Scratch-A-Track Motion Monitor

Model: HM-642
Price: $25.50

Scratch-A-Track Motion Monitor tracks thermal movement, structural settlement, load-induced deflections, and other changes in relative positioning. The monitor is compact, lightweight and weather-resistant, and designed to provide a clear, continuous graphic record of the total relative movement of adjacent surfaces.

The Scratch-A-Track Motion Monitor is mounted over a crack, joint, or another void, and anchored with user-supplied concrete screws. When mounted, the spring steel finger and thumb screw assembly allow pressure to be applied for scribing onto the HM-643 Scratch-A-Track Monitor Recording Pads (purchased separately) for use.


  • Small and weather-resistant
  • Easily mounted over cracks, joints, or other voids
  • Creates a permanent record when used with recording pads

Included Items:

  • Scratch-A-Track Motion Monitor


Related blogs:

Product Dimensions 1x5.5x1in (25x140x25mm), WxDxH
Estimated Shipping Weight 1.0lb (0.45kg)

Enter your name, email, and questions below and we will reply during business hours (8am - 5pm EST, Monday through Friday).

Product Dimensions 1x5.5x1in (25x140x25mm), WxDxH
Estimated Shipping Weight 1.0lb (0.45kg)
Customers who purchased this item also purchased
Crack Monitor Plus
Model: HM-634
Standard Crack Monitor
Model: HM-637
Crack Comparator Card
Model: HM-639
Corner Adapter
Model: HM-635
Displacement Monitor
Model: HM-638
Rapid-Set Epoxy
Model: HMA-804
Crack Width Gauge
Model: HM-636
Crack Monitoring Discs
Starting at $74.50
Models: HM-640, HM-641
Geotechnical Gauge
Model: HM-512
Dispersion Cup
Model: SA-16