Scanning hot metal detector with 2 sensitivity ranges and laser pointer.
The Rota-Sonde DC4000-L is a scanning hot metal detector for continuous caster and rolling mill applications, offering two sensitivity ranges and two self-monitoring functions.
The "high sensitivity" range enables detection of steel product at a temperature as low as 230 °C.
In this way, the Rota-Sonde DC4000-L is convenient for all hot metal detection applications in the Steel Industry and its self-monitoring facility optimises preventive maintenance.
Examples of applications
The Rota-Sonde DC4000-L is perfectly suitable for all detection applications of low-temperature rolled product or low emissivity materials such as hafnium.
It is also convenient for applications where a change in the process or material leads to major variations in the temperature of the product or its emissivity, as after quenching, or for special steels, etc...
If the apparent temperature of the material is uncertain during the design stage, the choice of the sensitivity range of the Rota-Sonde DC4000-L can be left to the time when it is commissioned.
The Rota-Sonde DC4000-L is a scanning sensor, which is sensitive to the infrared radiation emitted by hot products.
It is a self-contained detector including :
Because of its design and particularly its cast aluminium case, the Rota-Sonde DC4000-L is specially adapted for the harsh environment of the Steel Industry (shocks, vibrations, heat, vapour and dust).
• 1. Scanning system
The detection field is scanned by a rotating polygonal mirror which reflects the infrared radiation from the product to the photocell.
Because of the exclusive optical scanning principle, the Rota-Sonde DC4000-L offers the following advantages :
All these features give accurate and reliable detection, whatever the dimensions and the temperature of the product, or its distance and its position in the scanned field.
• 2. Photosensitive cell
The Rota-Sonde DC4000-L is fitted with a special photosensitive cell, the best compound for detection of metal, even at a temperature as low as 230 °C (455 °F).
The Rota-Sonde DC4000-L is enclosed in a sealed cast aluminium case.
A hood to protect the window glass is fitted with an air-jet facility to blow a vertical air curtain in front of this glass; the protective hood can be hinged down to clean the window.
The case is mounted on a cooling plate including a stainless steel pipe and fixed to a mounting stand, adjustable in two axes.
The water and air purging connections are on the support plate.
In this way it is possible to remove the sensor without first disconnecting the water and air supplies and without need of optical re-alignment.
Self monitoring functions
In order to optimise preventive maintenance and to improve reliability, the Rota-Sonde DC4000-L offers self monitoring functions including :