Rotary level Bosch GRL 300 HV Professional

The Bosch GRL 300 HV Professional Rotary Level is a measuring tool designed for horizontal and vertical levelling tasks on construction sites and survey works. It offers a maximum working range of 300 m and a levelling accuracy of ±0.1 mm/m. The instrument has a self-levelling range of ±5° (automatic levelling of up to 8%) and is built with IP54 protection for use in varied jobsite conditions. Power is supplied by a Nickel-Metal Hydride battery, and the unit’s compact dimensions (180 × 190 × 170 mm) support easy handling and transport.

Advantages

The rotary level provides automatic horizontal and vertical self-levelling which simplifies setup in both modes. Operation is streamlined with one button per function and a self-explanatory display, reducing the time needed for adjustments. A selectable shock warning function helps prevent levelling errors caused by impacts or vibrations. Durable construction with IP54 rating ensures protection from dust and splashes for reliable on-site performance.

Suitable for

• Setting reference heights and lines over distances up to 300 m
• Site levelling and grade checks in construction
• Interior and exterior layout work requiring precise horizontal or vertical alignment
• Survey tasks where compact, transportable rotary levels are required

Key specifications

• Brand: Bosch
• Model: GRL 300 HV Professional (MPN: 0 601 061 501)
• Maximum range: 300 m
• Levelling accuracy: ±0.1 mm/m
• Self-levelling range: ±5° (automatic up to 8%)
• Protection class: IP54
• Power source: Nickel-Metal Hydride battery
• Dimensions (W × D × H): 180 × 190 × 170 mm
• EAN: 3165140578714

How to use

Place the rotary level on a tripod or stable surface within the working area and switch it on. Use the one-button controls and the display to select horizontal or vertical levelling mode; the instrument will self-levell automatically within the ±5° range. Position the device so the rotating laser covers the target area and make any fine adjustments following the display prompts. If necessary, activate the shock warning function to receive alerts about impacts or vibrations that could affect accuracy.

Usage recommendations

For best results, mount the rotary level on a stable tripod, check battery charge before long jobs, and avoid operating the instrument outside the specified self-levelling angle. Use the shock warning if the working environment has frequent vibrations; otherwise, switch it off to prevent unnecessary alarms.