Rotary level Bosch GRL 300 HV Professional 300 m 0.1 mm/m

The Bosch GRL 300 HV Professional 300 m 0.1 mm/m is a rotary level designed for precise levelling tasks on construction sites and in surveying. It provides a maximum working range of up to 300 m and a levelling accuracy of ±0.1 mm/m. The instrument features automatic self-levelling within ±5° (approx. 8% slope) and runs on a 9 V NiMH battery with up to 30 hours of operation. Compact dimensions and a 5/8" tripod thread make it compatible with standard tripods and easy to integrate into existing measurement workflows.

Advantages

The device is simple to operate thanks to a dedicated one-button control for each function and a self-explanatory display. Automatic self-levelling in both horizontal and vertical modes simplifies setup and reduces alignment time. An adjustable shock warning function can be enabled or disabled to prevent levelling errors caused by vibrations or impacts. Long battery runtime and standard tripod threading improve usability on extended jobs.

Suitable for

• General construction site levelling
• Surveying and layout over distances up to 300 m
• Interior and exterior alignment in both horizontal and vertical planes
• Jobs requiring long battery runtime and quick setup

Key specifications

• Brand: Bosch
• Model: GRL 300 HV Professional
• Maximum range: 300 m
• Levelling accuracy: ±0.1 mm/m
• Self-levelling range: ±5° (approx. 8%)
• Power: 9 V NiMH battery, up to 30 h runtime
• Tripod thread: 5/8"
• MPN: 0.615.994.03Y
• EAN: 3165140604505

How to use

Mount the rotary level on a compatible tripod using the 5/8" thread and power it with the supplied 9 V NiMH battery. Switch on the instrument and use the one-button controls to select horizontal or vertical levelling mode; the unit will self-level automatically within the ±5° range. Monitor the display for status information and enable or disable the shock warning function according to site conditions. For measurements, rotate the head to project the laser around the site and check reference points or staff readings as required.

Usage recommendations

Use the shock warning function in environments with potential vibration or impacts to avoid incorrect levelling; disable it in stable conditions where continuous operation is preferred. For best accuracy, ensure the instrument is placed on a stable tripod and avoid operating beyond the specified self-levelling angle.