Boltight has been at the forefront of hydraulic bolt tensioning for over a decade. Our tensioning tools provide fast, accurate and safe solutions to tighten and loosen multiple bolts simultaneously.


Echometer is our entry-level ultrasonic bolt measurement product, it is a small battery-powered handheld device that measures bolts up to 2m in length. With a digital screen and simple scroll menus, very little training is required - it is quick and easy to use. It has built-in data recording and reporting through a RS232 interface.

Fully compatible with the Echometer+ including data transfer and ancillary equipment.

Weight 0.4kg (including batteries)
Size 63.5mm x 165mm x 31.5mm
Keyboard Membrane switch pad with 12 tactile keys
Power Source 3 x 1.5V alkaline or 1.2V NiCad AA cells. Typically operates for 150 hours on alkaline and 100 hours on NiCad. Auto power off if idle for 5 minutes.
Memory 16 Mb internal RAM
Data Output Bi-directional RS232 serial port; Windows PC interface software.

There are several things to consider when deciding which transducer to use:

  • The crystal diameter should be completely in contact with the bolt end surface.
  • The outside diameter should be clear of any obstruction.
  • The frequency should be chosen to suit the bolt length.
  • The larger the diameter the stronger the signal and therefore better results are obtained by using the largest size transducer that will fit on the bolt.
  • Boltight recommends the 3/8” diameter, 5MHz transducer as the best general purpose covering 90% or more of typical bolting applications.
Size (diameter) Frequency Application
1/8” (3.1mm) 5 Mhz General Purpose
1/8” (3.1mm) 10 Mhz Hi-resolution/short Bolts
3/16” (4.7mm) 5Mhz General Purpose
1/4” (6.3mm) 2.25 Mhz Long Bolts
1/4” (6.3mm) 5 Mhz General Purpose
1/4” (6.3mm) 10 Mhz Hi-resolution/Short Bolts
3/8” (9.5mm) 2.25 Mhz Long Bolts
3/8” (9.5mm) 5 Mhz General Purpose
1/2” (12.7mm) 2.25 Mhz Long Bolts
1/2” (12.7mm) 5 Mhz General Purpose
3/4” (19.0mm) 2.25 Mhz Long Bolts
3/4” (19.0mm) 5 Mhz General Purpose


Diameter reference Outside diameter
1/8” (3.1mm) 0.38” (9.6mm)
3/16” (4.7mm) 0.38” (9.6mm)
1/4” (6.3mm) 0.75” (19.0mm)
3/8” (9.5mm) 0.81” (20.5mm)
1/2” (12.7mm) 1“ (25.4mm)
3/4” (19.0mm) 1.21” (30.7mm)


Diameter reference Outside diameter
1/8” (3.1mm) 0.23” (5.8mm)
1/4” (6.3mm) 0.355” (9.0mm)
1/2” (12.7mm) 0.605” (15.3mm)

Download software:
Boltight Echometer Software Version 4.06c (Windows)
Boltight Echometer Software Version 4.06c (MacOSX)

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