Can the GRL 350 HV be used for setting drainage slopes?

Yes, the GRL 350 HV features a manual slope function with a range of +/- 8%, allowing precise gradient setting for drainage, road camber, and pipeline trench work. The electronic servo motor maintains the set slope angle accurately during operation.

Is the Bosch GRL 350 HV suitable for use during monsoon season?

The GRL 350 HV carries an IP56 rating, meaning it is completely dust-proof and protected against strong water jets. This makes it suitable for use in rain and harsh conditions typical during Indian monsoon season on construction sites.

What accessories are available for the GRL 350 HV at Shri Narayan Machinery?

Shri Narayan Machinery LLP in Noida stocks the complete Bosch accessories range for the GRL 350 HV including the LR 1 laser receiver, LR 45 receiver, BT 150 professional tripod, BT 150 S stand, GR 500 grade rod, and carrying cases. Contact us for a quote on the full kit or individual accessories.

Bosch Professional

Bosch Rotation Lasers — GRL 350 HV Professional Rotary Laser Level

Name: Bosch Rotation Lasers — GRL 350 HV Professional Rotary Laser Level
Brand: Shri Narayan Machinery LLP

The Bosch GRL 350 HV Professional is a dual-axis rotation laser engineered for large-scale construction, grading, and site levelling applications where long-range accuracy is critical. With a working radius of up to 350 metres using the included LR 1 laser receiver, the GRL 350 HV covers entire building floors, parking lots, and open land parcels from a single setup. It projects both horizontal and vertical rotating laser planes, making it equally effective for floor levelling, grade work, and plumb alignment of structural columns and facades. The self-levelling mechanism with a servo-driven motor ensures rapid, reliable calibration on uneven terrain. An integrated manual slope function allows precise gradient setting for drainage and road work. Built with IP56 dust and water protection, the GRL 350 HV withstands monsoon-season construction conditions in India. Shri Narayan Machinery LLP supplies the Bosch GRL 350 HV with genuine Bosch receivers and tripods in Noida.

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Model: GRL 350 HV ProfessionalWorking Radius: Up to 350m (with LR 1 receiver)Horizontal Accuracy: +/- 0.1mm/mVertical Accuracy: +/- 0.1mm/m

Key Features

350-metre working radius with LR 1 laser receiver for large-site coverage

Dual-axis rotation: horizontal and vertical planes from a single unit

Self-levelling servo motor with +/- 8% grade manual slope function for drainage work

Accuracy of +/- 0.1mm/m (horizontal) for precise floor and grade levelling

Variable rotation speed (150/300/600 RPM) for different visibility and range needs

IP56 rated — fully dust-proof and protected against strong water jets

Electronic self-levelling with out-of-level auto-shutoff for reliable results

Compatible with Bosch LR 1 and LR 45 laser receivers, BT 150 tripod, and GR 500 grade rod

Technical Specifications

Model	GRL 350 HV Professional
Working Radius	Up to 350m (with LR 1 receiver)
Horizontal Accuracy	+/- 0.1mm/m
Vertical Accuracy	+/- 0.1mm/m
Self-Levelling Range	+/- 5 degrees
Manual Slope Range	+/- 8%
Rotation Speed	150 / 300 / 600 RPM (selectable)
Laser Class	Class 3R (< 5mW, 635nm red)
IP Rating	IP56
Power Source	Rechargeable NiMH battery pack
Operating Temperature	-20°C to +50°C
Weight	1.8 kg (without battery)

Applications

The Rotation Lasers is used across a wide range of industrial applications:

Floor levelling and screeding across large commercial buildings and warehouses
Site grading and earthwork levelling for foundations and parking lots
Road and pavement slope setting for proper drainage gradient
Structural column and facade plumb alignment on multi-storey construction
Suspended ceiling installation across expansive commercial and retail spaces
Agricultural land levelling for irrigation slope management
Pipeline trench grade control for drainage and sewer projects
Formwork alignment and level checking for RCC slab construction

Industries Served

Civil Construction & InfrastructureReal Estate DevelopmentRoad & Highway ConstructionAgriculture & Land DevelopmentIndustrial Plant ConstructionMunicipal & Government Works

Need Rotation Lasers? Get the Best Dealer Price

As your Bosch Professional dealer, Shri Narayan Machinery LLP offers competitive pricing on the entire Rotation Lasers range. Contact us for availability and your best quote.

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C-101, Sector 9, Noida, Uttar Pradesh 201301 | Bosch Professional Dealer

Frequently Asked Questions — Rotation Lasers

The Bosch GRL 350 HV has a working radius of 350 metres when used with the Bosch LR 1 laser receiver. This means it can cover a diameter of 700 metres from a single setup point — sufficient for most commercial building sites, parking lots, and road construction projects.

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