The HP models accurately measure the winding density of textile bobbins, beams, spools, spindles, cones, quills, dye packages, rolls, etc.

| Model Number |
Indenter Ball Size |
Typical Application |
|---|---|---|
| HP-2.5 | 2.5 mm | Closely wound synthetic, hard finish fibers and filaments. |
| HP-2.5F | 2.5 mm | Same as HP2.5, except with a flat base for large yarn packages over 15" (380 mm) in diameter. |
| HP-5 | 5.0 mm | Average yarns, threads, fibers, etc., wound with moderate winding density. |
| HP-5F | 5.0 mm | Same as HP5, except with a flat base for large yarn packages over 15" (380 mm) in diameter. |
| HP-10 | 10.0 mm | Loosely wound spools of natural or synthetic yarns and fibers, bulky yarns. |
| HP-10F | 10.0 mm | Same as HP10, except with a flat base for large yarn packages over 15" (380 MM) in diameter. |
| Indenter: | Cone 35°, 1.3 mm Ø |
| Depth of indentation: | 0 - 2.5 mm |
| Test pressure: | approx. 12.5 N |
| Measuring spring force: | 0.55 - 8.065 N |
| Display range: | 0 - 100 Scale |
| Scale diameter: | 56 mm |
| Weight, net (gross): | approx. 300 g (500 g) |
| Dimensions: | 50 x 50 x 110 mm (L x W x H) |