These center hole load cells measure ground anchor and PC anchor loads, and also measure loads applied during tunnel arch support work. Rated Capacity: 5 kN to 500 kN Diameter: 98 mm (5 kN to 50 kN) to 115 mm (500 kN) Nonlinearity: Within ±1% RO (5 kN to 100 kN), within ±2% RO (200 kN), within ±0.6% RO (500 kN)