Orion Instruments

• Magnetic Level Indicators
• Patented “Aurora” MLI utilizing Guided Wave Radar providing true redundancy
• Magnetostrictive Level Transmitters

Orion products combine market-tested MLI design principles with advanced level sensing technology.

Aurora Magnetic Liquid Level Indicators

Aurora is a totally redundant system of continuous level monitoring and control. An Eclipse guided wave radar coaxial probe is housed along with the MLI float in a 3″ or 4″ diameter chamber. While the indicator relies upon the float and its internal magnets to activate the flags or shuttle, the Eclipse measures the liquid level directly. Two completely separate technologies in a single external chamber ensure redundancy unlike any other MLI. The use of a baffle within the chamber ensures that the float and eclipse coaxial probe work seamlessly within the single chamber.

There are six basic configuration styles and over fifteen material selections for Aurora. For the first time ever, the ability to accurately and reliably measure ultra low dielectric media, high pressure/high temperature process conditions, and media with shifting and changing dielectric values can be accomplished with Aurora.

Atlas & Gemini Magnetic Level Indicators

The Atlas is Orion’s standard, high performance magnetic level indicator. Atlas is a single chamber design with either 2″, 2.5″, or 3″ chamber diameter, as required by the application. There are twelve basic configuration styles, including top mount models.

Gemini’s twin chamber design is unique to the magnetic level gauge industry. Over 18 configuration styles are available with Gemini, and though not available in plastics, it may be produced in the same metal material selections as Atlas.


The Jupiter Magnetostrictive level transmitter provides a 4-20 mA output, proportional to the level being measured. Jupiter models are designed to attach quickly and easily, via standard clamps, to Orion’s Atlas and Gemini magnetic level indicators or can be directly inserted into a wide variety of process vessels.

The Eclipse Model 705 is a two-wire, loop-powered, 24 VDC liquid level transmitter based on the revolutionary Guided Wave Radar (GWR) technology. The Model 705 can be used all with all available coaxial, twin rod and single rod probes. This leading-edge transmitter is designed to provide measurement performance well beyond that of many traditional technologies.

The OCT-400 analog transmitter mounts directly to the side of the Atlas or Gemini Chamber, providing a continuous 4-20 mA output signal proportional to liquid level.