About Scientific Instruments – Cryogenic Temperature Instruments

Scientific Instruments, Inc. was founded in 1967 by aeronautical engineer Jack Hoey and physicist Gilbert Halverson. Coming from aerospace and Academic backgrounds, they developed the first commercially available Germanium Resistance Thermometer (GRT) and supplied these devices for use on the Apollo Lunar Program.

leigh ann hoey

Leigh Ann Hoey

Today, Scientific Instruments, Inc is owned and operated by founder Jack’s daughter, Leigh Ann Hoey. An ISO 9001 certified company, Scientific Instruments is involved in the design and manufacture of cryogenic temperature sensors for laboratory, industrial and medical applications. Other product areas include temperature indicators and controllers, petrochemical tank gauging systems for liquid natural gas (LNG) Storage tanks, LNG composition analyzer systems and aircraft temperature probes which are used on all Boeing and Airbus aircraft.

Scientific Instruments product line reaches a global marketplace and is committed to providing the very best customer service with experienced staff and other fully trained, global representatives. Management stands behind its Quality System which supports and ensures customer requirements are met and fully satisfied.

Leigh Ann Hoey

Scientific Instruments Product Development

The initial products developed and manufactured by Scientific Instruments were cryogenic temperature sensors including Germanium Resistance thermometers and Silicon Diodes. These temperature sensing devices created opportunities in the aerospace, industrial and laboratory research industries. Of particular note is the fact that SII supplied a number of Germanium Resistance thermometers that were installed into Helium and Hydrogen systems on the Apollo space craft and at the end of the 1960’s flew on lunar landing missions.

The company presently is active in seven distinct product areas, although separate; these products are “synergistic” as they are technologically related to temperature and liquid level measurement and control. With one exception, all product areas supported by Scientific Instruments are related to cryogenic applications, meaning extremely low temperatures, typically in range of 0.05K to 300.0K (-459.58 F to +250.0 F).

These products include cryogenic temperature sensors, cryogenic temperature instruments (controllers/monitors), liquid natural gas- level, temperature & density gauge (LTD), Raman Spectroscopy (RGAS) for LNG, aerospace temperature probes, aircraft temperature probes, and industrial probes.