REDwire Three features to look for in non-contact metrology equipment

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When industry demanded faster and more accurate non-contact metrology equipment, Acuity introduced its AR700 series of laser displacement gauges.

When industry users demanded faster and more accurate non-contact metrology equipment, Acuity introduced its AR700 series of laser displacement gauges for measuring position and object dimensions. The new models feature higher speeds, as well as better resolutions and a more compact size than the predecessor, the AR600 series. Speed, resolution and size, in fact, are key attributes that users should consider when selecting non-contact metrology equipment.

1. Speed

This Acuity digital sensor has selectable speeds up to 9,400 Hz — a unique feature, the company says. 

“Acuity laser distance sensors are unique and our specifications are straightforward. The device will, in fact, output 9,400 distance readings in a single second,” the company explains. “This is unlike our competitors who often quote the maximum sampling rate of their detector. This number is not real because the user will never see data output rates that high through serial or analog interfaces or the cumbersome controllers that are required to operate their sensor heads.”

A special “trigger mode” permits users to initiate sampling via serial command or discrete hardware triggers. This trigger can be used for synchronizing multiple sensors. The maximum speed using the hardware trigger is reduced to 4,500 Hz.

2. Resolution

Optics and digital detectors have improved greatly over time, and Acuity's AR700 laser distance sensor offers a three-fold improvement of resolution over its previous model. Resolution is the smallest increment of distance that can be detected by the distance gauge. AR700 sensors specify a 0.005 per cent resolution for all models in this series.

3. Compact size

The unit is very compact, measuring 25 by 50 by 75 mm — almost 80 per cent smaller than its predecessor. It houses all electronics for measuring. No external controller or amplifier is needed. Each sensor includes the sensor head and two metres of cable. 

Acuity’s AR700 series of laser displacement gauges are available from Pickering, Ont.-based Durham Instruments

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