# Spectra Precision LR30-MM Machine Display Receiver w/ NiMH Batteries & Charger
**Price: $1,835.00**
## Overview
The Spectra Precision LR30-MM integrates a ferrous-metal magnetic mounting base with the LR30 receiver platform, enabling rapid deployment and repositioning across multiple machines on active sites. Designed for grading, excavation, and utility installation professionals, this machine-mounted laser receiver delivers ±1.5mm accuracy across a 200mm detection range, eliminating the need for manual grade checking while operators maintain productivity from the cab.
The included NiMH battery system provides 60+ hours of continuous operation with convenient quick-charge capability, while the IP67-rated housing withstands water immersion, dust infiltration, and 2-meter drop impacts. The magnetic mount delivers 45 lbs of holding force on steel surfaces yet repositions in seconds without tools or fasteners, making it ideal for contractors running mixed equipment fleets where one receiver rotates across dozers, excavators, and motor graders throughout the day. Dual LCD displays show precise positioning relative to laser grade plane with clear visual and audible alerts, keeping operators informed without diverting attention from machine operation.
## Key Specifications
- Detection Range: 200mm diameter working window (100mm above/below grade)
- Accuracy: ±1.5mm in ideal conditions
- Display Type: Dual LCD panels with LED position indicators
- Magnetic Mount Strength: 45 lbs pull force on clean ferrous surfaces
- Power System: Rechargeable NiMH battery pack with AC/DC charger
- Battery Runtime: 60+ hours typical operation
- Charge Time: 5 hours to full capacity
- Environmental Rating: IP67 (dust-tight, water immersion to 1m)
- Drop Resistance: 2 meters onto concrete
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
- Alert System: Visual LED array plus audible beeper
- Dimensions: 240mm x 150mm x 95mm
- Weight: 1.8 kg with battery installed
- Warranty: 3 years manufacturer coverage
- LR30-MM Machine Display Receiver with integrated magnetic mount
- Rechargeable NiMH battery pack (pre-installed)
- AC/DC universal battery charger (110-240V)
- Vehicle power adapter cable (12V DC)
- Protective carry case with foam insert
- Quick-start guide and full operation manual
- Calibration certificate with serial documentation
- 3-year manufacturer warranty card
- Site Grading and Cut/Fill Operations: Position the LR30-MM on dozer blades or grader moldboards to maintain precise elevation control during mass earthwork, eliminating grade checker delays and reducing fuel consumption from over-cutting. The magnetic mount tolerates continuous vibration while the 200mm detection window accommodates rough grading tolerances before finish passes.
- Excavation Depth Control: Mount on excavator buckets or stick assemblies for accurate trench depth management during utility installation, foundation digging, or drainage work. Operators achieve specification depth on first pass without climbing out for manual measurements, particularly valuable in deep excavations where tape measures become impractical.
- Multi-Machine Rental Fleets: Contractors operating multiple machines benefit from the tool-free magnetic repositioning—move one LR30-MM from dozer to excavator to grader as job phases progress, rather than purchasing dedicated receivers for each piece of equipment. The rugged IP67 housing survives constant attachment/detachment cycles across diverse machinery.
- Laser-Guided Paving and Asphalt Work: Track screed elevation on asphalt pavers or concrete spreading equipment, ensuring uniform mat thickness and proper drainage slopes. The dual displays remain visible from operator stations while audible alerts cut through engine noise to signal grade deviations before material placement errors occur.
- Slope and Drainage Construction: Maintain precise cross-slopes and longitudinal grades on roads, parking lots, and sports fields where water management depends on sub-1% grade accuracy. The ±1.5mm precision supports tight specifications while the magnetic mount positions easily on blade edges for optimal laser signal reception.
- Agricultural Land Leveling: Achieve uniform field elevations for irrigation efficiency and drainage control in agricultural grading projects. The long battery life supports full-day operation across large acreage without mid-shift recharging, while the weatherproof construction handles dusty field conditions and equipment wash-down.
- LR30 Rod Clamp Mount - Convert to rod-mounted receiver for layout work
- RC402N Remote Control - Wireless grade adjustment from cab
- HL760 Rotating Laser Level - Dual-grade laser transmitter (sold separately)
- HR320 Handheld Receiver - Companion unit for grade checking and layout
- Replacement NiMH Battery Pack - Spare battery for extended shifts
- Universal Receiver Target Plate - Increase detection range in bright sunlight
- Adjustable Extension Arm - Position receiver away from machine body
- Hydraulic Valve Control Kits - Upgrade to automatic grade control systems
- Complete Guide to Mounting Laser Receivers on Construction Equipment
- Magnetic vs. Bracket Mounts: Choosing the Right Receiver Attachment
- Understanding Accuracy Specifications in Laser Grading Systems
- Battery Care and Runtime Optimization for Survey Instruments
- Will the magnetic mount stay attached during heavy vibration from compaction or rocky ground conditions?
- The LR30-MM's 45-pound pull-force magnet maintains secure contact on clean ferrous surfaces through typical construction vibration, including compaction rollers and excavators working in rock. Ensure mounting surfaces are free of thick paint, rust scale, or mud buildup that reduces magnetic contact area. For extreme vibration environments like jackhammers or pile drivers, supplemental safety straps are recommended, though standard grading and excavation operations rarely dislodge properly mounted units. The magnetic system has been field-tested on dozers operating in ripped hardpan and excavators breaking decomposed granite without detachment issues.
- How does battery life compare between the included NiMH system and standard alkaline batteries?
- The included rechargeable NiMH battery pack provides 60+ hours of continuous operation and can be recharged hundreds of times, significantly reducing operating costs compared to disposable alkaline cells. While some LR30 models accept AA alkaline batteries (approximately 30-40 hours per set), the NiMH system eliminates mid-project battery replacement and reduces environmental waste. The included AC/DC charger fully replenishes the NiMH pack in 5 hours, and the vehicle power adapter enables overnight charging from equipment batteries. For contractors running multi-shift operations, purchasing a spare NiMH pack enables continuous operation while one battery charges.
- Can this receiver work with rotating lasers from manufacturers other than Spectra Precision?
- Yes, the LR30-MM is compatible with any rotating laser transmitter operating on standard construction laser frequencies, including units from Topcon, Trimble, Leica, and other major manufacturers. The receiver detects the rotating laser plane regardless of brand and provides identical accuracy and functionality. This cross-compatibility makes the LR30-MM valuable for contractors working on projects where the general contractor or engineer provides the laser transmitter, or for rental companies serving clients with mixed equipment brands. Verify that your laser transmitter operates in standard rotating mode rather than proprietary digital protocols that require manufacturer-specific receivers.
- What's the difference between the LR30-MM and the standard LR30 receiver model?
- The LR30-MM integrates a permanent ferrous-metal magnetic mounting base, while the standard LR30 uses a rod clamp for elevation pole attachment. Both receivers share identical detection accuracy (±1.5mm), range (200mm window), and electronics, but serve different applications—the MM variant targets machine mounting for grading and excavation, while the standard model suits layout work, foundation forming, and applications requiring rod-mounted measurements. The magnetic mount cannot be removed from the MM version, so contractors needing both capabilities should consider purchasing the standard LR30 with optional magnetic mount accessory, or maintaining both models for specialized tasks. The MM version includes NiMH batteries standard, while the base LR30 typically ships with alkaline battery configuration.
