Travelling Beam Device (Product Code: SLE/CE/87) is a wheeled 3 m profile beam used to detect surface irregularity of concrete and asphalt road pavements in construction checks and highway engineering practicals. A middle wheel measures vertical deviation from the line between the two end wheels, up to ±25 mm, and a recording unit draws a graph of the deviations. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM supplying engineering educational equipment in India, at its own factory in Ambala.
| Parameter | Detail |
|---|---|
| Purpose | Detecting road surface irregularity on concrete or asphalt pavements |
| Construction | Beam with rigid wheels at both ends and a measuring wheel at the middle |
| Beam length | 3 m |
| Measurement | Vertical deviation of the surface from the straight line between the end wheels |
| Scale | 2 mm increments up to 10 mm; 5 mm increments from 10 to 25 mm |
| Maximum vertical deviation | ±25 mm |
| Recording | Supplied complete with recording unit to obtain a graph of vertical deviations |
| Weight | Approx. 55 kg |
| Product code | SLE/CE/87 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How smoothly a road rides depends on how regular its surface is along the direction of travel. The travelling beam is pushed along a lane: its two end wheels set a 3 m reference line, while the middle wheel rises over bumps and drops into dips. The movement is shown on the scale and traced by the recording unit, so the graph reveals exactly where the surface departs from a true line and by how much.
Because it rolls continuously, the beam surveys a whole length of new pavement in one pass instead of one spot at a time. Use it on freshly laid layers before acceptance, and on existing roads for condition surveys. Keep the wheels clean of bitumen and grit, check the scale reading on a flat reference surface before starting, and move the approx. 55 kg beam with two people.
ScienceLab is the trading name of Jain Scientific Equipments Private Limited, a registered MSME enterprise (Udyam UDYAM-HR-01-0003714) whose major activity is manufacturing. The company is the OEM of this travelling beam device, which is produced at its own licensed factory at Saha, Ambala, Haryana, India.
Highway departments, engineering colleges, dealers and importers are supplied factory-direct, and export consignments are handled under Importer-Exporter Code AAECJ8618A (DGFT). For replacement wheels or recording-unit parts, ask the manufacturer directly. Read more on the ScienceLab profile.
These items are used in pavement surface and layer investigations:
For further road, soil and concrete apparatus, visit the Civil Engineering Lab Equipment category.
What does the Travelling Beam Device measure?
The Travelling Beam Device (SLE/CE/87) detects road surface irregularity by measuring how far the pavement deviates vertically from the straight line between the two end wheels of its 3 m beam. It can be used on both concrete and asphalt pavements.
What measuring range and scale does the travelling beam have?
The Travelling Beam Device measures a maximum vertical deviation of ±25 mm. Its scale is marked in 2 mm increments up to 10 mm and in 5 mm increments from 10 to 25 mm, which suits both small ripples and larger dips.
Does the Travelling Beam Device record its readings?
Yes. The Travelling Beam Device is supplied complete with a recording unit that produces a graph of vertical deviations as the beam moves. The trace gives a continuous record of the surveyed length that can be kept with the site report.
How is the travelling beam different from a 3 m straight edge?
A 3 m straight edge checks the surface at one position at a time, whereas the Travelling Beam Device is rolled along the pavement and records deviations continuously. Many highway laboratories use the straight edge for quick spot checks and the beam for longer runs.
How heavy is the Travelling Beam Device?
The Travelling Beam Device weighs approximately 55 kg. It runs on its own wheels during a survey, but two people should lift it on and off a vehicle, and it should be stored so that the beam and wheels are not knocked out of line.
Who manufactures the Travelling Beam Device?
The Travelling Beam Device is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own factory at Saha, Ambala, Haryana, India. Quotations come directly from the manufacturer for buyers in India and international markets.
Is a calibration certificate available for the Travelling Beam Device?
Calibration-certificate availability for the Travelling Beam Device should be discussed with us when you enquire. Tell us what your contract or laboratory records require, and we will confirm what documentation can accompany the beam.
Request a price for the Travelling Beam Device through the contact page or the enquiry cart. You will receive the quotation straight from the manufacturer.
Last updated: 24 September 2026