Pyrometer Instrument

What Pyrometer Instrument does

Keller HCW GmbH, doing business as Keller Pyrometer Systems and referred to in the United States as Pyrometer Instrument, manufactures industrial infrared pyrometers for non-contact optical temperature measurement. Founded in 1928 and headquartered in Ibbenbüren-Laggenbeck, Germany, the company operates as a division of the Keller industrial conglomerate and sells through a direct enterprise field-sales model. Its six pyrometer series (CellaTemp PX, PA, PK/PKF/PKL, PR, PT, and Mikro) cover a measurement range from -30°C to 3,500°C and are complemented by fiber optic pyrometers, complete measuring systems, accessories, and mounting combinations. The technical foundation rests on proprietary optical designs combined with modern sensor technology and digital interfaces, including IO-Link (IEC 61131-9) on the PK and PX families, the CellaView configuration and visualization software, and the KITS Service App available in 22 languages on iOS, Android, and web. Customers are industrial enterprises in steel, aluminum, glass, semiconductor manufacturing (including MBE, PLD, RTP, SiC, and artificial diamond processes), foundries, building materials and cement, energy and combustion, and research institutions.

The business model is anchored on custom-quoted hardware sales of pyrometers and measurement systems, supplemented by professional services including installation, commissioning, supervision, repair, and technical consultation, plus pricing for the KITS App and CellaView software stack. No public pricing is disclosed; applications are matched through online inquiry forms, a product finder, measuring-field and emissivity calculators, and direct application-engineering engagement. The company maintains a multi-language web presence (14+ languages), runs vertical-specific content marketing through technical publications and an industry glossary, and participates in industry trade shows across Europe and Asia-Pacific, with scheduled appearances through 2026 in Germany, China, India, Japan, and Sweden. Ownership is private (German GmbH structure) under the Keller parent conglomerate, with no public listing, no disclosed funding rounds, and no public investor disclosures. Management team, executive leadership changes, regulatory actions, mergers, acquisitions, and restructuring events are not disclosed in the available source material.

Name

Pyrometer Instrument

Legal name

Keller HCW GmbH

Website

https://pyrometer.com

Company type

Private

Founded year

1928

Operating status

Operating

Headcount range

1–10 employees

Short description

Keller HCW GmbH, doing business as Keller Pyrometer Systems (Pyrometer Instrument in the US), manufactures industrial infrared pyrometers for non-contact optical temperature measurement from -30°C to 3,500°C, serving steel, aluminum, glass, semiconductor, foundry, cement, energy, and research customers via direct enterprise sales worldwide.

Ownership category

akta.pro rank

Product category

Industrial Temperature Measurement Instruments

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Optical Instruments & Lenses (3827)

akta.pro primary industry

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

Keywords

• Infrared temperature measurement
• Industrial pyrometers
• Non-contact thermometry
• Optical temperature sensors
• Process temperature monitoring

Headquarters

HQ city

Windsor

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Pyrometer Equipment Sales: Sale of precision optical temperature measurement devices including pyrometers, measuring systems, accessories, and mounting combinations for industrial applications.
2. Professional Services (Installation, Commissioning, Maintenance): Construction and assembly services including on-site installation, commissioning, supervision, and repair services. Priced according to time-based rates or project-based fees.
3. Technical Consultation and Application Engineering: Expert consultation for selecting appropriate measurement solutions for specific industrial applications, including Industrial Solution Guide services.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

Pyrometer Instrument (operating as Keller Pyrometer Systems under Keller HCW GmbH) designs, manufactures, and sells non-contact infrared pyrometers for industrial temperature measurement applications. The product portfolio covers six pyrometer series (PX, PA, PK, PR, PT, Mikro) with measurement ranges from -30°C to 3,500°C, complemented by integrated measuring systems, configuration software (CellaView), and professional installation, commissioning, and consultation services for industrial process control across steel, aluminum, glass, semiconductor, foundry, cement, and energy sectors.

Product overview

Keller HCW GmbH (Keller Pyrometer Systems) offers a comprehensive portfolio of non-contact infrared temperature measurement products for industrial applications. The core offering consists of six pyrometer series (Serie PX, PA, PK, PR, PT, and Mikro) covering a temperature measurement range from -30°C to 3,500°C, complemented by complete measuring systems, accessories, and mounting combinations. The product lineup is supported by software tools (CellaView, IO-Link Communication Tool) and the KITS Service-App — a digital service platform providing product information, calculators (measuring field, emissivity), troubleshooting guides, and ticket management. The company also provides online calculation tools (Messfeld-Kalkulator, Emissionsgrad-Kalkulator, Fehlerbehebung) accessible via web and mobile app. Key product series include IO-Link-enabled models (CellaTemp PK/PKF/PKL and PX series) supporting Industry 4.0 integration. Applications span steel, glass, aluminum, semiconductor manufacturing, foundries, induction heating, cement, and combustion plants.

Differentiator

Problem solved

Functional benefit

Brands

• Keller Pyrometer Systems: Brand name for the pyrometer and optical temperature measurement product line under Keller HCW GmbH

Products and services

• CellaTemp PX Pyrometer Series Pyrometer series with IO-Link communication interface (IEC 61131-9), designed for precision optical temperature measurement in industrial applications. Provides Industry 4.0 connectivity with automatic parameterization and plug-and-play device replacement.
• CellaTemp PA Pyrometer Series Pyrometer series for industrial temperature measurement applications, designed for specific temperature ranges with excellent optical properties.
• CellaTemp PK/PKF/PKL Stationary Pyrometer Series Stationary pyrometer series with IO-Link support, suitable for continuous industrial temperature monitoring and control. Supports digital point-to-point communication, automatic parameterization, and predictive maintenance.
• CellaTemp PR Pyrometer Series Pyrometer series for industrial temperature measurement applications with specialized optics for specific industrial requirements.
• CellaTemp PT Pyrometer Series Pyrometer series for industrial temperature measurement applications, designed for specific industrial requirements.
• CellaTemp Mikro Pyrometer Series Compact pyrometer series designed for applications requiring small measurement fields and precise temperature readings, with compact form factor suited to confined installation spaces.
• Messsysteme (Measuring Systems) Complete measurement systems integrating pyrometers with necessary components (including cooling armatures and fiber optic elements) for specific industrial measurement applications in harsh environments.
• CellaView Software Software solution for pyrometer configuration, data visualization, and temperature/process monitoring for industrial applications.
• Installation, Commissioning, and Maintenance Services Professional on-site services including installation, commissioning, supervision, and repair services for pyrometer systems. Priced according to time-based rates or project-based fees.
• Technical Consultation and Application Engineering Expert consultation services for selecting appropriate pyrometer measurement solutions for specific industrial applications, including application-specific engineering and Industrial Solution Guide services.

Segments7 records

Ideal customer profiles7 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Keyence Corporation: Global Japanese manufacturer of industrial sensors including laser displacement, proximity, and infrared temperature sensors. Competes with Keller in industrial process sensing through a broad, direct-sales-led portfolio and a much larger balance sheet.
• Advanced Energy (LumaSense / Impac): Advanced Energy acquired LumaSense and Impac Infrared, offering a broad portfolio of optical pyrometers, thermal imagers, and gas-detection instruments for industrial and semiconductor customers. Highly comparable product overlap with Keller, with a much larger corporate parent providing broader portfolio leverage.
• Excelitas Technologies (formerly Qioptiq / Linos): Excelitas offers optical sensing, infrared detection, and pyrometer sub-systems for industrial, scientific, and defense applications. Comparable at the level of optical infrared measurement technology, with a broader photonics portfolio than Keller.
• AMETEK Land Instruments: AMETEK's Land division supplies non-contact infrared pyrometers, thermal imagers, and combustion monitoring instruments to steel, glass, cement, and power customers. Closely comparable to Keller in industrial process temperature measurement, with the backing of a large industrial conglomerate.
• Fluke Process Instruments (Raytek): Fluke's process-instruments business, built on the legacy Raytek pyrometer line, provides fixed and portable infrared temperature sensors for industrial maintenance, manufacturing, and process control. Direct product overlap with Keller, with a much larger commercial and service infrastructure.
• Siemens Industry (Process Instrumentation): Siemens' process instrumentation portfolio, including SITRANS temperature sensors and integrated automation, competes with Keller in metals, glass, cement, and power plants. As a broad automation incumbent, Siemens can bundle temperature instrumentation with PLCs, drives, and digital-industry software that Keller cannot match.

Direct peers

• Calex Electronics: UK manufacturer of non-contact infrared temperature sensors and pyrometers for industrial OEM and process applications. Direct overlap with Keller in fixed pyrometers, short-wavelength devices, and industrial OEM integration use cases.
• Optris GmbH: Germany-based specialist manufacturer of infrared pyrometers and thermal imaging cameras for industrial non-contact temperature measurement. Direct overlap with Keller in product range (fixed pyrometers, portable devices), European industrial customer base, and Industry 4.0 / IIoT integration messaging.
• Thermoteknix: UK-based specialist in infrared thermal imaging and non-contact temperature measurement for industrial and defense applications. Comparable niche specialization and pyrometer / thermal-camera portfolio, competing for similar glass, metals, and process-industry customers.

Others

• Heitronics (Keller Group sibling / process radiation thermometers): Heitronics, part of the same Keller corporate group, produces radiation thermometers and blackbody calibration sources for industrial and laboratory use. Sister-company adjacency creates both an internal competitor and a potential cross-sell relationship relative to Keller Pyrometer Systems.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/pyrometer-instrument-co-inc

Revenue estimate

Valuation estimate

Number of profiles

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 Pyrometer Instrument