Equipment and spare partsBrowse manufacturers Search by manufacturerEDDY CURRENT NON-DESTRUCTIVE TESTING OF METAL AND TUBES
Rohmann GmbH is a German manufacturer of eddy current non-destructive testing equipment founded in 1977; its site and production are in Frankenthal, Germany. The range covers portable ELOTEST M2 V3, M3, M6 and IS3 instruments, PL650 inline systems, rotating rotors and rail inspection sets.
The specifications come from the manufacturer's pages. The method works only on electrically conductive materials, and the inspection depth is limited: the manufacturer calls 3δ the effective depth of penetration. The manufacturer publishes no article numbers or spare parts catalogue; we do not publish prices, lead times or payment terms for a specific item and do not declare EAEU, TR TS or ATEX certificates. We are neither a dealer nor a representation.
Rohmann GmbH is a German manufacturer of eddy current non-destructive testing equipment, founded in 1977. Address: Carl-Benz-Str. 23, 67227 Frankenthal, Germany; register Ludwigshafen HRB 21207, managing director Petra Rohmann. The company has its own units in China and Hong Kong, France, Japan and the USA.
A German eddy current equipment maker since 1977
Portable eddy current instruments for on-site inspection. The ELOTEST M3 shows conductivity from 1 to 110 % IACS on a 5.7" display. The ELOTEST M6 has a 7" multi-touch screen, built-in C-scan and harmonic analysis. The ELOTEST IS3 covers 10 Hz to 12 MHz, is single-channel and rated IP54.
State the inspection task and the sensor type
Multi-channel systems for inline inspection. The ELOTEST PL650 R carries up to 16 measuring channels, the ELOTEST PL650 RC up to 4; up to 64 sensors connect to one channel, and OPC UA links the system to plant control. The mobile ELOTEST HST 3 combines up to 8 probes with 8 built-in sensors each and runs up to 20 hours on two batteries.
State the channel count, the product and the line speed
Rotating rotors are installed in bar, wire and cylindrical roller inspection lines: miniature MR3, SMR4 and MR6, standard SR1, compact EC15 and the EC30–EC130 family. The Rotor EC15 compact runs at 3,000 rpm from a 24 V drive, covers material from 1.5 to 15 mm and detects defects from 20 µm; the EC30–EC130 family covers 5 to 130 mm.
State the bar or wire diameter and material
Rail applications: the ELORAIL WPG D340 trolley and the spring point inspection set are approved test equipment by DB Netz AG. The EC-Track-Scan system finds head checks and squats at speeds up to 20 km/h with 2 to 8 sensors per rail. The ELOWHEEL RPT 18 inspects wheel rims up to 800 mm in diameter.
State the object: rail, switch or wheel
Robotic and automated solutions for complex parts: ELOSCAN with sensor arrays and the ELOSCAN Compact for turbine wheels with probe changing. A separate system inspects cylindrical rollers with a rotating head (RDE), and another installation covers long products.
State the part geometry and the coverage required
The manufacturer calls sensors the "eyes" of the measuring system and offers them in hundreds of variants. Absolute KAS-31 and PLA-33, the differential KDS 2-2 in a shielded metal housing, miniature and rotary sensors, including types for bores from Ø 0.8 mm. Array sensors work through the MiniMux multiplexer with 64 channels, accepting up to 62 elements plus two reference elements.
State the sensor designation and the instrument model
Coils for wire, bar and tube inspection: feed-through coils with differential and absolute windings or differential only, encircling objects from 2 to 180 mm in diameter. Sorting coils are available up to 270 mm in diameter; for ferromagnetic materials the company supplies magnetising and demagnetising yokes with convection cooling.
State the object diameter and material
Reference specimens for setting up and checking the measuring chain: aluminium, titanium, steel and austenitic TP 9–TP 12 with notches from 0.1 × 0.2 mm, the four-layer TP 1, the TP 31–TP 34 set and the TP200 specimen with reference holes for nine rotary sensors. The specimens come with a certificate or protocol.
State the specimen designation and the setup task
Software for recording and evaluating eddy current data: ELOIMAGE for C-scans, the ELOIPM image processing module as an extension of SCANALYZER IS, support for the DICONDE format for exchanging results, and an OPC UA interface for linking to process control systems.
State what is needed: recording, evaluation or data exchange
The method is a surface one: it measures the change in coil impedance. The standard depth of penetration δ is the drop of eddy currents to about 37 %: 36.8 % remains at 1δ, 5.1 % at 3δ and 0.7 % at 5δ. The manufacturer calls 3δ the effective depth — defects deeper than that are not reliably detected, and a wall thicker than 5δ counts as thick-walled.
State the material and the required inspection depth
Four industries structure the product range. Aerospace covers engine blades and wheel rims, automotive covers bar stock, turbine wheels, cracks and grinding burn, energy and steel covers long products, longitudinal weld seams of pipes and local hardening of plate, and rail covers rail defects and switch points.
State the industry and the inspection object
The manufacturer declares its own calibration loop: calibration to national and international standards and automatic calibration against reference specimens directly in the line. ET 1 and ET 2 training takes place at the Frankenthal site. Sales run through 29 partner organisations in 36 countries; there is no service partner in Russia, Belarus or Kazakhstan.
State what is needed: calibration, training or supply
State the object and material, the diameter or thickness, the required inspection depth, the surface condition and the line speed. For bar and wire the diameter and the required sensitivity matter, for tubes the longitudinal weld seams, for rail the defect type and the working speed, and for replaceable parts the instrument model and the sensor designation.
The main replaceable parts are sensors, coils, rotating rotors and reference specimens. Sensors: absolute KAS-31 and PLA-33, differential KDS 2-2, miniature and rotary types, arrays through the 64-channel MiniMux multiplexer. Coils: feed-through and segment types for 2–180 mm diameters, sorting coils up to 270 mm. Specimens: TP 9–TP 12, TP 1, TP 31–TP 34, TP200. The manufacturer does not publish article numbers.
State what is required: an instrument matched to the object, a replacement sensor or coil, reference specimens for setting up, calibration and training. Add the material, the dimensions and the destination city. We will state what the manufacturer's documentation confirms and what needs separate checking.
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