Hach Orbisphere Electrochemical Oxygen (O₂) Sensor, Stainless Steel, 50 bar, EPDM O-Ring, fast temperature change option

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Product #: 31120A.01

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ORBISPHERE 311XX - the ultimate in O₂ sensors

The patented polarographic sensor design is a proven performer wherever knowledge of O2 content is critical. From beverage quality control to corrosion monitoring in power generators, from package sampling to chemical manufacturing, this sensor provides fast, accurate oxygen measurements, in gaseous or liquid samples.

A wide range of temperature and pressure ranges is made possible by the exclusive valve seat sealing, whereby the sensor cathode is mechanically tensioned against a ceramic valve seat to ensure the integrity of the seal. This design enables a vanishingly small residual signal, for improved accuracy.

All these oxygen sensors use the deep-draw membrane mounting method for a uniformly thin layer of electrolyte for faster response and superior stability. Coupled with a screw-on protection cap, the sensor provides in-service intervals of up to a year.

From trace levels to super saturation
Unrivalled detection limit of ±0.1 ppb or 100 ppt
Guard Ring Electrode design improves speed of response and reduces interferences
Installs in-line for process control, or in flow chamber for spot measurement