The range of this tension gauge can be measured from 10mN(1gf)-5,000mN(500gf).
So, it is possible to measure a high range of tension. (mN or gf selected by switch.)
Too fast of a thread pull will cause the tension reading to go up to fast. Pull slowly. .

It is possible to only replace the TM501 attachment with TM502 attachment included, and to measure both a standard L and large type M bobbin cases.

  • Compact design with easy-to-read LED display
  • Provides 12-times the measuring range of analog Towa units
  • Interchangeable inserts allow body to be used for Standard (L-Type) and Large (M-Type) bobbin cases
  • Measures tension of both bobbin case thread and upper thread with one compact unit
  • Battery operated (3 AAA batteries, not included)
  • US Warranty 1 year limited warranty on defects in materials and workmanship.
  • Non-US Warranty: 30 days parts and labor
Other Images

icon Not only under thread, but also upper thread

icon Towa DTM-A1 L & M Bobbin Case Digital Thread Tension Gauge, 0-500g Pull

icon Only Difference in DTM-A1 and DTM-A2 Bobbin Case Holders is the TM501 and TM502 attachment brackets shown.

Stuart D, Newmarket AU
You have a very good web site that is easy to navigate. All of my email questions before and during the purchase were promptly and clearly answered. The Towa Gauge was shipped very quickly and I could track the package. My only disappointment was with the Handi Quilter tension kit which was unable to be supplied. Not sure why it could not be supplied, since I have just purchased it directly from Handi Quilter and they have 10 in stock. Thanks for the opportunity to provide feedback.

Evelyn W, Plant City FL
AllBrands is a good company to do business with.