New Draft International Standard on Piezometers is available for public comment

A new draft international standard prEN ISO 18674-4 - Geotechnical investigation and testing -- Geotechnical monitoring by field instrumentation. Part 4: Measurement of pore water pressure: Piezometers is available for public comment until 23 September 2019. Anyone who is interested can register to view the document at and then add comments if they wish.

Watch Again

In 2017 Geotechnical Observations’ Managing Director Andrew Ridley gave the John Mitchell Lecture at the Institution of Civil Engineers in London. Click on the image above to watch the lecture “Monitoring the Performance of Clay Slopes.” We are pleased to announce that Andrew will reprise and extend the lecture in a Keynote Address to the 7th International Symposium on Deformation Characteristics of Geomaterials, to be held in Glasgow on 26th - 28th  June  2019.

GE Instrumentation & Monitoring Conference 2019

Geotechnical Observations is delighted to be a Gold Sponsor for Ground Engineering’s Instrumentation & Monitoring Conference in March 2019. We are particularly excited to announce that our Director Jonathan Gammon will be delivering a Keynote Address on Trends and developments in instrumentation, monitoring and data in geotechnics. Read an interview with Jonathan here. In addition Gary Evans will present a talk on Lessons learnt from instrumentation and monitoring on the Northern Line Extension and Andrew Ridley will give an update on ISO 18674 Geotechnical Monitoring using Field Instrumentation. Put this together with a presentation on the instrumentation used to monitor Claridge’s Hotel during the construction of a five storey basement below the working hotel given by Dinesh Patel of Arup and the evening roundtable discussion that is also sponsored by GeO, makes this a must be at event if you want to find out more about what we do. Click on the image above to visit the registration page.

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New Appointment

We are pleased to announce that Jonathan Gammon has joined Geotechnical Observations as a Non-Executive Director. Jonathan is a Chartered Civil Engineer and a Chartered Geologist with over 40 years of experience on a wide range of UK and international projects such as Crossrail, HS2, West Rail in Hong Kong and the Dublin Metro North project. He has a very strong background in Instrumentation and Monitoring, and has been involved in the specification and procurement of I&M throughout his career.

Until recently Jonathan was Technical Director for Tunnels and Geotechnics at the global consultancy CH2M, so we are very excited that he will be joining us and look forward to receiving the benefit of his experience.

NCE Tunnelling Awards 2018

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We are very pleased to announce that GeO's Northern Line Extension team has been shortlisted for an NCE Tunnelling Award in the Community Engagement category. This is for the work done in the Kennington area of south London, where they installed, read and decommissioned over 300 survey points to protect 73 properties. Access was negotiated with 123 different people and required dedication and professionalism. Well done team!!

Chalk 2018 Conference

We are pleased to announce that we will be sponsoring the Chalk 2018 conference. The conference is being organised by the British Geotechnical Association (BGA) and will be held at Imperial College London (IC) on 17th and 18th of September 2018. Geotechnical Observations has a very long relationship with BGA and IC, so we are proud to be associated with this prestigious event. We are sponsoring students at the event and will be putting up our exhibition stand.

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Inclinometer Standard


A new standard has been published on inclinometer measurements. This is the third in a series of standards that are the work of the ISO TC182 WG2 committee. The first two standards were on General Rules and Extensometers. The Working Group is currently drafting new standards on piezometers and total pressure cells. You can purchase the inclinometer standard from BSI  at the following URL:

Calibrating inclinometer probes

Mohamed (Instrumentation Engineer at GeO) being trained in how to calibrate an inclinometer probe using our UKAS certified rotary table.

All of our inclinometer probes are examined and cleaned after every site visit. They are put through a static tube test every week, to track the check-sums under repeatable conditions. This identifies any changes, such as worn bearings, at an early stage. They are checked using our rotary table every three months and a new calibration certificate is issued if any adjustments are done. A full calibration is carried out every 12 months.

We believe this process helps us deliver high quality inclinometer measurements in piles, retaining walls and slopes. Contact us if you want to hear more about how we do this.

Simple just became Easy

SAAV is the newest and most advanced ShapeArray model.


Inspired by direct feedback from customers, SAAV uses a new, unique, off-the-reel cyclical installation system, which inserts the ShapeArray in a zigzag pattern into casings from 47 mm to 100 mm in diameter. The SAAV is then locked into place with a Spring Box assembly.

SAAV is ideal for using in existing conventional inclinometer casings or for new installations into smooth casings such as reservation tubes in piles and diaphragm walls.

SAAV is available with 500 mm long segments and in total lengths of up to 150 metres.