What Posifa Technologies does

Posifa Technologies is a San Jose-based MEMS sensor company founded in 2007 that designs and manufactures thermal conductivity and mass air flow sensors for OEM integration into end-products across three verticals: electric vehicle battery packs and fuel cell systems (hydrogen leak detection), medical and industrial devices (mass air flow for oxygen delivery and respiratory care), and HVAC/refrigeration systems (A2L refrigerant leak detection). Its core product portfolio includes the PGS5100 Series MEMS hydrogen sensors — claimed to deliver a 100 ms response time (10x faster than prior generation), a 0–25% hydrogen concentration range, and a 15-year service life rating — the PMF82000 Series mass air flow sensors, and A2L refrigerant leak detection sensors also rated for 15-year reliability. The underlying technology platform is MEMS-based thermal conductivity sensing.

The company operates a B2B component-supplier model, selling directly to OEM manufacturers and offering both samples and production quantities. Its go-to-market is sales-led and OEM-embedded, relying on industry trade shows (notably Sensors Converge 2024) and earned trade-media coverage in EV, medical, and industrial publications rather than a disclosed distributor or rep-firm network. Posifa is led by founder and CEO Peng Tu, has 1–10 employees, has not disclosed revenue or external funding, and shows no public-company or parent-company affiliation in the available materials.

Name

Posifa Technologies

Website

https://posifatech.com

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

1–10 employees

Short description

Posifa Technologies is a San Jose-based MEMS sensor company that designs thermal conductivity and mass air flow sensors for OEM integration into EV battery packs, fuel cell systems, medical respiratory devices, and HVAC systems.

Ownership category

akta.pro rank

Product category

MEMS sensor components

NAICS

Other Measuring and Controlling Device Manufacturing (334519), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451)

SIC

Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Environmental Sensors (Temperature/Humidity/Gas/Air Quality) (HDAHALAD)

akta.pro secondary industries

Industrial Sensors (Pressure, Temperature, Flow, Level, Proximity, Vibration) (IMAGAFAA), Process Analytical Instrumentation (Gas analyzers, spectroscopy, pH/ORP, conductivity) (IMAGAFAE), Sensors, MEMS & Imaging ICs (HDAHAAAG)

Keywords

• MEMS thermal sensors
• Hydrogen leak detection
• Mass air flow sensors
• EV battery safety sensors
• Refrigerant leak detection

Headquarters

HQ city

San Jose

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hydrogen Sensor Sales: Sale of MEMS-based thermal conductivity hydrogen sensors (PGS5100 Series) to EV battery pack and fuel cell system manufacturers. Sensors detect hydrogen gas during thermal events. Revenue generated through component sales with samples and production quantities available.
2. Mass Air Flow Sensor Sales: Sale of PMF82000 series mass air flow sensors to medical and industrial device manufacturers. Revenue from sensor component sales for oxygen delivery and respiratory care applications.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels3 records

Core offering

Posifa Technologies designs and manufactures MEMS-based sensor components, including hydrogen sensors for EV battery packs and fuel cell systems, mass air flow sensors for medical and industrial devices, and A2L refrigerant leak detection sensors. The sensors are sold as components (samples and production quantities) to OEM manufacturers for integration into their end products.

Product overview

Posifa Technologies offers a portfolio of MEMS-based sensors including the PGS5100 Series for hydrogen detection in EV battery packs and fuel cell systems, the PMF82000 Series mass air flow sensors for medical and industrial applications, and A2L refrigerant leak detection sensors. The company specializes in thermal conductivity and mass air flow sensing technologies.

Differentiator

Problem solved

Functional benefit

Products and services

• PGS5100 Series MEMS-based thermal conductivity hydrogen sensors designed for early-warning detection of hydrogen gas during the initial off-gas stage of thermal events inside EV battery packs and fuel cell systems. Delivers 100 ms response time, 0–25% hydrogen concentration coverage, and a 15-year service life rating. Targeted at electric vehicle battery pack and fuel cell system manufacturers.
• PMF82000 Series Mass air flow sensors designed for medical and industrial applications, improving flow measurement accuracy, response time, and integration ease. Targeted at manufacturers of oxygen delivery systems, respiratory care devices, and similar equipment.
• A2L Refrigerant Leak Detection Sensors Sensors designed for A2L refrigerant leak detection in HVAC, refrigeration, and air conditioning systems, offering a 15-year reliability rating for safety compliance applications.

Quantifiable outcome

• 10x faster response time (100 ms) compared to previous generation hydrogen sensors
• +2 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators1 record

Recent moves4 records

Expansion highlights5 records

Broad incumbents

• Honeywell International: Honeywell's Sensing & Safety Technologies division manufactures gas detection sensors, mass airflow sensors, and pressure sensors serving industrial, medical, and HVAC markets. It is a broad incumbent that overlaps with Posifa across hydrogen detection, medical airflow, and refrigerant leak sensing.
• Murata Electronics: Large Japanese electronics manufacturer with a significant MEMS sensor portfolio including gas, flow, and environmental sensors. Exhibited alongside Posifa at Sensors Converge 2024 and competes across multiple of Posifa's target verticals.
• TDK Corporation: Global electronics giant with a broad MEMS sensor portfolio including environmental, gas, and flow sensors. Co-exhibited with Posifa at Sensors Converge 2024; competes in the same automotive, industrial, and HVAC sensor markets.
• Bosch Sensortec: Bosch's MEMS sensor arm produces environmental, gas, and flow sensors used in consumer, automotive, and industrial applications. Comparable as a broad incumbent in MEMS gas and environmental sensing.
• Infineon Technologies: German semiconductor manufacturer with a MEMS sensor portfolio spanning environmental, gas, and pressure sensors for automotive and industrial applications. Comparable as a broad incumbent competing in Posifa's target markets.

Direct peers

• Sensirion: Swiss MEMS sensor specialist offering gas, flow, and differential pressure sensors for medical, HVAC, and industrial applications. Closely comparable to Posifa on technology (MEMS-based), product categories (gas + flow), and target verticals (medical/respiratory + HVAC).
• Amphenol Advanced Sensors: Amphenol's sensor portfolio includes medical gas flow sensors, hydrogen sensors, and refrigerant leak detection devices. Directly comparable to Posifa on product mix (hydrogen + medical airflow + refrigerant) and OEM-embedded GTM motion.
• Figaro Engineering: Japanese gas sensor specialist with a long-established portfolio in hydrogen, refrigerant, and combustible gas detection. Directly comparable to Posifa on gas-sensing technology and HVAC/refrigeration and safety end markets.
• MultiDimension Technology: Specialized MEMS sensor company offering magnetic, flow, and environmental sensors including hydrogen and refrigerant detection. Co-exhibited with Posifa at Sensors Converge 2024; similar scale and product overlap.
• City Technology (Honeywell): Specialist gas sensor manufacturer (now part of Honeywell) focused on electrochemical and MEMS gas detection for medical, industrial safety, and HVAC. Comparable as a gas-sensing specialist with overlapping customer base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat2 records

Key risks7 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 Posifa Technologies