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KALTHOFF – Fertigung

Manufacturer of rubber and solid rubber connectors, cable assembly and mobile MID electricity meters

KALTHOFF Logo

KALTHOFF GmbH

Schalksmühle (Headquarters)New on Amplifa

1931Founded
GmbHLegal form
Schalksmühle, North Rhine-WestphaliaLocation

About KALTHOFF

KALTHOFF GmbH is an electrical engineering company based in Schalksmühle in North Rhine-Westphalia, operating as a manufacturer of solid rubber connectors and cable connection solutions – according to its own information since 1931 under the motto "Connectors and Cabling Solutions". The portfolio includes the company's own ERSO brand with rubber and solid rubber connectors, distribution boxes, luminaires, signal devices as well as alternative products to Merten connectors. In addition, KALTHOFF supplies calibrated mobile MID and MID load-profile electricity meters in accordance with PTB-A 50.7 with data logger and data export via TCP/IP, Modbus, M-Bus, RS485 or web browser/CSV. In the field of cabling and transmission, the company offers custom cable assembly (cable types, cross-sections, colors, lengths, printing, heat-shrink tubing, labeling), hotmelt applications and cable transitions. Customer groups include industry, service providers, building renovators, construction drying, marinas, camping, e-mobility and shipbuilding.

Site
Schalksmühle
Processes
Cable assembly (custom assembly: connectors, cable types, cross-sections, colors, lengths,, Hotmelt applications (cable/plug connections), Manufacture of rubber and solid rubber connectors, Cable transitions and plug connections, Recalibration of electricity meters (service, testing/repair of mobile meters), Custom cable assembly (cable types, cross-sections, colors, lengths, printing), Hotmelt applications, Cable transitions
Materials
Solid rubber, Rubber, Polyamide, Polycarbonate, Thermoplastic, PUR cable, Rubber cable, Steel (stiffening rings)
Founded
1931
Industries
Industry, Service providers, Building renovators, Construction drying, Marinas, Camping
  1. 01

    Cable assembly (connectors, cable types, cross-sections, colors, lengths,

  2. 02

    Hotmelt applications

  3. 03

    Cable transitions and plug connections

  4. 04

    Manufacture of rubber and solid rubber connectors

  5. 05

    Assembly of measuring and metering systems

  6. 06

    Recalibration and repair of mobile MID electricity meters

Materials

VG

Solid rubber

Robust housing material for connectors and mobile electricity meters, splash-proof up to IP44.

G

Rubber

Material for rubber plugs, couplings and flexible cable connections.

PA

Polyamide (PA)

Plastic for flush-mounted and surface-mounted socket outlets with earthing contact.

PC

Polycarbonate (PC)

Shatter-resistant material for connectors and housing parts.

TP

Thermoplastic

Strain-relief blocks and housings, e.g. shatter-resistant StromzählerBox electricity meter box.

PUR

PUR cable (H07BQ-F)

Cable type for custom assemblies, among other things in orange for mobile meters.

H07RN-F

Rubber cable (H07RN-F)

Standard cable type for mobile MID electricity meters and assemblies.

ST

Steel (stiffening rings)

Stiffening rings in the sheath of heavy solid rubber industrial couplings.

Locations

Standort Schalksmühle

Schalksmühle

DE

Headquarters, assembly and production of connectors and metering systems

Materials
Rubber, solid rubber, thermoplastic, polyamide, polycarbonate, PUR

Products and Components

Mains plug
Mains plugRubber/solid rubber · Electrical engineering
Device connection cable
Device connection cableCable assembly · Electrical engineering
CEE device plug
CEE device plugConnector · Industry
Extension cable
Extension cableAssembly · Construction/Industry
CEE extension cable
CEE extension cableAssembly · Industry
Adapter
AdapterPlug connection · Electrical engineering
In-line switch
In-line switchSwitching parameters · Construction/Industry
Electricity meter
Electricity meterMeasuring device · Electrical engineering
Test cables
Test cablesTest equipment · Electrical engineering
Illu string of lights
Illu string of lightsIllumination · Event/Construction
Illu plug
Illu plugConnector · Illumination
ProtectorONE
ProtectorONEProtective device · Electrical engineering

Inside the production

KALTHOFF / ERSO product portfolio 2026
KALTHOFF / ERSO product portfolio 2026
light + building 2026, Frankfurt/Main
light + building 2026, Frankfurt/Main
Merten – KALTHOFF – ERSO product overview
Merten – KALTHOFF – ERSO product overview
Material illustration
Material illustration

Industries

IndustryService providersBuilding renovatorsConstruction dryingMarinasCampingE-mobilityShipbuildingConstruction

Processes & technical limits

ProcessesToleranceMax. partWeightLot sizeMaterials
Cable assembly (custom assembly: connectors, cable types, cross-sections, colors, lengths,Assembly––––Rubber, PUR, Thermoplastic
Hotmelt applications (cable/plug connections)Joining––––Rubber, Thermoplastic
Manufacture of rubber and solid rubber connectorsPlastics––––Rubber, Solid rubber, Thermoplastic, Steel (stiffening rings)
Cable transitions and plug connectionsJoining––––Rubber, Copper (cable cores)
Recalibration of electricity meters (service, testing/repair of mobile meters)Testing–––––

Additional services

Custom cable assembly (cable types, cross-sections, colors, lengths, printing)Hotmelt applicationsCable transitionsRecalibration and repair of mobile MID electricity metersData logger/load-profile solutions with data export (TCP/IP, Modbus, M-Bus, RS485, web browser/CSV)

History

  1. 1931

    Year of foundation according to company information "Connectors and Cabling Solutions – since 1931"

  2. 2026

    Announced participation in the light + building trade fair (08–14.03.2026, Frankfurt/Main)

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