Fluorescent Optical Oxygen Sensor Makes a World of Sense

SST Sensing Ltd (UK) has adapted a proven and reliable oxygen sensing technology and developed this into a miniaturised oxygen sensor aimed at OEMs. The technology, packaged in a small 'can style' housing, uses fluorescence quenching by oxygen to determine the oxygen content in a given environment. The sensor incorporates a temperature sensor which removes the need for external hardware or software temperature compensation.

An optional pressure sensor allows the sensor to report the oxygen concentration as well as the oxygen partial pressure. The standard ‘can’ style sensor provides an RS232 output, SST Sensing's Evaluation Board allows customers to trial the product and provide a variety of outputs (RS232 and 0-10V and 4-20mA and Modbus) and their Industrial Board provides the output specifically to match customer’s requirements (RS232 or RS485 or 0-5V or 4-20mA).

Connection to the host microcontroller is by a simple two-wire interface and requires no ancillary components like amplifiers, A-to-Ds and temperature sensors. This saves on both design time and bill of material cost.

The gas temperature and the gas pressure (in models with built-in pressure sensor) can also be sent to the host.

A stabilisation process performed during manufacture removes initial short-term sensor drift ensuring the long-term stability of the product.
Unlike standard electrochemical sensors, LuminOx contains no hazardous materials and is fully RoHS compliant.

Used for many years in complex, high value instrumentation products, LuminOx technology is proven to be robust and accurate. SST uses a unique formula to ensure stability and long life, in a significantly smaller package than previously available. Data from trials using this technology in high-value instruments showed a drift of less than 0.3% O2 in ten years without re-calibration.
LuminOx’s non-consumptive sensing principle means that shelf-life issues associated with electrochemical sensors are non-existent.

Sensors measuring 0-300mbar O2 partial pressure and 0-25% vol. O2 are currently available, fully calibrated, from SST Sensing’s factory in Scotland.

LuminOx is a complimentary addition to SST’s current Zirconia oxygen sensing product portfolio.