Acromag's thermoelectric metal tester alloy sorter saves valuable time, and helps prevent costly mistakes in mixed-up stock, parts, and heat-treat. It is a low-cost way to help sort expensive alloy scrap, verify precision machined parts in receiving inspection and check welds. The metal tester can also be used to detect the presence of insulated coatings on conductive materials.
This equipment can test each part in less than 5 seconds. The hot probe will reach the required operating temperature in less than five minutes. It is a non-destructive test that can be used on precision bearing surfaces. Readings can be made on any size or shape object. Best results are obtained when clean, uncorroded and unplated surface finishes are used. Readings taken from dirty or rusted scrap may differ from readings on clean metal, but with care, the Metal Tester can still supply usable results.
The Acromag Metal Tester uses a high precision solid-state transistor reference temperature controlled probe. Drift is avoided by using a special magnetic amplifier which provides extremely stable and reliable results.
Principles of Operation
The Acromag Metal Tester utilizes the same theory as a thermocouple, the Seebeck Effect. A thermocouple is formed by paired junctions of two different metals, and when one junction is at a higher temperature than the other, a small voltage is produced. The amount of voltage varies with type of metal and how it has been treated (e.g. rolling, drawing, annealing, etc.).
The tester creates a thermocouple junction on the specimen by means of copper electrodes. One electrode, the plate, is at room temperature. The other electrode, a probe, is heated to about 125°C. When the unknown metal specimen is placed on the copper plate and touched with the hot probe, a complete electric circuit with a small voltage is created. A magnetic amplifier drives a built-in voltmeter, which has several ranges for easier reading.
Key Features & Benefits
• Sorts alloy scrap
• Verifies parts in receiving Inspection for proper alloys
• Checks critical welds for location and material
• Detects presence of coatings on conductive alloys
• High-resolution meter with four ranges (±1mV or ±5mV full-scale)
• Stable readings
• Uses 115V AC, 60Hz wall outlet