About Alpha Instruments
We don't make level sensors. We don't make temperature sensors. We make only low differential pressure sensors — and we make the best. Here's the story behind that conviction.
Born in an MIT Lab. Proven in the Field.
In 2005, an MIT engineering professor saw a problem that nobody was solving: differential pressure sensors were either accurate and expensive, or affordable and unreliable. There was no middle ground.
Drawing on decades of MEMS and capacitive sensing research, he developed a proprietary sensor element that delivered laboratory-grade accuracy at a price HVAC/R and industrial customers could justify. That sensor became the foundation of Alpha Instruments.
Today, the company holds 18+ US and international patents covering capacitive sensor design, signal conditioning, and temperature compensation algorithms. Every sensor we ship is built on technology we invented — not licensed from someone else.
Two Decades of Pressure Sensing Innovation
Company Founded
Alpha Instruments incorporated in Massachusetts by an MIT engineering professor. Initial R&D focused on a novel capacitive MEMS pressure sensing element — the technology that would become the core of every Alpha product.
First Patent Granted
US Patent issued for the proprietary capacitive sensor design. This patent — and the 17+ that followed — forms the intellectual property foundation that differentiates Alpha from generic sensor manufacturers.
First Product Line: Model 161–165
Commercial launch of the core product range covering 0.1″ to 100″ WC. Immediate adoption by HVAC/R OEMs who had been underserved by expensive industrial sensor brands.
ISO 9001 Certification
Quality management system certified to ISO 9001:2008 (upgraded to 9001:2015 in 2018). NIST-traceable calibration procedures formalized for all production sensors.
Cleanroom & Semiconductor Markets
Model 165 ultra-low range transducer launched — specifically engineered for semiconductor cleanroom pressure cascading. Rapid adoption by major Asian semiconductor fabs.
Global Expansion
Distribution network established across 50+ countries. Products certified CE, RoHS, UL. Explosion-proof Model 170 launched for oil & gas and hazardous location applications.
Next-Generation Sensor Platform
Digital RS485 Modbus RTU output with on-board temperature compensation added across product line. Current R&D focused on IoT-enabled predictive maintenance and wireless sensor integration.
We Don't Ask You to Take Our Word for It
Every certification below is audited by independent third parties. Every calibration is NIST-traceable. Every certificate ships with the sensor. No exceptions.
ISO 9001:2015
Audited Annually
Quality management system covering design, manufacturing, calibration, and customer support. Certified by an ANAB-accredited registrar — not a self-declaration. Re-audited every year with zero major non-conformities since initial certification.
NIST-Traceable Calibration
Every Sensor. Every Time.
Every sensor we ship is individually calibrated against NIST-traceable pressure standards. A calibration certificate is included in the box — not an extra-charge option. Our calibration lab follows ISO 17025 guidelines for measurement uncertainty.
CE Marking
European Union
All models are CE marked under EMC Directive 2014/30/EU and applicable pressure equipment directives. Declarations of Conformity available for download. Ready for immediate deployment in EU markets.
UL Recognized Component
USA & Canada
Models 161, 162, 164, 165, 166, and 168 bear the UL Recognized Component Mark for US and Canadian markets. Accepted by AHJs, panel builders, and OEM integrators across North America.
RoHS 3 · REACH
Environmental Compliance
All products are RoHS 3 (EU 2015/863) compliant — including the 4 new phthalate restrictions. REACH SVHC declarations available upon request. Full material disclosure for EU, UK, and California Proposition 65.
ATEX / IECEx
Hazardous Locations
Model 170 certified for Zone 1 / Zone 2 potentially explosive atmospheres under ATEX Directive 2014/34/EU and IECEx Scheme. For oil & gas, chemical processing, and mining applications requiring explosion protection.
Made in USA
Acton, Massachusetts
R&D, engineering design, and final calibration are performed in our Acton, MA facility. Qualifies for Buy American Act and infrastructure projects requiring US-origin instrumentation. Not just assembled — engineered and calibrated in America.
2-Year Warranty
Industry-Leading Coverage
Every Alpha sensor is backed by a 2-year warranty against defects in materials and workmanship — double the industry standard. Combined with lifetime technical support, your investment is protected from day one through end-of-life.
Serving 50+ Countries Worldwide
Headquartered in Acton, Massachusetts, with manufacturing operations in Tianjin, China, and distribution partners across six continents.
Americas HQ
Acton, Massachusetts
R&D · Engineering · Calibration
Manufacturing
Tianjin, China
Production · Assembly · Testing
European Distribution
Rotterdam, Netherlands
Warehouse · EU Fulfillment
Asia-Pacific Partners
15+ Authorized Distributors
Japan · Korea · Taiwan · SE Asia · India