Select an FAQ from the list below or use the search filter to narrow the list of FAQs.
If you have a question that is not answered anywhere please get in touch with us.
Does Geosense operate in other locations globally?
All our products can be purchased either directly from our UK HQ or through our network of local partners, see our distributors page (Contact) to find a representative in your local area.
Are you ISO 9001 accredited?
Yes, Geosense is fully accredited to ISO 9001:2015 and the quality of our products and procedures is of vital importance.
Do you offer bespoke sensor options?
Yes. Geosense has its standard sensors as stock items but we also offer bespoke solutions to cater for particular monitoring needs.
Do you offer installation for your sensors?
As a manufacturer, we do not offer subcontract installation but we can provide on-site training or put you in contact with one of our installation partners worldwide.
Can you ship products worldwide?
Yes. Geosense has experience of shipping to over 70 countries worldwide. We have expertise in-house to ensure the packaging, paperwork and customs procedures are all compliant with international regulations.
Does Geosense manufacture its sensors?
Yes, Geosense sensors are designed, manufactured, and calibrated at our manufacturing facility based in the UK.
How can I enquire about your products?
Please either send an email to email@example.com or call +44 1359270457 and one of our sales team will be happy to help.
What warranty do you offer on your products?
Geosense offers an industry-leading two-year warranty on all products. Our warranty information can be found in our terms.
Do you accept credit card payment?
We can accept credit card payments for UK orders only.
Can I pay using multiple currencies?
We deal in three main currencies – GBP, USD or EUR. Other currencies can be accessed upon request.
Do you offer credit accounts for buying your equipment?
Yes, please contact firstname.lastname@example.org to enquire about a credit account. Please note successful application will depend on a number of factors.
What should I do if I haven’t taken my zero-pressure reading for my VW piezometer?
Whilst it’s not an ideal situation, the following may help…
- Refer to the calibration sheet for a specific piezometer and note the Average reading in Digits at ‘0.0’ pressure reading. This should be ‘close’ to the installation zero.
- Elevation, atmospheric pressure and temperature will also affect the Zero so it is necessary to compare the site values with those detailed on the calibration sheet. A more accurate ‘calculated’ zero can then be created by compensating for any significant differences.
If you need assistance with these calculations, please contact the Geosense support team by email to email@example.com or call +44 1359270457.
What grout mix should I use for my vibrating wire piezometer for the fully grouted method?
Grout mixes should always be provided by the instrumentation design engineer taking into account local ground conditions. Permeability if the key factor to be considered. For further information, read the blog ‘Fully Grouted Method – Grout Selection‘.
Contreras et al. (2008, 2012) identified that the permeability of grout can be up to three orders of magnitude higher than the permeability of the surrounding soil without inducing a significant error.
The document ‘2020 ISO 18674-4 Measurement of pore water pressure: Piezometers‘ provides specifications for grout according to soil type. In the UK, it can be ordered from the British Standards Institution.
What grout mix should I use for my Geotechnical Instruments
Grout mixes should always be provided by the instrumentation design engineer taking into account local ground conditions.
The general rule for grouting any kind of instrument in a borehole is to try and mimic strength and deformation characteristics of the surrounding soil rather than permeability.
While it is feasible to match strengths, it is not really feasible to match the deformation modulus and it is a more sensible approach to minimise the area of the grouted annulus with an approximate strength grout so that the column will only contribute a weak force.
Take a look at our easy-to-use Grout Calculator developed to work out the quantity of cement, Bentonite and water required according to soil type, bore diameter, depth of bore and number of boreholes.
Can I re-use the original baseline after I remove and replace the IPI string?
We would suggest no. If sensors are pulled from the casing and then reinstalled, the previous baseline readings are unlikely to be comparable. Output will stabilise after time but even slight differences in the positioning of the sensors will appear as changes (movement) in plots. It is better to establish a new baseline.
Where is your inclinometer casing made and what material is it made from?
Geosense 70mm QJ and XC casing is made in the UK from high impact 100% virgin ABS.
What spacings do you recommend for tilts strings (IPI or Tiltbeams)?
The answer to this question very much depends on the application and project type. However shorter spacings are not always better and using longer spacings where applicable will save clients’ money and time. The recent ISO 18674-3 Measurement of displacements across a line: Inclinometers standard recommends spacings up to 2m for IPI strings.
Why do you use PUR cable?
PUR cable is very robust and especially resistant to puncture and abrasion. It is also more UV stable than other jacket materials.
Do vibrating wire sensors use a lot of power?
No, vibrating wire sensors require incredibly low power to ‘excite’ and read. This is why many vibrating wire enabled dataloggers have very long battery life, even at short monitoring intervals.
What piezometer filter type should I use for the fully grouted method?
We strongly recommend using a LAE (low resistance to air entry) stainless steel filter for all Geosense vibrating wire piezometers installed using the fully grouted method.
ISO 18674-4 Piezometers states High air entry porous filters shall not be used with the fully grouted method unless there is a means of removing air from the piezometer.
How do I counteract buoyancy of my access casings (inclinometer or magnetic extensometer)?
All access casings can be filled with clean water to counteract buoyancy during installation. We strongly advise against holding the casing down by loading the top as it will cause snaking in the casing.
The preferred approach is to either anchor the base of the tube or for a temporary weight to be lowered to the base, inside the casing.
How do I convert from Hz to digits?
Our VW gauges are calibrated using Digits, but some dataloggers read gauges in Hz. It is necessary to convert Hz to Digits to use the calibration factors. Use the following equations:
From Hz to Digits: (Reading in Hz)2 / 1000
From Digits to Hz: √ (Reading in Digits x 1000)
Do your Vibrating Wire piezometers have lightning protection?
Yes, all our piezometers are fitted with 90V Gas Plasma Arrester which protects against voltage spikes.
However, it is recommended that primary lightning protection should be installed where cable runs or terminal equipment might be exposed to lightning strikes.
Can Geosense readouts be used to read other manufacturers’ vibrating wire sensors?
Yes, Geosense readouts can be used to take readings from most historically installed and current Vibrating Wire sensors.
Can I shorten or extend VW sensors cable?
Yes, you can shorten or extend VW cables as much as you like. It will not affect the calibration or void your warranty. It is recommended that epoxy resin joints are used but this is not essential if the joint is not exposed to the elements. However, it is not recommended to have a joint within a borehole. Care should be taken to avoid strain on the cable in the jointed zone.
Are your Vibrating Wire piezometers temperature calibrated?
Yes, every Geosense pressure sensor is temperature calibrated from factory as standard therefore readings can be compensated for small effects of thermal changes.
I am not sure which exact sensor I need, are you able to advise?
Yes, our technical sales engineers can help with product selection as well as discuss your monitoring needs to ensure the best products for your application.
I have been provided with some data from your sensors, but I did not buy the equipment. Can you still help?
Yes, our technical support is available to anyone, whether they are prescribing a job or looking at the data. Please send an email to firstname.lastname@example.org or call +44 1359270457.