Through recording the magnetic susceptibility & conductivity of exposed bedrock it is possible to construct a comprehensive infield assessment of the changes to geochemical and mineralogical composition along outcrops, thus ensuring complex lenses, enclaves and other bodies are identified and mapped correctly. The Terraplus KT-10 magnetic susceptibility & conductivity meters are tailored towards characterising rock samples or drill cores by offering interactive metadata and QC functions to aid maintain data quality throughout a survey.
The KT-10 is capable of recording single measurements or being used in scan mode which enables a user to record magnetic susceptibility & conductivity profiles of drill cores, monolith samples or exposed sections. Results collected in scan mode are able to be transmitted via Bluetooth and displayed/ recorded in real time to an external device running GeoVision, an Android App supplied with the instrument. GeoVision enables the operator to browse through records, display field measurements and better manage/ adapt their field acquisition strategy to account for observations made during data acquisition.
KT-10 Magnetic Susceptibility and Conductivity Meter. Each instrument is supplied with a pre-installed calibration curve derived from samples containing different concentrations of magnetite. Alternatively operators are able to formulate and save their own calibration curves.
Can I use the KT-10/KT-20 to measure small chips, pebbles, shavings, or powder samples (for example, drill chips from reverse circulation drilling)?
Yes. With some preparation, both the KT-10 and KT-20 can be used to measure the magnetic susceptibility and/or conductivity of small chips, pebbles, shavings, or powder samples. In order to make an accurate measurement, the samples should be
formed into a bulk sample that is larger than the KT-10/KT-20’s sensor (i.e. larger than the 66 mm diameter for circular sensors) with a thickness of at least 5cm (~2 inches). The samples can be aggregated in a thin plastic bag or glass container (e.g. Petri dish).
What are calibration and reference pads? Do I need one for my KT-10/KT-20?
Calibration/reference pads are used as a check source to verify the accuracy of measurements taken by the KT-10 and KT-20 systems, whether for magnetic susceptibility, conductivity, or IP/resistivity. Calibration pads have the added benefit of allowing users to recalibrate their magnetic susceptibility measurements. Although they’re not required, these pads can prove to be useful tools in validating your measurements. Many groups have a policy of testing their KT-10/KT-20 units at the beginning and end of each work day. These pads are particularly useful when multiple KT units are being used on a project to confirm that each of them is measuring a similar value.
A variety of different calibration/reference pads are available depending on the method being measured. Each pad comes with a test certificate and is compatible with a range of different models. All of the pads are compatible with the KT-20 system, subject to the type of sensor being utilized, and all Flat magnetic susceptibility and conductivity pads are compatible with the KT-10 system. Although the pads are designed for the KT-10 and KT-20 systems, they can also be used with other instruments. Magnetic Susceptibility Calibration Pads
Magnetic Susceptibility Calibration Pads
Conductivity Reference Pads
IP/Resistivity Reference Pad
A dedicated reference pad, the IP-T10, is also available to verify the various measurement parameters shown below of the KT-20’s IP/Resistivity Module.
Note Measurement values are influenced by external factors, such as temperature, environment, and the operator’s technique during the measurement sequence (e.g. the pressure applied on the sample during measurement). This may lead to slight differences observed between the measurement and the nominal value indicated for each pad.
What is the conductivity sensitivity for the various KT-10 models and KT-20 sensors?
Refer to the charts below for the range of conductivity sensitivities available.
The conductivity sensitivity for the KT-20 system is dependent on the sensors being used with the KT-20 console. See below for a breakdown of the conductivity sensitivities available with each applicable KT-20 sensor:
What is the depth penetration for the KT-10 and KT-20 system?
The depth penetration for the KT-10 and the KT-20’s standard sensors is approximately 4cm, with 90% of the readings coming from the first 2cm of a sample. The KT-20 can achieve greater depths when combined with the 3F-32 large diameter sensor.
The 3-frequency (1/10/100 kHz), 32cm diameter (3F-32) sensor has a depth penetration of +/– 32cm (subject to the electrical properties of the soil, the frequency used, and the size and characteristics of the source being measured) and is recommended for agriculture, archaeology, and environmental investigations.
What is the magnetic susceptibility sensitivity for the various KT-10 models and KT-20 sensors?
Refer to the charts below for the range of magnetic susceptibility sensitivities available.
The magnetic susceptibility sensitivity for the KT-20 system is dependent on the sensors being used with the KT-20 console. See below for a breakdown of the magnetic susceptibility sensitivities available with each applicable KT-20 sensor:
What upgrades are available with the KT-10 and KT-20 system and how do they work?
All “Remote” upgrades are available upon purchase or can be added remotely via an online firmware upgrade, eliminating the need to send the unit back to Terraplus. Remote upgrades are accessed by entering an unlock code (provided by
Terraplus) on the GeoView software or, in the case of the KT-20, on the device itself. Any upgrade added after the initial purchase is subject to an upgrade fee.
Note that all KT-20 upgrades apply to the console itself, rather than the individual sensors. For example, once a KT-20 console has been upgraded with the Plus functionality, all applicable sensors connected to the console will have access to the
upgrade – including sensors purchased at a subsequent date.
Magnetic Susceptibility Calibration pads.
Two calibration pads with low or high susceptibility values are available to verify the KT-20’s magnetic susceptibility measurements. These calibration pads can also be used to recalibrate the magnetic susceptibility readings.
Conductivity Reference pads
Three reference pads are available to verify the KT-20’s conductibility measurements. These reference pads are available with low, medium or high conductivity values.