What EP Ehrler Pruftechnik Engineering does

EP Ehrler Prüftechnik Engineering GmbH is a German precision engineering firm founded in 1983 and headquartered in Niederstetten, Germany, that designs and manufactures custom high-precision flow measurement technology, test benches, and calibration systems. The company serves internationally active corporations and mid-sized companies across automotive, HVAC-R, aviation, pharmaceutical, fluid/valve, and hydrogen/fuel cell verticals, with named enterprise customers including Stiebel Eltron. Its portfolio spans proprietary calibration standards using critical Laval nozzles (SMF SonicMasterFlow) and laminar flow elements (LMF LaminarMasterFlow), closed-loop test bench designs for heat pumps (HPT), leak/burst pressure testing, gas meter calibration (HPPP480, BP Bell Prover), and Real Gas Loop systems for hydrogen and combustible gases achieving measurement uncertainty as low as 0.06%-0.2%.

The company operates one of Germany's most accurate DAkkS-accredited calibration laboratories (accredited under DIN EN ISO/IEC 17025:2018) and is a formal technology partner of PTB, Germany's national metrology institute, supporting traceability to national standards. Software and IIoT offerings (LabVIEW, C#, Wonderware, OPC UA, Modbus, Profibus, SAP integration) layer machine monitoring, database connectivity, and remote maintenance on top of the installed hardware base. Internationally, EP extended operations with a calibration laboratory in Hangzhou, China in 2020.

EP generates revenue through one-time custom test bench sales, recurring calibration services (accredited and non-accredited, in-lab and on-site), service and maintenance contracts, and professional services including project management, CE certification, and flow measurement training. Pricing is project-based and not publicly disclosed. The company is privately held as a subsidiary of Dr. Födisch Umweltmesstechnik AG within the Födisch Gruppe since 2018, led by three managing directors (Fabian Wagner, Thomas Kappes, and Dietmar J. Engelbrecht), with an estimated 51-100 employees.

Name

EP Ehrler Pruftechnik Engineering

Legal name

EP Ehrler Prüftechnik Engineering GmbH

Website

https://ep-e.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

51–100 employees

Short description

EP Ehrler Prüftechnik Engineering GmbH is a German precision engineering firm (est. 1983) that designs custom high-precision flow measurement test benches and DAkkS-accredited calibration systems, serving automotive, HVAC-R, hydrogen, and industrial enterprise customers across Europe and Asia.

Ownership category

akta.pro rank

Product category

Industrial Flow Measurement Test Equipment

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Totalizing Fluid Meter and Counting Device Manufacturing (334514), Testing Laboratories and Services (541380), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Services-Testing Laboratories (8734), Totalizing Fluid Meters & Counting Devices (3824), Laboratory Analytical Instruments (3826)

akta.pro primary industry

Test & Measurement Equipment (Oscilloscopes, DAQ, signal analyzers, calibration benches) (IMAGAFAC)

akta.pro secondary industries

Calibration Services & Standards (Calibration labs, reference standards, traceability services) (IMAGAFAH), Metrology, Calibration & Testing Equipment (Balances, pH/DO, Standards) (HLAGAIAL), Metering Equipment Testing, Calibration & Certification (EUAJAKAA)

Keywords

• Flow measurement technology
• Test bench manufacturing
• Calibration laboratory services
• Heat pump testing
• Hydrogen measurement systems

Headquarters

HQ city

Niederstetten

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Technology or R&D, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Custom Test Bench Manufacturing: Design and manufacture of custom test rigs and measurement systems tailored to customer requirements. Products include flow measurement systems, leak testing systems, burst pressure test benches, heat pump test benches, and calibration systems.
2. Calibration Services: DAkkS-accredited and non-accredited calibration services for flow, temperature, pressure, and humidity measurements. Includes both laboratory calibrations and on-site calibrations.
3. Software & IIoT Solutions: Custom software development, IIoT integration, machine monitoring, and remote maintenance services. Includes database connections and ERP system integrations.
4. Service & Maintenance Contracts: Ongoing service, calibration, and maintenance contracts tailored to individual projects including service-hotline, stand-by for service calls, and regular maintenance.
5. Flow Training & Education: Practical flow measurement and calibration training courses conducted by experts. Includes basic courses and advanced training on measurement uncertainty, leak testing, and calibration.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

EP Ehrler Prüftechnik Engineering designs, manufactures and services custom high-precision flow measurement test benches (heat pump, fan, leakage, burst pressure, temperature-aging) and national calibration transfer standards (SMF SonicMasterFlow, LMF LaminarMasterFlow, Real Gas Loop, HPPP480, BP Bell Prover), complemented by DAkkS-accredited calibration services, IIoT-enabled measurement software, gas sampling devices (GasPro), portable gas analysers (GA21 Plus), and flow-measurement training. Solutions are delivered to industrial customers in automotive, HVAC-R, aviation, pharma, hydrogen/fuel cell, and calibration laboratory markets.

Product overview

EP Ehrler Prüftechnik Engineering is a Komplettanbieter (complete provider) of high-precision flow measurement technology. The portfolio consists of custom-built test benches and measurement systems, modular calibration standards, software solutions with IIoT capabilities, and comprehensive services. Core products include SMF SonicMasterFlow (Laval nozzle calibration systems), LMF LaminarMasterFlow (laminar flow elements), Real Gas Loop (combustible gas calibration), HPPP480 and BP Bell Prover (primary calibration standards), and various test benches (Heat Pump, Fan, Leakage, Burst Pressure, Temperature-Aging). Software offerings include LabVIEW-based measurement systems, Machine Monitoring, and database/ERP integration modules. Services encompass DAkkS-accredited and non-accredited calibrations, project management, CE certification, remote maintenance, and flow measurement training. The company operates DAkkS-accredited calibration laboratories in Germany (Niederstetten) and China (Hangzhou), serving industries including automotive, HVAC-R, aviation, pharma, fluid technology, and hydrogen/fuel cells.

Differentiator

Problem solved

Functional benefit

Brands

• EP Instruments: Former subsidiary brand for Messtechnik & Kalibrierung, merged into EP Ehrler Prüftechnik Engineering GmbH in 2019
• TOP100

Products and services

• SMF SonicMasterFlow Calibration System High-precision flow calibration systems for air and gases using critically operated Laval nozzles in a modular drum design with automatic nozzle combination, covering flow ranges from 0.0025 to 10,000 m³/h with accuracy up to 0.15% MV (PTB). Sold to calibration laboratories and metrology institutes.
• LMF LaminarMasterFlow Measurement System Flow measurement systems using laminar flow elements (LFEs) delivering measurement accuracies up to 0.5% MV in flow ranges from 0.012 to 4,000 m³/h. Sold to industrial customers and calibration labs requiring precise gas flow measurement.
• Real Gas Loop Calibration System Closed-loop flow calibration system for technical and combustible gases including hydrogen and natural gas, flow range 0.1 to 250 m³/h, pressures up to 16 bar, and measurement uncertainty up to 0.2%. Sold to hydrogen and fuel cell industry customers and calibration labs.
• HPPP480 Calibration System for Gas Meters Primary standard calibration system for gas meters using natural gas with piston prover technology, supporting pressures up to 100 bar. Sold to gas meter manufacturers and utility calibration laboratories.
• BP Bell Prover Calibration Standard Primary standard for flow calibration with air based on PTB technology, providing measurement uncertainties up to 0.06% (k=2). Sold to national metrology institutes and accredited calibration laboratories.
• HPT Heat Pump Test Bench Closed-loop test bench for functional testing of air-to-water heat pumps according to DIN EN 14511 with temperature range -25 to +50 °C, suitable for use with low-GWP refrigerants (ATEX Zone 2). Sold to HVAC-R manufacturers (e.g. Stiebel Eltron) for product development and certification.
• Burst Pressure Test Bench Automated test systems for burst pressure testing of micro nozzles and micromechanical components up to 1000 bar. Sold to manufacturers of micro-fluidic components and micromechanical parts.
• High Pressure Leakage Test Bench Leakage testing systems for overpressure testing up to 100 bar for aerospace, automotive, and refrigeration components. Sold to manufacturers in aviation, automotive and HVAC-R sectors.
• Mobile Leakage Test Bench Low-flow rate mobile measurement system for vehicle tank systems meeting EPA 40 §1066.985 requirements. Sold to automotive OEMs and Tier-1 suppliers for emissions and tank integrity testing.
• Pressure & Leakage Test Bench Resistance and leakage testing systems using water as test medium up to 400 bar, designed for valve testing. Sold to valve and fluid technology manufacturers.
• BTB Fan Test Benches Test systems for measurement and characteristic curve determination of fans and blowers according to DIN EN ISO 5801 and AMCA 210, with flow ranges up to 100,000 m³/h. Sold to HVAC-R and industrial blower manufacturers.
• Temperature-Aging Test Bench Long-term endurance testing system for charge air coolers with temperatures up to 300 °C, capable of testing up to 6 items simultaneously. Sold to automotive and turbocharger component manufacturers.
• High Temperature Test Bench Temperature test bench for throttle valves using hot air up to 230 °C in a closed air circuit design. Sold to automotive component manufacturers for throttle and valve durability testing.
• Internal Pressure Cycle Test Bench (IDW) Endurance test bench for charge air coolers with pressure cycle testing, temperature range 30–200 °C, and test pressure up to 5 bar. Sold to automotive and turbocharger suppliers.
• Hydraulic Pressure-Temperature Cycling Test Bench Pulsation and burst test system for oil modules using hydraulic oil, pressure 0–40 bar, temperature -40 to +50 °C. Sold to automotive oil-module and hydraulic component manufacturers.
• WT10 Wind Tunnel Tempered wind tunnel for flow velocity measurements from 0.5 to 10 m/s at temperatures up to +105 °C with minimal turbulence. Sold to fluid technology and aerodynamic test laboratories.
• GMC Calibration Test Bench for Gas Meters Modular calibration system for domestic gas meters G1.6 to G400 with up to 24 simultaneous test positions. Sold to gas meter manufacturers and utility test departments.
• Test Benches for Heat Meters Adjustment and calibration systems for heat meters and calorimeters, with flow range 5–20,000 l/h and temperature range 7–85 °C. Sold to heat meter manufacturers and utility calibration facilities.
• Adjustment Test Bench for Room Sensors Calibration test bench for precise air flow settings used in adjustment of room sensors measuring temperature, humidity, and CO2 levels. Sold to building automation and HVAC sensor manufacturers.
• GasPro Mobile Gas Sampler Mobile cyclic gas sampler for determining gas quality in gas networks, PTB-approved for custody-transfer assessment. Sold to gas network operators and utilities.
• GA21 Plus Portable Gas Analyser Portable gas analyser with up to 8 electrochemical and NDIR sensors for gas measurements meeting EN 50379 and EN 50270 requirements. Sold to industrial and environmental compliance teams.
• Measuring Boxes MBI16 / MBI32 Modular signal acquisition systems for voltage, current, temperature, and digital signals with a Raspberry Pi-based controller. Sold to test labs and industrial research teams for custom measurement setups.
• Custom Measurement Software Solutions (LabVIEW, SPS, C-Sharp, Wonderware) Custom software solutions for measurement recording, data evaluation, and system control based on LabVIEW, C-Sharp and Wonderware, including machine monitoring, reporting, and database/ERP connectivity. Sold to industrial customers needing tailored automation and data acquisition for their test systems.
• DAkkS-Accredited Calibration Services DAkkS-accredited calibration services for volume flow (100 ml/h to 4,000 m³/h), mass flow rate (100 mg/h to 4,500 kg/h), absolute/relative/differential pressure, temperature (-35 to +175 °C), and humidity (10–90% rH). Sold to industrial customers, calibration laboratories, and national metrology institutes.
• Non-Accredited (Factory) Calibration Services Non-accredited factory and on-site calibration services for flow, temperature, pressure, and humidity measurements, complementing the DAkkS-accredited offering for customers that do not require formal accreditation. Sold to industrial customers and test labs.
• Service & Maintenance Contracts Ongoing calibration, service, and maintenance contracts including service hotline, standby for service calls, regular preventive maintenance, and spare parts availability. Sold under recurring subscription model to existing test bench customers.
• Technical Support & Remote Maintenance Remote access and direct error analysis services for installed EP test benches and measurement systems, plus ongoing technical support. Sold to existing customers as a recurring or per-incident service.
• Project Management & Test Bench Construction Services Comprehensive engineering project management services covering requirement specification, design, manufacturing, CE certification, and commissioning of test benches. Sold to industrial customers alongside custom test bench orders.
• Flow Measurement Training & Workshops Practical expert training programs (basic and advanced) on flow measurement technology, calibration methodologies, measurement uncertainty, and leak testing. Sold to engineers and technicians from industrial customers as paid workshops.

Quantifiable outcome

• Measurement uncertainty of 0.2% for Real Gas Loop calibration systems
• +4 more outcomes

Named customers1 record

Segments7 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration12 records

Feature5 records

Partnerships

One partnership is on record.

• Physikalisch-Technische Bundesanstalt (PTB)coreTechnology or IntegrationTechnology partner of PTB in Braunschweig, Germany's national metrology institute. EP's primary standards have been used successfully in various national metrological institutes worldwide. Technology partnership for realization and transfer of legal units for flow measurement.

Scale indicators4 records

Recent moves10 records

Expansion highlights6 records

Broad incumbents

• Itron: Major provider of gas, water, and electricity metering solutions with custody-transfer-grade accuracy and integrated AMI/AMR. Comparable in serving gas utility metering and calibration needs — adjacent to EP's GMC gas-meter calibration benches and GasPro custody-transfer sampler — but a far larger, publicly listed metering vendor.
• Elster Group (Honeywell): German-originated gas metering and regulation specialist now part of Honeywell, supplying gas meters, regulators, and pressure-control equipment globally. Overlaps with EP on high-precision gas flow calibration, gas meter test benches (EP's GMC, HPPP480), and serving gas utility customers.
• Siemens Industry (Process Instrumentation): Diversified industrial conglomerate whose Process Instrumentation division supplies flow, pressure, level, and temperature measurement plus digitalized calibration solutions. Comparable in serving European process-industry and HVAC customers with integrated measurement and IIoT/software offerings, but embedded within a vastly larger corporate portfolio.
• KROHNE Group: German-headquartered specialist in industrial process instrumentation with deep flow measurement expertise and in-house calibration facilities. Comparable product portfolio (flow meters, calibration systems) and overlapping customer base in oil & gas, chemical, and HVAC applications; larger and more globalized than EP.
• Endress+Hauser: Global leader in industrial process measurement, including flow, level, pressure, and temperature instrumentation, plus calibration services. Directly comparable as a broader incumbent offering overlapping flow-calibration and test/measurement capabilities to similar industrial customers, but at vastly greater scale and geographic reach than EP.
• Mettler-Toledo International: Global leader in precision laboratory and industrial instruments, including pipette calibration, balances, and process analytics. Comparable in delivering high-precision measurement to regulated industries (pharma, food, chemicals) and offering accredited calibration, but at much greater scale and with broader product breadth than EP.

Direct peers

• Transcat: US-listed provider of accredited calibration services and distribution of test and measurement instruments. Comparable as a calibration-services specialist serving regulated industries, though operating at greater scale and with a rental/instrument-distribution model EP does not pursue.
• Trescal Group: Global pure-play calibration services provider operating accredited labs across Europe, Americas, and Asia. Comparable in offering DAkkS-equivalent accredited flow, temperature, and pressure calibration to industrial customers, and a credible consolidator that could compete with or acquire EP's calibration business.
• Bronkhorst: Netherlands-based manufacturer of low-flow mass flow meters and controllers for gases and liquids, including thermal mass flow and Coriolis technologies, with dedicated calibration facilities. Most directly comparable to EP in scale and product specialization for precision gas flow calibration and OEM test systems.
• Mesa Laboratories: US-based provider of calibration, measurement, and monitoring instruments and services to regulated environments. Comparable as a specialty calibration-focused business serving life sciences, pharmaceutical, and industrial customers with recurring service revenue, and a plausible strategic acquirer for EP's calibration operations.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

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Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about EP Ehrler Pruftechnik Engineering