MTN02
Multi-purpose thermal needle system for thermal conductivity / resistivity measurement
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- laboratory & field measurements
- NSSP technique
- local calibration/conformity assessment
Multi-purpose thermal needle system for thermal conductivity/resistivity measurement
The MTN02 performs fast measurements of the thermal conductivity and resistivity of soils. Measurement with MTN02 complies with ASTM D5334 and IEEE 442 standards. The system is primarily designed for laboratory (indoor) measurements but can also be used for on-site (field) measurements. MTN02 is operated and powered from the handheld control and read-out unit CRU02.
- laboratory & field measurements
- NSSP technique
- local calibration/conformity assessment
Specifications
| measurement method | absolute measurement per ASTM D5334-14 and IEEE 442-1981 (03) |
| measurement range | 0.1 to 6 W/(m·K) (all common soils) |
| uncertainty (at 20 °C) | ± (6 % of reading + 0.04) W/(m·K) |
| measurands | thermal conductivity, thermal resistivity, temperature |
| rated operating temperature range | 0 to +50 °C |
| data analysis | initial analysis by CRU, final review of measurement on PC using stored data (required by ASTM) |
| heating interval | 300 s (typical) |
| data storage capacity | 50 measurements |
All specifications
| measurands | thermal conductivity, thermal resistivity, temperature |
| measurement range | 0.1 to 6 W/(m·K) (all common soils) |
| rated operating temperature range | 0 to +50 °C |
| measurement method | absolute measurement per ASTM D5334-14 and IEEE 442-1981 (03) |
| data analysis | initial analysis by CRU, final review of measurement on PC using stored data (required by ASTM) |
| uncertainty (at 20 °C) | ± (6 % of reading + 0.04) W/(m·K) |
| heating interval | 300 s (typical) |
| data storage capacity | 50 measurements |
| length TP07 | 0.12 m |
| diameter TP07 | 3.5 x 10⁻³ m |
| data communication | USB |
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For laboratory and on-site
MTN02 is a thermal needle measuring system both for laboratory and on-site measurement of the thermal conductivity of soils. The measurement method is based on the use of a “thermal needle”. This method employs a heating wire and a temperature sensor in a needle. The MTN02 measuring system consists of the thermal needle, model TP07, mounted on an insertion tool, IT03, and a control and read-out unit CRU02. MTN02 is easy to use. The needle is inserted into the soil. The user performs control and read-out of the measurement from the handheld CRU02. The measurement result is generated immediately by the CRU02 from the analysis of the time series of the temperature and the heating power during the heating interval
MTN02 design and benefits
Suitable for laboratory measurements: MTN02 is primarily designed to perform laboratory measurements. The needle, model TP07, is relatively thin so that common specimens (core samples) may be used. The IT03 can be mounted on a lever that is commonly used in machine shops with which the needle can be vertically inserted into the specimen.
Suitable for (on-site) field measurements: provided that the soil is relatively soft, MTN02 may be used for field measurements. In case of harder soils or measurements at greater depths we recommend use of stronger needles and a lance (like in the system FTN02), or guiding tubes (see below). MTN02 performs measurements as a stand-alone unit.
Suitable for hard soils and concretes: use MTN02 in combination with GT03 Guiding tubes (ordered separately in sets of 5). Using these tubes it is possible to measure in hard materials such as cements and thermal backfill (heavy clay) and dried-out soil by casting them into specimens.
Easy data processing: CRU02 gives an immediate indication of the end result and an indication of the reliability of the measurement. It can store 50 measurements. ASTM and IEEE require that the end result is visually checked and recalculated. This is typically done during later analysis of the measured data in a spreadsheet. CRU02 is connected to a PC by using USB.
Local calibration/conformity assessment: The accuracy of the measuring system can be verified before a survey by measurement in glycerol. For high accuracy verification against a reference material with formal traceability, CRC04 calibration reference cylinder can be purchased separately.
Suggested use
- laboratory analysis of soil specimens
- on-site (field) measurements close to the surface
- with extension for on-site (field) measurements (see TNS02)
Frequently Asked Questions
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How do I choose the right instrument for measuring thermal properties?
Hukx offers a wide range of products for material characterization and measurement of thermal conductivity.
We can offer assistance in choosing the right instrument. But first, you should ask yourself the following questions:
- what material should be analyzed?
- what are the conditions, for instance concerning temperature and pressure?
- what specimens are available?
- are there standards for my application?
- what level of accuracy do I need?
Hukx is a leading manufacturer of thermal conductivity measuring systems and sensors. We have prepared a guide which may assist you in choosing the proper instrument for measuring thermal properties of your material, whether it is soil, plastics, paints, composites, pastes and fluids. Please find the thermal conductivity selection guide in our online offering of guides, notes and white papers.
Hukx is able to offer highest quality products at an acceptable price level. If we cannot offer you an acceptable solution ourselves, we will tell you who can. Please contact us for further assistance.
Where are the sensors (needle, probe, meter) for measuring thermal conductivity?
Hukx sells a range of complete measuring systems including sensors and Measurement and Control Units (MCU). We offer systems and needle type thermal properties sensors for use in the field and for use in laboratory environments.
These thermal properties sensors, TP02 and TP08, are also available as separate probes for use with the user’s own electronics, for instance Campbell Scientific CR1000.
These sensors can be found here. The sensor included in the STPSYS05 non-invasive measuring system can also be purchased as a sensor only (STP05).
Cannot find what you are looking for? Please contact us.
Can I get training or a rental system for the thermal conductivity measuring instrument of my choice?
Expert training for system operators
Although in general the systems can be operated by following manuals and standards, we can provide you with expert training. Training vastly improves the level of service to the third party, the efficiency of working with the equipment and reduces the uncertainty of the end result.
Equipment rental
Unfortunately we have discontinued our rental services for all systems.
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