SENSORS AND DETECTORS
1 February 2010
The NeoFox Sport from Ocean Optics is a portable, handheld optical oxygen sensor for measuring dissolved and gaseous oxygen pressure in a variety of media. The sensor uses a sol-gel coating embedded with an oxygen indicator and can be applied to patches or probes. Patches are useful for measuring headspace gases and other parameters inside packages and containers; probe options range from slender, 300µm-diameter fibre assemblies for fine spatial resolution applications to robust, ¼-inch OD stainless steel configurations for process environments. Coating formulations are available for general lab use, high-sensitivity applications and hydrocarbon-rich sample environments.
Comprised of a probe- or patch-based oxygen sensor, plus a phase fluorometer, the NeoFox Sport fluorescence-based optical oxygen system includes an onboard microprocessor with low-power OLED display, a user interface and a battery pack. The user interface permits such functions as setting single- or multi-point calibration and displaying oxygen readings in per cent oxygen, partial pressure, moles per litre and other parameters. Data is captured and stored to a 2GB SD card for retrieval on the NeoFox Sport itself or via an SD card reader connected to a PC. Response times range from <1.0 seconds in gas to ~30 seconds in liquids, with dissolved oxygen range (O2 per cent at 1 Atmosphere) of 0-100 per cent for most applications.
The sensors combine the best of advances in materials sciences and phase fluorometry. A fluorescence-based transducer material is trapped in a sol-gel coating that is applied to the probe or patch. When the material, or indicator changes optical properties in response to specific analytes in its immediate environment, the NeoFox Sport measures the response. Unlike polarographic and galvanic oxygen meters, the NeoFox Sport optical oxygen sensor is immune to environmental changes in pH, salinity and ionic strength. Other advantages of optical oxygen sensors include no sample consumption, no need for frequent calibration and no interference from electromagnetic interference.
Optional add-on accessories for NeoFox Sport include a battery-life extender for up to 25 hours of continuous operation and a field-friendly carrying pack with shoulder strap. OEM options are also available.