The Bosch GRL18V-31NK Green-Beam Rotary Laser Kit provides high-accuracy horizontal leveling across outdoor commercial jobsites up to 1,000 ft. in diameter. Designed for site preparation, foundation leveling, concrete flatwork, and landscape grading, this system pairs high-visibility green-beam technology with a simplified single-button interface that reduces jobsite setup time.

The Class 2 green laser diode delivers clear visibility in ambient light, while the included LR20 receiver captures reference heights across bright exterior conditions with up to +/- 1/16 in. accuracy at 100 ft. An automatic self-leveling range of +/- 15% compensates for uneven terrain without manual leveling screws, and an integrated shock warning system alerts operators if the laser has been jarred out of calibration.

Built with an IP66-rated housing, the laser is sealed against jobsite dust and high-pressure water spray. The system offers dual power flexibility, running on the four included C alkaline batteries via the BA18-C adapter or on an optional Bosch 18V lithium-ion battery, eliminating downtime if primary batteries are exhausted.

Features & Benefits

• 1,000 ft. Working Range: Delivers exterior grading and leveling coverage with +/- 1/16 in. accuracy at 100 ft. when paired with the included LR20 receiver.
• High-Visibility Green Beam: 500-540 nm Class 2 laser diode provides high visual contrast compared to conventional red beams.
• Simplified One-Button Interface: Single on/off power switch streamlines operation and prevents field configuration errors.
• Electronic Self-Leveling: Automatically levels within a +/- 15% range to expedite tripod positioning on rough jobsite terrain.
• IP66 Jobsite Durability: Sealed construction guards optical and leveling mechanisms against heavy rain and airborne dust.
• Dual Power Versatility: Operates on four included C alkaline batteries using the BA18-C adapter or an optional Bosch 18V Lithium-Ion battery.
• Dual Threading Mounts: Fitted with 5/8-11 and 1/4 in. threading for attachment to standard tripods, batter boards, and wall mounts.
• Complete Field Outfit: Includes a heavy-duty aluminum tripod, leveling grade rod, laser receiver, and protective hard case.

What's Included

• (1) GRL18V-3-31G Horizontal Rotary Laser
• (1) LR20 Laser Receiver
• (1) BT170HD Heavy-Duty Tripod
• (1) GR8 8 ft. Grade Rod
• (1) BA18-C Alkaline Battery Adapter
• (4) C Alkaline Batteries
• (1) Hard Plastic Carrying Case

Shipping: Beaver Industrial Supply offers free shipping on orders over $199, with the exception of Sawstop and Laguna, which require additional fees to be collected. Other exceptions apply as noted on product pages.

We reserve the right to determine the fastest and most cost-effective manner of transportation for all orders that qualify for free shipping. Our shipping carriers cannot deliver to PO box or U.S. military post office box addresses, such as APO and FPO, so we require a physical street address for delivery. We use USPS, which typically takes 2-8 days for delivery, depending on your location, for smaller items and UPS Ground for all other ground shipments under 150 pounds.

• Returns: We accept returns and exchanges for a fee up to 30 days in unopened, new, and unused condition in the original packaging. Exceptions apply.

Please note, NO REFUNDS will be given on any new, used, or damaged item if it is not returned in the original packaging, no matter what condition the packaging is in. If the item qualifies for free shipping, you will be charged the original shipping cost and are responsible for shipping the product back with the shipping carrier of your choice.

We must receive the item undamaged. We recommend you package it accordingly and purchase insurance for higher-priced items to ensure you receive the full refund minus any incurred fees as applicable. We reserve the right to refuse the return of accessories.

Because items are your responsibility until they reach us, we recommend that you send the parcel using a delivery service that insures you of the value of the goods. Return shipping is at the customer's cost. At Beaver Industrial Supply’s discretion, delivery charges can be refunded if the goods are defective.

Returns require a return authorization number. Please call customer service at 314-773-5999 or submit a customer service inquiry to start the exchange or return process and receive an authorization number.

Machinery too large for parcel shipment (palletized or crated) is only returnable if there is a material defect that cannot be resolved by replacing components.