Ratio technology resistant to dust/ dirty windows. Electronic were 3mtrs away from induction coil to minimize the impact of EMC interferences. 200 degrees C ambient temperature without any cooling. M18 compact space saving installations. Dual output (4-20mA) for controller and display
Ratio Pyrometer for Vertical Billet Induction Heating Machine
Pilger mill in tube rolling mills - hot and cold pipe detection
- Induction Heating : Billet Re heating Process
- Ratio Technology – resistant against dust, steam and dirty glass window
- Wide temperature measurement range : 250 to 3000°C
- Sensing head with Ambient up to 315°C
- FO Cable with stainless steel sleeve, avoids EMC interferences in measurement
Challenges
- Error in measurement due to high dust, steam and dirty windows.
- High EMC interferences due to induction coils
- High ambient temperature at place of installation
- Space saving design required due to limited installation space
Solution
- Ratio technology resistant to dust/ dirty windows
- Electronic were 3mtrs away from induction coil to minimise the impact of EMC interreferences
- 200 degrees C ambient temperature without any cooling
- M18 compact space saving installations
- Dual output (4-20mA) for controller and display
Products and Accessories
Other Solutions for Molten Metal
Case Study Number
- TP3
Challenge
- The increasing flexibility of production lines requires a high adaptability of sensors. Continually changing object geometries, different temperatures and very high radiation or surrounding temperatures are no rarity.
- In a pilger mill those rough conditions can be found, among others in the production of seemless steel pipes. The raw steel blocks, each weighing a few tons are heated up first in a round oven at a temperature of 1300 °C.
- After descaling of the surface, the steel block is prepunched in a hole press with a strength from a converted 2000 t. In the next sloping rolling mill the growing pipe rotates between two rollers that are positioned at an angle to each other. The punching is widened to the size of the mandrel diameter.
Previous solution / Competitor product
- N/A
Solution
- The sensor that was installed at this application is the HMD OKA 2038.38 G with tube OL 19.
- The signal of the infrared sensors controls the movement of centering device and abutment. The point of view is restricted by the tube and prevents disturbances by steam in the cooling phase.
- An optimum adaptation to the operating conditions is given due to the adjustable response temperature. The HMD with self-learning response temperature (Auto-Teach function) is suited to continually changing conditions.
- The compact sensor with a stainless steel housing can withstand surrounding temperatures of up to 75° C. The use of a cooling jacket raises this up to 200° C.
- Alternatively sensors with fibre optic cables are available which permit an application at ambient temperatures up to 600° C without cooling.
Customer Benefits
- Maintenance-free
- High temperature stability
- Recognition of hot objects at big distances
- Self adjustment with Auto-Teach or step switch for the response temperature
Product Part number
- OKA 2038.38 G
Brand
- Proxitron
Accessories
- Piros swivel stand HM2
- Tube OL 19
- Pilot light unit (for alignment) DAK 308 + OL 26
- Different cable lengths (e.g. 15 m)
Customer Testimonial
compared to previous solution or competition
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