Sierra Instruments

What Sierra Instruments does

Sierra Instruments, Inc. is a privately held industrial flow measurement company founded in 1973 by Dr. John G. Olin in Monterey, California, and currently operating as a member of the TASI Measurement diversified measurement technology conglomerate. The company designs and manufactures high-performance flow meters and controllers based on three core measurement technologies: thermal mass flow (including capillary and immersible sensors), multivariable vortex flow, and transit-time ultrasonic flow. Its product portfolio spans the QuadraTherm series (640i, 780i) with patented DrySense no-drift sensors and qTherm calibration algorithms, the InnovaMass vortex family (240S, 241S, 240i) powered by the Raptor II operating system, the InnovaSonic ultrasonic line (203, 210), and the SmartTrak mass flow controller series (50, 100) featuring patented laminar flow elements and frictionless-hovering control valves. Supporting offerings include the CalTrak primary standard calibration systems, Compod network enablement modules, qMix gas mixing software, and the BG3 EPA-certified partial flow dilution engine emissions system.

The company's revenue model rests on three streams: hardware sales of flow meters and controllers (with same-day and FastShip next-day shipping on in-stock catalog products), professional services including NIST-traceable primary standard calibration, repair, and field services, and OEM/private-label solutions embedding Sierra technology into machine builders' and systems integrators' products. Sierra serves horizontal end-markets — semiconductor fabrication, pharmaceutical manufacturing, oil & gas (flare gas and EPA emissions), aerospace and defense (Lockheed Martin cryogenic testing), engine test and automotive (Caterpillar BG3, Mugen-Honda motorsports), wastewater/biogas (Santa Cruz), brewing (Orval), and European power utilities (SF6 compliance) — through direct e-commerce, field sales across 150+ global locations with EMEA and APAC headquarters, OEM channels, and a request-a-quote system for custom configurations. The firm holds over 30 patents (most still in active products), maintains ISO 9001:2015 and ISO 14001:2015 certifications alongside FM, CSA, ATEX, IECEx, CRN, and EPA regulatory approvals, and differentiates on accuracy (±0.5% of reading on QuadraTherm), lifetime sensor warranty, no-charge custom flow engineering, and a large installed base exceeding 140,000 instruments globally.

Name

Sierra Instruments

Legal name

Sierra Instruments, Inc.

Website

https://sierrainstruments.com

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

101–250 employees

Short description

Sierra Instruments designs and manufactures high-accuracy thermal mass flow, vortex, and ultrasonic flow meters and controllers for gas, liquid, and steam applications, serving semiconductor, oil & gas, aerospace, pharmaceutical, and engine-test customers across 150+ global locations as a member of the TASI Measurement group.

Ownership category

akta.pro rank

Product category

Industrial Flow Measurement Instruments

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Totalizing Fluid Meter and Counting Device Manufacturing (334514), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Totalizing Fluid Meters & Counting Devices (3824)

akta.pro primary industry

Sensors & Feedback Devices (Pressure, Flow, Position, Encoders, Transducers) (IMAHAGAK)

Keywords

• Thermal mass flow meters
• Mass flow controllers
• Vortex flow meters
• Ultrasonic flow meters
• Industrial flow measurement instruments

Headquarters

HQ city

California

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Sales - Flow Meters and Controllers: Core revenue from manufacturing and selling thermal mass flow meters, mass flow controllers, vortex flow meters, and ultrasonic flow meters. Products range from laboratory-scale capillary sensors to industrial-scale insertion meters. Same-day shipment for in-stock products.
2. Primary Standard Calibration & Field Services: NIST-traceable calibration, repair, and field services for mass flow meters and controllers. Specialization in Primary Standard flow calibration.
3. OEM and Private Label Solutions: Custom flow meter solutions for Original Equipment Manufacturers including private labeling and custom design to meet pricing and design goals.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels7 records

Core offering

Sierra Instruments designs, manufactures, and sells high-accuracy industrial flow measurement and control instruments — thermal mass flow meters and controllers, multivariable vortex flow meters, and transit-time ultrasonic flow meters — for gas, liquid, and steam applications. The company also provides NIST-traceable primary standard calibration, repair, and field services, and offers private-label/OEM flow solutions for machine builders and systems integrators.

Product overview

Sierra Instruments designs and manufactures high-performance flow measurement and control instruments for industrial applications. The product portfolio centers on three core measurement technologies: thermal mass flow meters and controllers, vortex flow meters, and transit-time ultrasonic flow meters. The main product families include the QuadraTherm series (640i, 780i) featuring patented DrySense no-drift sensors and qTherm algorithm technology for thermal gas measurement; the InnovaMass series (240S, 241S, 240i) offering multivariable vortex meters for steam, gas, and liquid applications; the InnovaSonic series (203, 210) for clamp-on and portable ultrasonic liquid flow measurement; and the SmartTrak series (50, 100) providing capillary thermal mass flow controllers for precision gas control. Supporting products include the Compod network enablement module, CalTrak calibration systems, and qMix gas mixing software. The company also offers an Autotest Division for engine testing and emissions measurement including the BG3 Partial Flow Dilution system. Products serve diverse industries including oil and gas, semiconductor, pharmaceutical, water treatment, food and beverage, and clean energy.

Differentiator

Problem solved

Functional benefit

Brands

• QuadraTherm: Thermal mass flow meters featuring patented QudraTherm 4-Sensor Thermal Technology delivering +/- 0.5% of reading accuracy with DrySense sensor technology.
• SmartTrak
• InnovaMass
• InnovaSonic
• FastFlo
• FlatTrak
• SteelMass
• MaxTrak
• SideTrak
• MultiTrak
• Compod
• BioTrak
• CalTrak
• BoilerTrak
• BG3

Products and services

• QuadraTherm 640i Thermal insertion mass flow meter with patented QuadraTherm 4-Sensor technology delivering ±0.5% of reading accuracy above 50% of calibrated full scale, featuring DrySense no-drift sensor with lifetime warranty.
• QuadraTherm 780i Inline thermal mass flow meter offering the highest air/gas mass flow measurement accuracy in the industry, part of the QuadraTherm family with qTherm algorithm technology.
• InnovaMass 240S Inline vortex flow meter for saturated or superheated steam, gas, and liquid applications, available in volumetric or multivariable versions measuring five process parameters simultaneously.
• InnovaMass 241S Insertion vortex flow meter powered by Raptor II Operating System for pipe sizes from 2 inches to 72 inches, available in volumetric and multivariable configurations.
• InnovaMass 240i Inline vortex flow meter ideal for pipe sizes up to 8 inches, equipped with the Raptor II Operating System featuring apps for field configuration.
• InnovaSonic 203 Economical clamp-on ultrasonic water flow meter using transit-time digital signal processing for HVAC, irrigation, and liquid applications without pipe cutting or process shutdown.
• InnovaSonic 210 Portable ultrasonic liquid flow meter with Bluetooth Android tablet PC connectivity for field flexibility, featuring 1GB SD memory card and 8-hour battery operation.
• SmartTrak 100 Premium digital mass flow controller and meter with multi-gas capability, featuring patented laminar flow element design and frictionless-hovering control valve for precision gas flow control.
• SmartTrak 50 Low-cost digital mass flow controller and meter with OEM pricing, 5-point NIST calibration, available in aluminum or 316 stainless-steel construction.
• SteelMass 640S Insertion thermal mass flow meter optimized for methane and biogas measurement with 100:1 turndown, self-cleaning purge option, and patented Dry-Sense sensor technology.
• FlatTrak 780S Inline thermal mass flow meter with built-in flow conditioning eliminating piping straight-run requirements, featuring 100:1 turndown and removable probe design.
• MultiTrak 670S Multipoint thermal mass flow meter with up to four 640S flow meters linked via Modbus for accurate measurement in large ducts with non-uniform velocity profiles.
• MaxTrak 180 Industrial mass flow controller with Dial-A-Gas multi-gas capability, 316 stainless-steel construction, and flow rates from 10 to 1000 SLPM.
• SideTrak 840 Analog mass flow controller for precise primary calibration measuring clean, dry gases including oxygen, mixtures, toxics, corrosives, and combustibles.
• BG3 Partial Flow Dilution System Partial flow dilution sampling system for engine particulate-matter measurement, EPA-certified and recognized as a legal alternative to CVS systems under 40 CFR Part 1065.
• BoilerTrak 620S-BT Insertion thermal mass flow meter specifically designed for boiler and heater efficiency measurement applications.
• FastFlo 620S Fast-response insertion thermal mass air flow sensor for biogas and landfill gas measurement applications.
• MassTrak 810 Economical analog mass flow controller for combustion control and gas blending applications with flow ranges from 0-10 sccm to 0-50 slpm.
• RedySmart Controller Mass flow controller in the RedySmart family for precision gas flow measurement and control applications.
• RedyCompact Controller Compact mass flow controller offering precision gas flow control in a space-efficient design.
• InnovaSwitch Flow Switch Flow switch for precision detection of liquid and gas flows in industrial applications.
• BioTrak 645i/745i Thermal flow meter designed for wastewater applications with insertion and inline configurations plus remote options.
• CalTrak Primary Standard Calibration Systems and Services Primary standard NIST-traceable calibration, repair, and field services for mass flow meters and controllers ensuring measurement accuracy across the Sierra installed base.

Quantifiable outcome

• QuadraTherm 640i accuracy: +/- 0.5% of reading above 50% of calibrated full scale
• +5 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Five partnerships are on record, tiered flagship and core.

• United States Environmental Protection AgencyflagshipStrategic or Co-development Partner · 1 January 2005EPA collaborated with Sierra over five years on BG3 vs CVS multiple engine correlation studies. EPA certified BG3 for use in engine certification and compliance to 2005 standards, resulting in landmark regulatory change allowing Partial Flow Dilution as alternative method to CVS.
• CP EngineeringcoreStrategic or Co-development Partner · 1 January 2002Technology partner in BG3 development aimed towards 2007 and Tier 4 emissions standards. Partnership focused on transient measurement capabilities for on-road diesel market.
• CaterpillarflagshipStrategic or Co-development Partner · 1 January 1991Exclusive partnership beginning in 1991 to develop BG1 partial flow dilution system for engine emissions testing. Expanded partnership led to BG2 (1990s) and BG3 (2002) development. Caterpillar worked with Sierra on EPA correlation studies resulting in BG3 becoming legally recognized alternative to CVS systems under 40 CFR part 1065 in 2011.
• Energy Maintenance Technologies (EMT)coreTechnology or IntegrationPartnership with EMT in Luton, England to develop SF6MFU portable system for high voltage switchgear SF6 top-off and fill operations. Sierra's SmartTrak 100 mass flow controller is key component in EMT Assero SF6MFU device for SF6 gas monitoring and compliance with Kyoto Protocol.
• TASI MeasurementflagshipOthersSierra Instruments is a member of TASI Measurement family of companies, providing measurement instrumentation solutions.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Bronkhorst High-Tech: Dutch specialist in thermal mass flow meters and controllers for gas and liquid low-flow applications. Directly comparable to Sierra's SmartTrak, MaxTrak, and MassTrak product lines for OEM and laboratory customers.
• Bürkert Fluid Control Systems: German fluid control and mass flow controller manufacturer with strong European OEM presence. Comparable on MFC product breadth and target markets in pharma, semiconductor, and industrial gas.
• Brooks Instrument: Manufacturer of thermal mass flow controllers and meters for semiconductor, biopharma, and industrial gas applications. Closely comparable to Sierra's MFC portfolio in target customers and use cases.
• MKS Instruments: Provides mass flow controllers, pressure gauges, and gas delivery systems primarily for semiconductor and advanced manufacturing. Directly comparable in the OEM semi/solar channel where Sierra's SmartTrak and Compod compete.
• Horiba: Provides engine test and emissions measurement equipment (including partial flow dilution systems and gas analyzers) that overlaps with Sierra's Autotest/BG3 engine testing offering for OEM and certification labs.

Broad incumbents

• Endress+Hauser: Global leader in industrial process measurement instrumentation, including a broad portfolio of Coriolis, vortex, ultrasonic, and thermal mass flow meters. Competes with Sierra across most process-industry verticals but with a much wider portfolio.
• ABB Measurement & Analytics: Industrial flow and process analytics portfolio spanning Coriolis, vortex, ultrasonic, and pressure-based meters. Competes with Sierra across process industries, particularly in oil & gas and power.
• Yokogawa Electric: Process automation supplier with a strong flowmeter portfolio (Coriolis, vortex, magnetic) for oil & gas, chemical, and power. Competes with Sierra in large industrial flow measurement projects.
• Emerson Electric (Rosemount): Industrial automation conglomerate whose Rosemount line is a dominant supplier of flow, pressure, and level instrumentation. Overlaps with Sierra in oil & gas, chemical, and power generation flow applications.

Emerging players

• AVL List: Engine and powertrain development specialist providing test systems, instrumentation, and simulation. Comparable to Sierra's Autotest division for engine and vehicle testing, though AVL is a broader test-system integrator.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/sierraflow
• Facebookfacebook.com/sierrainstruments
• LinkedInlinkedin.com/company/sierra-instruments

Compliance10 records

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 Sierra Instruments