What Alphasense Ltd does

Alphasense Ltd is a UK-based designer and manufacturer of gas and particulate sensors, founded in 1996 and headquartered in purpose-built facilities in Great Notley, Braintree, Essex. The company is a wholly-owned subsidiary of AMETEK, a diversified US-listed industrial conglomerate, and operates commercially as part of AMETEK's electronic instruments portfolio, including a US webstore hosted under the AMETEK Mocon brand. The company sells primarily to industrial OEMs that build portable and fixed gas detection monitors, stack gas analysers, and environmental monitoring instruments, with secondary exposure to air quality and cleanroom monitoring applications.

The product portfolio spans electrochemical sensors (oxygen, carbon monoxide, hydrogen sulphide, NO/NO2, SO2, specialty toxics), photoionization detectors (PIDX-A series and legacy PID-A variants), NDIR carbon dioxide sensors, infrared methane/LEL sensors, optical particle counters (OPC-N3, OPC-R2), dual toxic sensors, and environmental sensors (temperature, RH, pressure), supported by a hardware accessory layer of Individual Sensor Boards, Analogue Front Ends, and 4-20mA transmitter boards. Differentiated technology includes the O2-A2-GLF lead-free oxygen sensor on a patent-pending leak-free platform, PIDX PID technology for ppb-level VOC detection, an Automated Test and Validation System (ATAV) that individually characterizes every unit, and patent-pending flow correction for OPCs in high-dust environments. The company holds ISO 9001:2015 certification and is RoHS, REACH, and WEEE compliant.

The business model is hardware sales to B2B industrial OEMs, executed through a sales-led motion combining direct field sales for enterprise and custom requirements, a UK webstore (store.alphasense.com), a US webstore (store.ametekmocon.com/alphasense), and participation in major industry trade shows (CIEPEC, Sensor+Test, AIHA Connect, Sensors Converge, AQE, SENSOR CHINA). Pricing is not publicly disclosed and requires account login; direct quotes are provided for custom and enterprise orders. Revenue figures are not publicly reported. Geographic reach is anchored in the UK and US with localization into China via Chinese-language documentation; the company is profiled by third-party market reports as a key player in the global electrochemical gas sensor, gas sensor, and hydrogen detection sensor markets.

Name

Alphasense Ltd

Legal name

Alphasense Ltd

Website

https://alphasense.com

Company type

Private

Founded year

1996

Operating status

Operating

Headcount range

11–50 employees

Short description

Alphasense Ltd designs and manufactures electrochemical, PID, NDIR, and optical particle counter sensors for industrial OEMs building gas detection monitors, stack gas analysers, and environmental monitoring instruments. The firm, founded in 1996, is a wholly-owned subsidiary of AMETEK and operates from Braintree, UK.

Ownership category

akta.pro rank

Product category

Industrial Gas and Particulate Sensors

NAICS

Other Measuring and Controlling Device Manufacturing (334519), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Electronic Components, Nec (3679)

akta.pro primary industry

Industrial-Grade Sensors & Transducer Components (Discrete sensing elements, transducers, MEMS sensors) (IMAGAJAO)

akta.pro secondary industries

Process Analytical Instrumentation (Gas analyzers, spectroscopy, pH/ORP, conductivity) (IMAGAFAE), Environmental Sensors (Temperature/Humidity/Gas/Air Quality) (HDAHALAD), Indoor Air Quality (IAQ) Environmental Monitoring (VOC/CO2/PM2.5) (HSAHAGAG), Gas Leak Detection (Natural Gas/Propane) & Combustible Gas Alarms (HSAHAGAI)

Keywords

• Gas sensors
• Electrochemical sensors
• Photoionization detectors
• Optical particle counters
• Industrial gas detection

Headquarters

HQ city

Braintree

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Gas and Particulate Sensors: Alphasense generates revenue primarily through the sale of gas sensors including Oxygen, CO2, toxic gas, and flammable gas sensors to industrial OEMs. The company also sells Optical Particle Counters for air quality and dust monitoring applications.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Alphasense designs, manufactures and supplies a wide range of gas and particulate sensors — including oxygen, carbon monoxide, hydrogen sulphide, NO/NO2, SO2, VOC, CO2, LEL/methane and specialty toxic gas sensors, plus optical particle counters — together with support electronics such as 4-20mA transmitter boards, Individual Sensor Boards and Analogue Front End circuits. These components are sold to industrial OEMs that build portable and fixed gas detection monitors, stack gas analysers, and environmental monitoring instruments.

Product overview

Alphasense is a specialized manufacturer of gas and particulate sensors with over 25 years of experience. The company offers a comprehensive portfolio of sensor products organized into distinct families: Oxygen Sensors (O2-A2, O2-A2-GLF lead-free), Carbon Monoxide Sensors (CO-AF, CO-BF), Hydrogen Sulphide Sensors (H2S-A1), Nitrogen Oxides Sensors (NO-A1, NO2-A1, NO2-B43F), VOC Sensors including both Electrochemical (VOC-A4, VOC-B4, VOC-B4-IST) and Photoionization Detector technologies (PIDX-A series, PID-AG5, PID-AH5, PID-AR5, PID-A15, PID-AY5), Optical Particle Counters (OPC-N3, OPC-R2), Flammable Gas Sensors (IRM-AT for methane/LEL), Carbon Dioxide Sensors using NDIR technology (IRC-AT), Specialty Toxic Gas Sensors, Dual Toxic Gas Sensors, and Environmental Sensors. Supporting the core sensors, Alphasense provides electronic interfaces including Support Circuits (PPM and PPB level), Individual Sensor Boards (ISBs), Analogue Front Ends (AFEs) in 2-way, 3-way, and 4-way configurations, and 4-20mA transmitter boards. The product portfolio serves industrial OEMs manufacturing portable or fixed gas detection monitors, stack gas analysers, and environmental monitoring instruments.

Differentiator

Problem solved

Functional benefit

Products and services

• Oxygen Sensors (O2) — including O2-A2 and O2-A2-GLF Lead-Free Galvanic oxygen gas sensors used for accurate O2 measurement in wearable and installed confined space monitors and industrial safety applications. The O2-A2-GLF variant is the world's first galvanic lead-free oxygen sensor built on a patent-pending leak-free platform.
• Carbon Monoxide Sensors (CO) Electrochemical carbon monoxide sensors engineered for precision and low cross-sensitivity to protect workers from CO exposure in chemical plants, refineries, and mining applications.
• Hydrogen Sulphide Sensors (H2S) Electrochemical hydrogen sulphide sensors providing exceptional sensitivity and stability for leak detection and worker protection in oil & gas, wastewater, and chemical processing safety applications.
• Nitric Oxide and Nitrogen Dioxide Sensors (NO / NO2) Electrochemical NO and NO2 sensors used for air quality and emissions monitoring in environmental monitoring stations, industrial emissions control, and research applications.
• Sulphur Dioxide Sensors (SO2) Sulphur dioxide sensors providing accurate detection for environmental compliance and industrial processes, used in power plants, industrial scrubbers, and environmental monitoring.
• PIDX Series Advanced PID VOC Sensors Next-generation photoionization detector sensors (PIDX-A series spanning 0-4ppm through 0-10,000ppm ranges) for accurate ppb-level VOC detection in air-quality monitoring, industrial hygiene safety, and environmental applications, with enhanced stability and repeatability in changing humidity.
• Carbon Dioxide Sensors (CO2) — NDIR Non-dispersive infrared (NDIR) carbon dioxide sensors (including IRC-AT) providing stable, selective CO2 measurement for indoor air quality, HVAC control, safety monitoring, and process applications.
• Flammable Gas Sensors — LEL/Methane and Hydrogen (IRM-AT) Infrared flammable gas sensors (including IRM-AT for methane/LEL) used to monitor methane (CH4) for its lower explosive limit and hydrogen gas to prevent explosions in industrial process monitoring and confined space monitors.
• Specialty Toxic Gas Sensors (O3, Cl2, PH3, NH3, HCN, HCl, EtO, H2O2) Specialty electrochemical toxic gas sensors for additional hazardous gases — Ozone, Chlorine, Phosphine, Ammonia, Hydrogen Cyanide, Hydrogen Chloride, Ethylene Oxide and Hydrogen Peroxide — applied in chemical processing, water treatment, semiconductor manufacturing and specialized industrial safety.
• Dual Toxic Gas Sensors Dual toxic gas sensors combining two sensors in one housing (e.g., H2S with CO or SO2) to save space in safety and industrial site monitoring markets.
• Optical Particle Counters (OPC-N3 and OPC-R2) Optical particle counters (OPC-N3, OPC-R2) for dust monitoring in air quality systems. Provide digital outputs of PM1, PM2.5, PM10 (and optionally PM4.25) plus histograms of particle count, with patent-pending flow correction for stable readings in high dust environments. Used in environmental monitoring networks, cleanroom applications and industrial dust control.
• Environmental Sensors (Temperature, Relative Humidity, Pressure) Environmental sensors measuring temperature, relative humidity and pressure, used alongside Alphasense's electrochemical, PID and NDIR sensors.
• Support Circuits (4-20mA Transmitter Boards, Individual Sensor Boards, Analogue Front Ends) Support electronics for integrating Alphasense sensors — including 4-20mA transmitter boards for fixed installation toxic/CO2/O2 measurement, low-noise Individual Sensor Boards (ISBs) pre-configured for B4 sensors in permanent fixed-site networks, and Analogue Front End (AFE) circuits in 2-sensor, 3-sensor and 3-sensor + PID configurations with Pt1000 temperature compensation for space-critical mobile air quality monitors.

Quantifiable outcome

• Best-in-class accuracy in PPB and PM monitoring
• +1 more outcomes

Segments4 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

One partnership is on record.

• AMETEKcoreOthersAlphasense is a subsidiary of AMETEK, a leading global manufacturer of electronic instruments and electromechanical devices. Contact email uses AMETEK domain ([email protected]), and US webstore is hosted under AMETEK Mocon brand (store.ametekmocon.com). Alphasense operates as part of AMETEK's sensor technology portfolio.

Scale indicators4 records

Recent moves2 records

Expansion highlights5 records

Direct peers

• City Technology (Honeywell): City Technology, now part of Honeywell, is one of the largest manufacturers of electrochemical gas sensors globally. It directly competes with Alphasense across oxygen, CO, H2S, and toxic gas sensors supplied to industrial OEMs.
• Sensirion: Sensirion is a leading Swiss manufacturer of environmental and gas sensors, including VOC, CO2, and particulate matter sensors. It directly competes with Alphasense in IAQ, HVAC, and environmental monitoring sensor markets.
• Amphenol Advanced Sensors: Amphenol Advanced Sensors manufactures a broad range of gas, humidity, and pressure sensors for industrial, medical, and automotive applications. It is a direct competitor to Alphasense in environmental and toxic gas sensor markets.
• Figaro Engineering: Figaro Engineering is a Japanese pioneer in semiconductor and electrochemical gas sensor technology, supplying toxic and combustible gas sensors to industrial OEMs — directly comparable to Alphasense's core sensor families.
• Membrapor: Membrapor is a Swiss manufacturer specializing in electrochemical gas sensors for industrial safety and emissions monitoring. It directly overlaps with Alphasense's toxic gas, O2, and OEM sensor business.

Broad incumbents

• Sensata Technologies: Sensata Technologies is a large industrial sensor company with significant presence in pressure, position, and environmental sensing. It is a broad incumbent serving many of the same OEM customers as Alphasense.
• Dragerwerk: Dragerwerk is a major German safety technology company that both manufactures and integrates gas detection sensors. It competes with Alphasense as a vertically-integrated player serving industrial safety markets.
• Honeywell: Honeywell is a large diversified industrial conglomerate with a significant gas detection and sensing portfolio (including City Technology). It is a broad incumbent in Alphasense's end markets for fixed and portable gas detection.
• Teledyne Technologies: Teledyne's environmental and electronic instrumentation divisions include gas detection and analytical sensor technologies. It is a broad incumbent competing with Alphasense in hydrogen and specialty gas detection.
• MSA Safety: MSA Safety is a global leader in safety instruments including fixed and portable gas detectors. It is profiled alongside Alphasense in the hydrogen detection market and competes as a broad incumbent in industrial gas monitoring.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/alphasense-ltd

Compliance4 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 Alphasense Ltd