Pesola Special Model Spring Scale - Bettsometer with Test Needle 1000g

The Pesola Bettsometer is a precision force gauge designed for testing the tensile and tear strength of fabrics and lightweight materials. With a maximum capacity of 1000g, it provides a simple and repeatable method for assessing the resistance of materials such as balloon silk, kite fabric, parachute fabric and sailcloth.

The Bettsometer features a sharp test needle that penetrates the material under controlled force. A drag pointer records the maximum force reached when the material tears, allowing the result to be documented and compared across multiple test points. The instrument is supplied with two drag pointers, one for use and one as a replacement.

For safety, the pointed test needle must only be used by instructed professionals and must never be applied to living beings. When not in use, the supplied protective foam cover should be placed over the needle tip.

How to Use

1. Place the Bettsometer horizontally on a table, with the test needle extending freely over the edge and pointing downward. Ensure the needle tip does not touch any surface to prevent premature wear.
2. With the Bettsometer in the horizontal measuring position, adjust the zero point using the tare screw located on the top of the instrument.
3. Move the white drag pointer close to the zero position. A second drag pointer is supplied as a replacement.
4. Lay the fabric to be tested, such as balloon silk, kite fabric, parachute fabric or sailcloth, flat on a table.
5. Secure the fabric gently at the edge of the table using a wide clamp. For example, two wooden slats with screw clamps can be used to hold the fabric securely without damaging it.
6. Gently tension the fabric horizontally across the edge of the table. This can be done with one hand or with the assistance of a second person.
   Hold the Bettsometer near the base of the test needle and carefully push the needle vertically down through the slightly tensioned fabric. Do not touch the drag pointer.
7. Hold the Bettsometer by its handle and slowly pull it away from the table. Maintain a consistent pulling speed for each measurement. The needle tip should be positioned slightly diagonally in the direction of the pull.
8. Carefully observe the fabric at the point where the test needle penetrates it.
9. As soon as the fabric begins to tear or gives way audibly, immediately stop pulling and release the tension on the Bettsometer.
10. The drag pointer will remain at the maximum force reached when the fabric tears. Do not touch or move the drag pointer before recording the measured value.
11. Repeat the test at several different points on the fabric and record each measurement.
12. The lowest measured tear strength represents the weakest point of the material and can be used as an indication of whether the fabric requires replacement. The criteria for acceptable tear strength should be determined by the fabric manufacturer.
    

Specifications

• Brand: Pesola
• Product Code: 41000/13
• Capacity: 1000g
• Division: 10g
• Colour: Blue
• Precision: ± 0.3%
• Scale Length: 100mm
• Length Without Load: 225mm
• Maximum Length: 325mm
• Diameter: 12mm
• Components: All Non-Corroding
• Measuring Position: Horizontal
• Packaging: Transparent Case
• Warranty: 3 years
• Country of Origin: Switzerland