The Probe Tack makes it easy to measure the tack of pressure sensitive adhesives. A precision ground 5.0 mm diameter flat probe contacts the adhesive, reverses direction and pulls away from the adhesive. The maximum force required to break the adhesive bond is recorded and displayed. The Probe Tack adhesive testing machine meets the standards specified in ASTM D2979. Machine speed is 24 ipm (10 mm/sec), probe diameter is 5 mm, and a ring weight that applies a force of 9.79 +/-0.10 kPa. An automatic test cycle generates a dwell time of 1 second from the beginning of contact to the end of contact.