What Keller does

Keller is a privately held Swiss industrial measurement instrumentation manufacturer headquartered in Winterthur, Switzerland, founded in 1974. The firm designs and produces precision pressure and level measurement devices, including pressure transmitters, pressure transducers, level probes, digital pressure gauges, and data loggers. These products serve industrial customers requiring accurate, reliable measurement of pressure and fluid level in process and equipment applications.

The company operates a narrow, technically specialized product portfolio focused on core pressure and level sensing, with an established multi-country footprint covering the United States, Germany, and Canada. Distribution is supported through regional web presences, including the dedicated US site (us.keller-pressure.com), indicating a cross-Atlantic go-to-market that serves industrial customers in both European and North American markets. The firm employs between 251 and 500 people and remains under family ownership, with Tobias Keller serving as CEO and owner, and Hannes W. Keller listed as founder.

Keller's business model is built on the manufacture and sale of physical measurement instruments rather than software or subscription services. Pricing is not publicly disclosed and no explicit revenue mechanics, distribution partnerships, or customer segment data are available in the source material. The company's value proposition centers on precision measurement hardware for industrial pressure and level applications, supported by five decades of operating history and accumulated technical know-how in its niche.

Name

Keller

Legal name

Keller

Website

https://keller-druck.com

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

251–500 employees

Short description

Keller is a privately held Swiss industrial manufacturer founded in 1974 that designs and produces pressure transmitters, transducers, level probes, digital pressure gauges, and data loggers for industrial measurement applications across North America and Europe.

Ownership category

akta.pro rank

Product category

Industrial Pressure and Level Measurement Instrumentation

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Measuring & Controlling Devices, Nec (3829)

akta.pro primary industry

Industrial Sensors (Pressure, Temperature, Flow, Level, Proximity, Vibration) (IMAGAFAA)

akta.pro secondary industries

Pressure & Force Sensors (Pressure/Strain/Load Cells) (HDAHALAB), Sensors & Feedback Devices (Pressure, Flow, Position, Encoders, Transducers) (IMAHAGAK)

Keywords

• Pressure measurement instrumentation
• Level measurement sensors
• Pressure transmitters transducers
• Digital pressure gauges
• Industrial data loggers

Headquarters

HQ city

Winterthur

HQ country

Switzerland

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Core offering

Keller manufactures and supplies precision level and pressure measurement instrumentation for industrial applications. Its product portfolio includes pressure transmitters and transducers, level probes, digital pressure gauges, and data loggers used to monitor and record pressure and level in industrial processes.

Product overview

Keller offers a focused portfolio of level and pressure measurement instrumentation. The company's core product line centers on precision pressure sensors and measurement solutions for industrial applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Pressure Transmitters and Transducers Precision devices that convert pressure measurements into standardized output signals for monitoring and control in industrial process applications. Sold to industrial customers needing pressure sensing solutions.
• Level Probes Submersible level measurement probes used to determine the level of liquids in industrial tanks, wells, and reservoirs. Intended for industrial process and water/wastewater applications.
• Digital Pressure Gauges Standalone digital instruments that display and measure pressure readings for industrial users requiring on-site or portable pressure indication.
• Data Loggers Electronic devices that record pressure and level measurement data over time, used by industrial customers for process monitoring, quality assurance, and compliance documentation.

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Recent moves3 records

Expansion highlights1 record

Broad incumbents

• ABB: Global industrial automation major offering pressure, level, and flow instrumentation as part of a broad measurement and analytics portfolio, competing with Keller in process industry tenders.
• Honeywell Process Solutions: Major process automation provider whose pressure and level instrumentation competes with Keller for plant-wide supplier positions across oil & gas, refining, and chemical end markets.
• Siemens (Process Instrumentation): Industrial conglomerate with a SITRANS/Siemens instrumentation line covering pressure, level, and flow sensors; competes with Keller for plant-wide supply contracts in process and discrete manufacturing.
• Yokogawa Electric: Japanese process automation and instrumentation provider with a pressure and differential-pressure transmitter portfolio serving the same plant-floor customers as Keller, especially in oil & gas and chemicals.
• Emerson Electric (Rosemount): Large diversified industrial conglomerate whose Rosemount line directly competes in pressure and level measurement for process plants; competes with Keller for OEM and end-user specifications in oil & gas, chemical, and power.

Direct peers

• WIKA: German-based manufacturer of measurement instruments (pressure, temperature, level, force) with a virtually identical product mix and industrial customer base to Keller, making it the closest comparable specialty rival.
• VEGA Grieshaber: German privately-held specialist in level and pressure measurement, with overlapping core products and industrial customers; a focused mid-sized rival highly comparable to Keller on niche specialization.
• Endress+Hauser: Global leader in industrial process measurement instrumentation, offering pressure, level, flow, and analytical sensors across the same process-industry customer set as Keller, with overlapping products in pressure transmitters and level probes.
• KROHNE: German-based process instrumentation specialist with pressure, level, and flow offerings that overlap with Keller, especially in water/wastewater and chemical processing customers.
• BD|Sensors: European specialty pressure-measurement manufacturer with a product line and customer profile near-identical to Keller, serving OEM and process-industry buyers with pressure transmitters, transducers, and electronic pressure switches.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat2 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Keller