What Calex Electronics does

Calex Electronics Limited is a privately held UK manufacturer founded in 1972 and headquartered in Leighton Buzzard, specializing exclusively in non-contact infrared temperature measurement technology for industrial customers. The company designs, manufactures, and sells pyrometers, fixed-mount infrared temperature sensors, handheld infrared thermometers, temperature indicators and controllers (Pixsys ATR series), data loggers (including the Excelog One), wireless telemetry systems (PyroNet GSM/Z), and blackbody calibration sources, serving end-markets in food manufacturing, iron and steel, glass, asphalt, paper, automotive, plastics, and power distribution.

Its underlying technology is infrared pyrometry with proprietary optics, supporting temperature ranges from -20°C to 3000°C, sub-millimeter spot sizes (down to 0.7 mm on the PyroCube XSA, under 1 mm on the FibreCube), and response times as fast as 10 ms. Output options include 4-20 mA, RS-232, RS-485 Modbus RTU, USB, thermocouple, and voltage, with smartphone NFC configuration available on the PyroNFC line. The ExTempMini carries ATEX, IECEx, JapanEx, and UKCA Zone 0 hazardous-area certifications, and the company maintains ISO 9001:2015 quality certification.

Calex operates a contact-sales model with no public pricing, selling primarily through direct technical engagement and a worldwide distributor network. It employs 11-50 people, serves customers globally, and has no disclosed funding, parent company, M&A activity, or publicly reported revenue.

Name

Calex Electronics

Legal name

Calex Electronics Limited

Website

https://calex.co.uk

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

11–50 employees

Short description

Calex Electronics is a privately held UK manufacturer (founded 1972, Leighton Buzzard) that designs and sells non-contact infrared temperature sensors, pyrometers, controllers, data loggers, and calibration sources for industrial customers across food, steel, glass, automotive, plastics, and power distribution sectors.

Ownership category

akta.pro rank

Product category

Industrial Temperature Measurement Instrumentation

NAICS

Other Measuring and Controlling Device Manufacturing (334519), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Analytical Laboratory Instrument Manufacturing (334516)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Laboratory Analytical Instruments (3826)

akta.pro primary industry

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

akta.pro secondary industry

Thermometers & Temperature Monitoring (Smart Thermometers) (CRACAQAG)

Keywords

• Infrared temperature sensors
• Non-contact pyrometers
• Industrial temperature measurement
• Process instrumentation
• Blackbody calibration sources

Headquarters

HQ city

Leighton Buzzard

HQ country

United Kingdom

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Distribution channels2 records

Marketing channels3 records

Core offering

Calex Electronics manufactures and sells non-contact infrared temperature sensors (pyrometers), handheld infrared thermometers, temperature indicators and controllers, data loggers, and blackbody calibration sources. Their products serve industrial process applications across food, iron & steel, glass, asphalt, paper, automotive, plastics, and power distribution sectors, including intrinsically safe sensors certified for hazardous areas (ATEX, IECEx, UKCA, JapanEx).

Product overview

Calex Electronics is a specialist manufacturer of pyrometers and non-contact infrared temperature sensors, instrumentation, and data loggers for industrial applications. The product portfolio is organized around core temperature measurement categories: fixed-mount infrared temperature sensors (including PyroMiniBus, PyroUSB, PyroCube XS, PyroEpsilon, PyroCouple, PyroMini OEM, PyroNFC, PyroSigma, FibreCube, PyroCube G, and ExTempMini), handheld infrared thermometers (ST633), temperature indicators and controllers (Pixsys ATR series), temperature measurement systems, blackbody calibration sources, and data loggers (including Excelog One). The offerings span from basic low-cost pyrometers for machine manufacturers to advanced intrinsically-safe sensors certified for hazardous areas (ATEX/IECEx), precision instruments for measuring sub-millimeter targets, and complete networked monitoring systems with touch screen interfaces. The company also offers wireless telemetry products (PyroNet GSM/Z) for remote monitoring via cellular networks.

Differentiator

Problem solved

Functional benefit

Products and services

• PyroMiniBus Miniature pyrometer with RS-485 Modbus RTU communication for multi-channel industrial temperature monitoring and logging systems.
• PyroUSB Advanced pyrometer with 4-20 mA output and USB configuration interface for temperature measurement in industrial environments.
• PyroCube XS (XSA & XSB) Precision infrared pyrometer with tightly focused optics for measuring extremely small targets down to 0.7 mm spot size, with response times as fast as 10 ms.
• PyroEpsilon Fixed infrared temperature sensor with continuously adjustable emissivity via 4-20 mA input, temperature range -20°C to 500°C with 2-wire 4-20 mA output.
• PyroCouple Simple, robust pyrometer with analogue output (4-20 mA, mV, or thermocouple) for basic temperature measurement applications.
• PyroMini OEM Low-cost miniature pyrometer designed for machine manufacturers, featuring 4-20 mA, thermocouple, or voltage output options.
• PyroNFC Smartphone-configurable pyrometer with NFC technology for configuration and voltage or thermocouple output, includes iOS app for setup.
• PyroSigma Miniature pyrometer with built-in display for local temperature reading, with voltage output and alarm functionality.
• FibreCube High-performance fibre optic pyrometer for metals, harsh environments, and high ambient temperatures, featuring very small measured spot size under 1 mm.
• PyroCube G Specialized pyrometer for measuring glass surface temperature with optimised spectral response for glass applications.
• ExTempMini Intrinsically safe infrared temperature sensor with ATEX, IECEx, UKEX and JapanEx certification for hazardous areas, temperature range -20°C to 1000°C with ambient resistance up to 180°C.
• Handheld Infrared Thermometers (ST633) Portable handheld IR thermometers for spot temperature measurement in various industrial applications, with adjustable emissivity and optional Type K thermocouple input.
• Pixsys ATR244 DIN Rail Controller Multi-function DIN rail indicating controller with PID control, alarm outputs, and RS485 Modbus communication.
• Pixsys ATR124 Panel Controller 3-digit panel-mounted indicating controller with NFC configuration capability and dual setpoint functionality.
• PyroMiniBus Temperature Measurement Systems Complete temperature monitoring and logging systems integrating multiple RS-485 Modbus sensors with junction boxes and touch screen display modules.
• Blackbody Calibration Sources Reference blackbody calibration sources for verifying and calibrating non-contact thermometers and pyrometers.
• Excelog One Data Logger Miniature handheld thermocouple data logger and simulator that can measure temperature or simulate thermocouple voltage output for calibration purposes.
• PyroNet GSM Remote Telemetry System Remote sensor telemetry system using GSM/cell phone network for transmitting temperature data to a hosted web interface, supports up to 4 sensor inputs.
• PyroNet Z Wireless Temperature System Wireless temperature measurement system for remote monitoring applications using wireless communication protocols.

Quantifiable outcome

• Temperature measurement accuracy: ±1°C or 1% of reading (ExTempMini)
• +2 more outcomes

Segments8 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Recent moves4 records

Expansion highlights5 records

Direct peers

• Micro-Epsilon: German precision sensor manufacturer with a flagship infrared temperature/pyrometer product line alongside displacement, color and thickness sensors. Competes head-to-head with Calex in industrial IR thermometry (PyroCube-class precision), particularly in metal, glass and semiconductor process markets.
• Thermoteknix Systems Ltd: UK-based thermal imaging and infrared temperature measurement specialist serving industrial, defence and medical markets. Overlaps directly with Calex's IR thermometry portfolio and shares UK manufacturing heritage and applications breadth.
• Sensortherm GmbH: Specialist German pyrometer manufacturer focused exclusively on non-contact temperature measurement for industrial process applications. Closely comparable to Calex in vertical integration, pyrometer-only specialisation and target end-markets.
• Optris GmbH: Berlin-based specialist manufacturer of non-contact infrared temperature sensors and thermal imaging cameras for industrial applications. Direct competitor to Calex across fixed-mount pyrometers, OEM sensors, and handheld IR thermometers; highly comparable pure-play specialist with overlapping target verticals (plastics, metal, glass, automotive).
• AMETEK Land Instruments International: UK-headquartered (Dronfield) industrial infrared thermometry and combustion instrumentation manufacturer. Directly competes with Calex in fixed and portable pyrometers for steel, glass, cement and power-generation applications, and is geographically the closest UK rival.
• Fluke Process Instruments (formerly Raytek): Division of Fluke (Fortive) supplying industrial infrared thermometers, line scanners and thermal-imaging systems. Competes with Calex's fixed-mount and handheld pyrometers across the same industrial OEMs and process plants.
• Heitronics (Klasmeier-Leptonik group): Specialist infrared pyrometer manufacturer with a heritage analogous to Calex, focusing on industrial non-contact temperature measurement for process and research applications. Comparable in product scope (fixed pyrometers, OEM modules, special calibrations) and European industrial end-markets.

Regional players

• Keller-Leuze: German industrial temperature and pressure instrumentation manufacturer serving DACH-region process industry. Offers pyrometers and temperature controllers analogous to Calex's Pixsys/pC-series products, and competes via similar European OEM channels.

Broad incumbents

• Omega Engineering (Spectris / Dwyer acquired): Massive catalogue distributor and manufacturer of industrial sensors, including an extensive IR thermometer/pyrometer range. Competes with Calex on breadth and pricing, but lacks Calex's specialist narrow focus on temperature measurement only.
• LumaSense Technologies (Advanced Energy): Industrial temperature and gas-sensing business within Advanced Energy (acquired LumaSense). Provides IR thermometers, blackbody calibration sources and fibre-optic pyrometers overlapping with Calex's PyroCube/FibreCube/BB-series, but as part of a much broader power-conversion and sensing portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/Calex_Infrared
• LinkedInlinkedin.com/company/calex-electronics-limited

Compliance3 records

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 Calex Electronics