of background IR to influence performance.