Proceq Schmidt OS‑120

Pendulum Rebound Hammer for Low‑Strength Materials

The Proceq Schmidt OS‑120 is a precision-engineered mechanical rebound hammer optimized for testing soft or early-strength materials like lightweight concrete, gypsum boards, fresh concrete, and brickwork mortar. Offering high-resolution analog readings and calibrated for compressive strengths as low as 1 N/mm², it delivers reliable non-destructive strength estimation where standard rebound hammers fall short.

Features

Designed specifically for low-strength materials (1–5 N/mm²)
Impact energy of ~0.833 Nm for gentle testing
High‑resolution, half‑circular mechanical scale
No power or batteries required—purely mechanical operation
Lightweight and ergonomic handheld design
Durable Swiss construction for field or lab use
Two model variants (fresh concrete/mortar) for tailored testing

Applications

Early-age strength estimation of fresh concrete
Quality control of mortar joints in brickwork
Testing lightweight or aerated concrete
Evaluation of gypsum board hardness
Strength mapping in low-density materials

Technical Data

Parameter	Specification
Impact Energy	~0.833 Nm
Compressive Strength Range	1 to 5 N/mm² (145 to 725 psi)
Display	Mechanical half‑circular analog
Model Variants	OS‑120 (concrete), OS‑120PT (mortar/light material)
Hammer Mass	~720 g
Housing Dimensions	~230 × 60 × 200 mm
Operating Temperature	−10 °C to +50 °C
Power Requirement	None (manual operation)
Calibration	Optional portable anvil per EN12504‑2
Standards Compliance	EN 12504‑2, EN 13791, ASTM, ISO, JIS

Tags: fresh concrete strength, gypsum board testing, lightweight material testing, low‑strength concrete testing, mechanical rebound hammer, mortar hardness, non‑destructive strength estimation, pendulum rebound hammer, Proceq Schmidt OS‑120

Tags:

Proceq Schmidt OS‑120, pendulum rebound hammer, low‑strength concrete testing, fresh concrete strength, mortar hardness, gypsum board testing, non‑destructive strength estimation, mechanical rebound hammer, lightweight material testing