Mobile resistivity meter Loresta-FX

Precise resistance measurement of conductors and semiconductors

For simple process and quality control

The Loresta-FX mobile resistivity meter becomes precise Measurement of conductors and semiconductors in the lower resistance range used. It offers a Measuring range from 10⁻² to 10⁶ Ω.

To determine the specific resistances, a manually adjustable correction factor It uses a system that enables sufficiently accurate calculations for process and quality control. New features of this model include a color display, a direct USB-C port for connecting to a PC, and power supply via rechargeable and replaceable NiMH batteries or the included power cable.

Handheld measuring device Loresta-FX — Mobile resistivity meter Loresta-FX

4-point measurement method for highly precise measurement results

The Loresta-FX measuring device works according to the 4 point measurement method, which is based on the four-wire process and was developed to eliminate the influence of contact resistance. This method ensures highly precise measurement results by separating current and voltage circuits.

Mobile resistivity meter with versatile 4-pin measuring heads

The Loresta series offers a variety of specialized 4-pin measuring heads that are optimally adapted to a wide variety of applications – especially for precise Resistance measurement on very small samples or thin layersThe measuring heads are based on four needle-like electrodes positioned at an equidistant distance from each other. This defined geometry facilitates the precise calculation of the correction factor, which is crucial for reliable measurement results.

By default, the electrodes are arranged collinearly; alternatively, other geometries, such as a square arrangement, are available. During the measurement, a constant direct current is applied via the two outer electrodes, while the two inner electrodes detect the voltage at the sample surface. This allows the electrical resistance of the sample to be precisely determined – even for thin materials or materials with delicate structures.

Data storage and transmission

The Loresta-FX can automatically save up to 999 measurement results and conveniently transfer them via the USB-C interface using the optional application software.

Battery compartment handheld measuring device Loresta-FX

Loresta-FX or Loresta-GX? Read our article: Comparison of the Loresta GX and Loresta FX measuring devices >>

Loresta-FX specifications

Item number	Loresta FX MCP-T380
Measurement method	4-pin measuring head, constant current method
Measuring range	10^-2 - 10⁶
Display	LCD
Power supply	AC90-264V / 47-63Hz 4x Ni-MH battery or connection via power cable
Interface for data output	999 measurements data storage internal USB-C port (application software available separately)
Sold in sheets:	85mm x 228mm x 65mm
Weight	0,35 kg
Standard accessories	ASP measuring head RMH501 / power cable / instructions
EC Declaration	Devices including EC Declaration of Conformity (CE Marking) / UK Declaration of Conformity (DoC): All our devices meet the applicable European and British standards for safety and quality.
conformity standards	EN 61000-6-3:2007, EN 61000-6-1:2019, EN 61010-1:2010/A1:2019, EN IEC 63000:2018
warranty	Our devices are covered by a 12-month warranty.

Measurement range of the Loresta-FX

Measuring range [Ω]	10 ^-2	10 ^-1	10 ⁰	10 ¹	10 ²	10 ³	10 ⁴	10⁵	10 ⁶
Electricity	100mA	100mA	10mA	10mA	1mA	1mA	100	10	1
Accuracy	± 1.0% ± 20dgt.	± 1.0% ± 5dgt.	± 0.5% ± 5dgt.	± 0.5% ± 3dgt.	± 0.5% ± 3dgt.	± 0.5% ± 3dgt.	± 0.5% ± 3dgt.	± 0.5% ± 3dgt.	± 2.0% ± 5dgt.

Loresta-FX mobile resistivity meter – Typical applications

The Loresta-FX portable resistivity meter is the ideal choice for production engineers and quality inspectors looking for a reliable, portable measuring device. It combines precision, versatility, and ease of use to meet the demands of research and development, production engineering, and quality control.

The measuring device supports development and quality assurance teams in the fast and reliable characterization of materials – especially where exact surface resistance values are crucial for product performance.

Conductive materials:

conductive paints, pastes, varnishes, toners
conductive plastics and elastomers
fabrics, fibers
Film materials, slides
Ceramics
metallic thin films
amorphous silicon
antistatic materials
EMC sheets/materials
ITO glass, coated glass
coated materials, magnesium alloys, galvanized steel plates

Resistance measurement on functional textiles

Conductivity testing for industrial fabrics

Conductivity measurement of smart textiles with integrated conductive structures

Electrical properties of smart textiles

Measurement of electrical properties of silicone and rubber

Quality testing of insulating and antistatic plastics

Measurement of printed circuit boards to determine electrical resistivity

Precise testing of electronic structures

Analysis of high-insulation materials

Resistance measurement of metallic foils and thin films

Conductivity analysis of thin materials

Determine surface resistance

Material analysis for electronics applications

Resistance measurement of paints with conductive or antistatic properties

Conductivity of coatings

Measurement of paints to determine surface resistance

Testing of electrical properties

Electrical testing of cable insulation and plastics

Resistance measurement in electronics

Measurement of conductive rubber to determine electrical resistance

Elastic conductive materials

Semiconductor analysis

Measurement of semiconductor materials

Analysis of insulating materials

Measuring heads for the Loresta-FX

Various types of measuring heads are available, which can be used depending on the nature of the measuring object. The standard length of the measuring head cable is 1,5 m. The cable length of the measuring heads can be customized. Available lengths: 3 m, 4 m, 5 m, 7 m, and 10 m.

BILD	Measuring head	Application	Pin spacing	Pin tip Ø	Spring pressure	Probe tester
	ASR measuring head RMH501	Standard accessories	5.0 mm	0.37 mm	210g/pin	RMH304
	ESR measuring head RMH502	non-uniform samples	5.0 mm	2 mm	240g/pin	RMH304
	LSR measuring head RMH503	soft surfaces	5.0 mm	2 mm	130g/pin	RMH304
	QR measuring head RMH505	smallest samples	1.5 mm	0.26 mm	70g/pin	RMH313
	PSR measuring head RMH504	small & thin samples	1.5 mm	0.26 mm	70g/pin	RMH311
	BSR measuring head RMH506	large samples	2.2 mm	0.37 mm	210g/pin
	NSCR measuring head RMH507	hard surfaces silicon wafer	1.0 mm	0.04 mm	250g/pin	RMH312

4-point measuring head for precise resistance measurement

Reliable measurement on difficult surfaces

Robust measuring solution for solid materials

Measurement solution for small components

Measuring head for large-area materials

Practical examples of resistance and resistivity measurement of various materials

ABS plastic with aluminum coating

Measurement of electrical resistivity

ASP measuring head

Carbon fiber fabric

Measurement of electrical resistivity

ASP measuring head

Coated aluminum foils

Measurement of electrical resistivity for different coatings

ASP measuring head

Resistance measurement of printed circuit traces on flexible substrates

Printed conductor tracks

Measurement of the electrical resistivity of printed electronic conductor tracks on textile fabrics

LSP measuring head

PVC compounds

Measurement of electrical resistivity

ASP measuring head

PU adhesive

Measuring the electrical resistivity of a cured polyurethane adhesive

LSP measuring head

Further practical application examples

Development of conductive plastics for ESD applications
When formulating plastics with electrically conductive additives (e.g., carbon black, graphene, CNTs), the Loresta-GX II is used to determine the sheet resistance in Ω/□ to ensure that the material meets antistatic properties (typical target range: 10⁵–10⁹ Ω/□).
Optimization of coating processes in semiconductor manufacturing
Thin conductive layers (e.g., ITO, PEDOT:PSS) are tested for their homogeneity and resistivity. The device can be used to measure specific resistivity at specific points or across a large area, allowing process parameters to be adjusted.
Evaluation of conductive printing pastes and inks
For printed electronics (e.g. for flexible displays or RFID tags), the device is used to measure the electrical resistance to ensure functionality and to compare different formulations.
Material characterization for fuel cells or supercapacitors
Electrode materials with high resistivity requirements (S/cm range) are precisely measured to optimize performance data such as internal resistance and current density capability.