Equipment for Surveyors

A laser distance meter measures distances quickly, without having to stretch out a tape measure, and the more complete models also calculate areas and volumes. It is useful for surveying rooms, checking levels and checking walls and floors. The stated accuracy varies between models, so read the data sheet before choosing.

Line lasers project straight beams and suit tiles, partition walls and interior alignments. Rotary lasers cover the whole site and are used to level floors and large areas, with accessories such as a receiver and a tripod. Choose according to the area to be covered and the type of work you do most often.

The laser class indicates how much energy the instrument emits and what precautions are needed to protect the eyes. This information is given on the product sheet and should be read before use. Never point the beam at people and never look directly at the beam, even from a distance.

A crack gauge measures how wide a crack is over time, fitted across a wall, a corner or a flat surface, to see whether the crack is stable or moving. It is fixed over the crack and the change is read, usually over several successive checks. For structural cracks, the reading must always be interpreted by a qualified professional.

The 160 cm octagonal ranging pole with forged tip is a graduated rod used as a vertical reference for measuring heights and levels. Choose the height according to the distance to be read and the visibility from the station point. The tip helps it grip the ground, but the pole must always be held vertical while reading.

The capacity in Wh shows how much energy the battery can deliver and helps you work out how long a device will stay on. Compare the power in watts of your tools with the capacity of the power station, bearing in mind that the real output is often lower than the rated value. Models such as the RIVER mini 210 Wh and the DELTA mini at 1,400 W represent different sizes.

For power banks, what counts is the capacity in mAh, the power in watts and the number and type of ports, such as USB-C or wireless charging. For portable solar panels, look at the stated watts and whether there is a USB-C output. Check that the charger and the cable are compatible with the device to be charged.

The surveyor uses them for surveys, setting out and level checks, both on site and at the design stage. Laser distance meters and levels are used to check the alignment of walls, floors and services. Power stations and portable chargers are useful when there is no electrical socket on site.