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Spectra LR20-1 Detector Kit

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Orders placed now will typically be delivered free by DPD on Wednesday 27th (England, Wales, Scottish Lowlands) & Thursday 28th (Highlands, Northern Ireland & Republic of Ireland).


Heavy Duty Machine Laser Detector with Magnetic Mount

Model: LR20-1

SKU: LR20-1

Was: £995.00 Including VAT.

Sale Price: £975.99 Incl. VAT: £1,171.19

Availability: In Stock In Stock
Order by 3:30pm for Next Working Day Delivery (T&C Apply) *Order by 3:45pm for Next Working Day Delivery.

Current Warehouse Stock: Only 1 left - order soon!


Product overview:

Rugged 360° Magnetic Machine Laser Detector for all RED beam rotary laser levels.


The Spectra Precision® LR20 laser detector allows compact machines to achieve tighter tolerances without the need for a grade checker. Now smaller machines can be more productive while improving accuracy and saving material usage costs.

Designed specifically for the cost-conscious site preparation contractor, these detectors offer a very attractive return on investment by improving the productivity and material usage costs of compact machines. From simple depth and slope display to elevation control, you can broaden the scope of job applications and very easily move the laser detectors across their fleet of compact machines.

These rugged units can be easily moved from machine to machine with features and setup options for multiple applications and specifications. The 360° laser reception height ensures maximum laser control across the site.

The LR20 Laser Magnetic Machine detector is as a standalone display receiver for mini excavators and compact machines. It is powered by NiMH batteries or direct machine power.



The Spectra LR20 Magnetic Machine Detector is designed for outdoor machine grading and depth control. This standalone laser detector is ideal for use on mini-excavators and compact machines. The LR20 also features a 360-degree reception and works with any model of visible red beam, rotating laser.


LEDs and Plumb Indication:

This magnetic machine detector features super bright LEDs with green on-grade display providing superior depth/elevation indication. It has a built-in plumb indicator (+/-2.5 degrees from plumb) for fast, accurate grade checking in mini-excavator applications.



For easy access to the most common functions, the LR20 features a touch panel that provides low-battery warning, sensitivity band selection and display-brightness buttons.


Multiple Accuracies:

The LR20 offers three sensitivity settings: fine, standard and wide. This allows construction professionals to work with maximum flexibility to meet jobsite requirements, from rough grading to final finishing. Centre and offset on-grades are ideal for both grading and excavating applications.


Mounting Facility:

The LR20’s large front-facing knob allow for quick and hassle-free installation to a round pipe or square tubing. (A type MMM magnetic mount is also included.)


Rugged and Water Resistant:

Constructed of durable polycarbonate, this magnetic machine detector can withstand harsh weather and construction site conditions. Using the included rechargeable NiMH batteries, it works up to 35 hours or it will accept 5 x type AA alkaline batteries.


Magnetic Mount (type MMM)

A very powerful magnetic mount is included in the kit, giving unparalleled fixing support for the LR20 detector.


This Spectra Precision LR20-1 kit comes with a hard carry case, rechargeable batteries, charger and 2-year manufacturer's warranty.  


Product video:

Please note: The Spectra Precision promotional video may demonstrate the LR20 detector in conjunction with optional accessories that are not included as standard. Please check the "Kit comprises of" section to ensure the accessories you require are included.

Technical specification:

The Spectra LR20-1 Detector Kit will operate with any RED beam rotary lasers levels. It will not work with GREEN beam lasers. There are currently no magnetic machine detectors for green beam lasers.

User guides & Datasheets:

Manufacturers data:

Please click HERE to visit the manufactures data page.


Product Comparison:

Please note: Some features listed are only available using optional accessories.

Calibration and servicing:

We check and calibrate all Lasers prior to dispatch, to ensure they meet or exceed the manufacturers published specifications at the time of shipment from the factory.
If you routinely work on large job sites, which require you to have a physical Calibration certificate, issued in your name and matched to the Laser via its serial number, you must ensure you tick the above box marked "Paper Certificate" (where applicable) to add a Calibration certificate to your order. The Certificate will then be generated and included with your Laser. Please note the issuing of a Calibration certificate DOES NOT delay or hold up the despatch of your Laser in any way.

Kit comprises of:

LR20 Spectra Detector with rear mechanical clamp

Set of 5pc x type AA NiMH rechargeable batteries

Universal mains charger

12V dc power cable & adapter

Magnetic Mount, type MMM

Hard carry case 

User Manual & Safety Instructions

2 Year Warranty

VAT Invoice:

When the order is dispatched, a PDF (digital copy) of the VAT invoice will be attached to the dispatch confirmation email and a paper copy of the VAT invoice will be in the box.

Key information:

Model LR20-1
User Guides & Datasheets:


Spectra LR20 User Guide

Spectra LR20 Datasheet


Spectra LR20 Datasheet


Spectra LR20 Datasheet

Norwegian (bokmål)

Spectra LR20 Datasheet


Spectra LR20 Datasheet


Spectra LR20 User Guide

Spectra LR20 Datasheet


Spectra LR20 Datasheet


Spectra LR20 Datasheet


Brand Spectra Precision
Type Magnetic Detector / Receiver
Laser beam Dot
Laser colour Red Beam
Usage Outdoor
IP rating IP67 (Dust tight / Protected against the effects of temporary immersion)
Warranty Automatic 2 Year Warranty

You may also be interested in the following similar products:

Spectra LR50W-MM Detector Kit

Spectra LR50W-MM Detector Kit

Was: £1,299.99

Sale Price: £1,249.99 Incl. VAT: £1,499.99


Questions and answers about this product:

Please click the relevant question to display the answer. Or you can ask your own question by clicking the "Ask a Question" button.

Common Questions: Can you ship to my country and how much does it cost?
Answer: Yes, we deliver worldwide. Simply add your products to the basket and at the checkout enter your details and it will then calculate the cost of delivery and show you a full total.
Common Questions: I am outside the UK and have an EU V.A.T, C.B.L, T.V.A, MOMS, I.V.A, BTW or USt number - How do I remove UK VAT?
Answer: You can enter your V.A.T, C.B.L, T.V.A, MOMS, I.V.A, BTW or USt number at the checkout and if it is valid, UK V.A.T will then be removed and set to 0%.
Common Questions: Is the product in stock?
Answer: Yes, if it says 'In Stock' then it's in Stock.

Posted by Chris Gaskell on Tuesday 2nd of October 2018


Will this work with my green laser? Thanks


  • Posted by Laser Levels Online - Support on Tuesday 2nd of October 2018

    Hi Chris,

    No I am afraid magnetic machine control detectors for plant equipment only work with red beam rotary lasers.

    We get asked a lot but are unaware of any brand making detectors of this type for green beam lasers.

    Best regards

    Mark Roberts 

    Laser Levels Online

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