Knick Oxygen Measurement
Knick’s analog and digital oxygen sensors use amperometric and optical measuring principles to cover a wide range, from trace to pure oxygen.
All sensors are suitable for hygienic applications and are compatible with a wide range of fittings and end brackets, including our retractable fittings such as SensoGate and Ceramat as well as inline fittings, flow-through fittings, and immersion fittings.
MemoSuite Sensor Management Tool
Memosens contactless sensor coupling
SE707 Oxygen Sensor | Memosens | 120 mm
Ex | Measuring range (resolution) 0 ... 50 mg/l (1 μg/l)
Reliable measurement of oxygen traces, also under sterile and hygienic conditions; signal-stable and robust, digital, with Memosens technology.
- perfect galvanic isolation thanks to Memosens technology
- precalibration in the lab
- no influence of humidity in the connector
- digital data transfer
- integrated sensor diagnostics
- high level of process safety
- durable materials
- robust design
- easy to clean thanks to extremely smooth surface
- very simple calibration in air without calibration gases
- very high resolution of 1 ppb in the trace range
- cost-efficient service due to easy-to-replace membrane module and interior body
- hygienic design
- low cross-sensitivity to CO2
- operation also in hazardous locations
High resolution of low oxygen concentrations, simple and cost-efficient sensor calibration in ambient air. No calibration gases. High signal stability, also in the presence of high CO2 partial pressures.
FDA-conforming material with extremely smooth polished surface. Simple maintenance due to modular design. Sterilizable, autoclavable, and CIP capable. Also suitable for hazardous locations.
Applications
Beverage filling (e.g. milk, beer), measurement in boiler feed water (detection limit 1 ppb)
Specifications
| Measurement Parameter: | Oxygen |
| Perm. temp range (measurement): | 0 ... 80 °C |
| Permissible pressure range (measurement): | 0.2 ... 6 bar absolute |
| Connector: | Memosens |
| Measuring Range: | pO₂ < 1,200 mbar |
| Explosion protection: | Yes |
| Length: | 120 mm |
| Temperature Detector: | NTC 22 kΩ |
| Measuring principle: | Amperometric |
| Membrane material: | PTFE / silicone / PTFE, FDA compliant (steel-mesh reinforced) |
| Flow dependence: | ≤ 5 % |
| Signal Transmission: | digital |
| Mechanical pressure resistance: | Max. 12 bar absolute |
| Temperature range (stability): | –5 ... +121 °C (steam sterilizable/autoclavable) |
| Accuracy: | 1 % + 1 ppb (1 % + 3 ppb in liquids containing CO₂) |
| Signal in ambient air: | 290 … 500 nA |
| Response time at 25 °C (air –> N2): | 98 % full scale < 90 s |
| Residual signal in O₂-free medium: | ≤ 0.1% of signal in ambient air | In CO2: ≤ 0.01% of signal in ambient air |
| O-ring material (process-wetted): | silicone (FDA & USP Class VI tested) |
| Process-wetted sensor parts: | Stainless steel 1.4404 (material certificate 3.1B) |
| Surface roughness: | N 5 (RA < 0.4 μm) |
| Interior body incl. electrodes: | replaceable (ZU 0568) |
| Detection limit: | 1 ppb (3 ppb in liquids containing CO₂) |