Spectra AL24

The Spectra AL24 is a practical 24× automatic optical level designed for reliable day-to-day levelling on construction and surveying sites. With clear optics, fast self-levelling and a tough, site-ready build, it supports accurate height transfer and general setting-out work.

24x Magnification: Bright, high-quality optics provide sharp images and a 0.75m minimum focus for tight spaces.
Magnetic Compensator: Automatically stabilizes the line of sight against job site vibrations for ±2.0mm accuracy.
Built-in Bubble Mirror: Allows for fast, eye-level setup without needing to adjust your stance.
360° Horizontal Circle: Integrated degree scale enables quick, accurate layout of angles and corners.
Rugged Metal Housing: Water-resistant, all-metal construction built to withstand harsh daily use on-site.

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Full Description

The Spectra AL24 Automatic Optical Level is built for professionals who need dependable levelling equipment that performs consistently in everyday site conditions. It is widely used across construction, groundworks and general surveying projects where accuracy, simplicity and durability are essential. Equipped with 24× magnification, the AL24 provides a clear and stable view of the staff, supporting confident readings across typical site distances. Its automatic levelling system quickly settles the line of sight after setup, helping maintain measurement accuracy even when working on uneven ground or busy sites. The instrument’s straightforward layout and smooth horizontal movement make it easy to use for both experienced surveyors and site teams. Integrated distance reading marks assist with basic distance checks, supporting efficient site control without the need for additional equipment. Housed in a robust, weather-resistant body, the Spectra AL24 is designed to cope with regular transport and exposure to site conditions. Supplied in a protective carry case, it is well suited to site levelling, cut and fill assessment, foundation work, and general construction layout tasks where reliable results are required day after day.

FAQs

Is the Spectra AL24 durable enough for harsh British weather conditions?

Yes, the Spectra AL24 is built to withstand the unpredictable UK climate. It features a robust, metal housing and is highly resistant to water and dust. The compensator is designed to remain stable even on high-vibration sites where heavy machinery like excavators or rollers are operating nearby, ensuring consistent accuracy regardless of the environment.

What are the key applications for the Spectra AL24 automatic level on a UK construction site?

The Spectra AL24 is specifically designed for a variety of daily levelling tasks common in UK construction. It is most frequently used by groundworkers and site engineers for foundation levelling, establishing sub-base heights for road surfacing, and setting out drainage falls. Its versatile design makes it ideal for both general building work and more precise civil engineering projects.

Is the Spectra AL24 suitable for indoor fit-out work?

While primarily used for outdoor groundworks, the AL24 has a short minimum focusing distance of 0.6 metres. This makes it surprisingly effective for indoor applications, such as checking the level of large floor slabs or installing suspended ceilings in commercial warehouses and industrial units.

What is the benefit of the magnetic damping in the Spectra AL24?

The magnetic damping system in the AL24 acts as a stabiliser for the internal compensator. On active construction sites, ground vibrations from plant machinery can cause the crosshairs to “bounce.” Magnetic damping quickly settles the compensator, allowing the engineer to take an accurate reading faster and with more confidence.

Can I hire the Spectra AL24 for short-term projects instead of buying?

Absolutely. We offer flexible hire options for the Spectra AL24 and other precision survey instruments, which is a cost-effective solution for short-term site requirements. Hiring equipment through us ensures you always have access to a fully calibrated, high-performance unit without the upfront capital expenditure or long-term maintenance costs.

Where can I get my Spectra AL24 or other survey equipment serviced or repaired?

If your equipment requires maintenance, PQS Survey Ltd provides a comprehensive solution. We have an extensive network of depots across the UK, staffed by highly trained service personnel ready to repair or service your equipment. Whether it is a routine calibration or a complex repair, our technical teams ensure your tools are returned to manufacturer specifications with minimal downtime.

What is the accuracy of the Spectra AL24 over a 1km double-run level?

The Spectra AL24 provides a standard deviation of 2.0mm for a 1km double-run level. This level of precision is more than sufficient for the majority of site levelling tasks, including establishing TBMs (Temporary Bench Marks) and verifying site levels against architectural plans.

How does the Spectra AL24 compare to a digital level for site work?

The Spectra AL24 is an optical level, meaning it requires the user to read the staff manually. It is often preferred on UK sites because it is incredibly reliable, requires no batteries, and is very simple to set up. While digital levels can reduce human error, the AL24 remains the “workhorse” of the industry due to its ease of use and lower price point.

How often should survey equipment like the Spectra AL24 be calibrated?

To comply with UK building regulations and quality standards, we recommend that your Spectra AL24 is calibrated every 6 to 12 months. Regular calibration ensures the internal compensator is functioning correctly and helps prevent costly errors on-site. We provide full calibration services for all survey and confined space equipment through our dedicated service centres.