Underwater Oxygen Sensors

PyroScience optical oxygen sensors are available in various formats. Sensor caps for monitoring applications, fibre based sensors and ultra high speed sensors for eddy covariance measurement.

Oxygen Flow Through Cells, Sensor Caps and Sensor Spots

XFLOW-HS

Sterile high speed oxygen flow-through cell
Integrated optical oxygen sensor
Sterilized using 25kGy beta-irradiation
Luer lock adapters for ca. 3.2 or 4.8 mm ID tubing
Works in gas (%oxygen) and liquids (DO)
High speed response time (t90 < 1s)

These flow-through cells (PU=4 pieces) have an integrated oxygen sensor for continuous measurements of gaseous or aqueous liquid samples pumped through the cell. The cell consists of a Luer-lock T-Connector with a removable oxygen probe. The Luer-lock connectors allow direct connection of tubing with 3.2 or 4.8 mm inner diameter.

OXCAP-SUB

Oxygen sensor cap for unterwater meters
Sensor screw cap with integrated optical oxygen sensor
Fast sensor with low drift
For all devices with -SUB connector
Minimize maintenance by simply exchanging the cap
Negligible drift, >3 years shelf time

The OXCAP-SUB integrates an oxygen sensor spot especially developed for underwater and deep-sea applications. The OXCAP is attached via the PyroScience SUB-connector directly to a compatible read-out device. An additional protective cap makes the OXCAP highly robust against mechanical impact and ideal for long-term monitoring applications. The sensing principle is based on an optical detection method and shows virtually no drift and fast response. For profiling applications, we recommend our high-speed sensor cap.

UTROXCAP-SUB

Ultra-trace oxygen sensor cap for underwater meters
Sensor screw cap with integrated optical ultra-trace oxygen sensor
Fast sensor with low drift
For all devices with -SUB connector
Minimized maintenance by simply exchanging the cap

The ultra-trace oxygen sensor cap UTROXCAP-SUB integrates an ultra-trace range oxygen sensor spot (without optical isolation), especially developed for underwater and deep-sea applications. The UTROXCAP can be screwed directly onto the PyroScience SUB-connector of a compatible underwater read-out device. The UTROXCAP-SUB is protected and hence highly robust against mechanical impact and ideal for long-term monitoring applications. The sensing principle is based on an optical detection method and shows virtually no drift and fast response. The UTROXCAP-SUB is especially suited for trace oxygen detection in oxygen minimum zones or during de-oxygenation events underwater.

OXCAPG-UHS-SUB

Ultra high speed oxygen sensor
Sensor screw cap with integrated optical oxygen sensor
Ultra high speed response time (t90 < 0.5s)
Ideal for profiling applications
No oxygen consumption

The OXCAPG-HS-SUB integrates an optical fibre coated with an oxygen sensor especially developed for underwater and deep-sea applications. The OXCAPG is attached via the PyroScience SUB-connector directly to a compatible read-out device. An additional protective cap makes the OXCAPG highly robust against mechanical impact. The sensing principle is based on an optical detection method and shows virtually no drift and fast response. The ultra high-speed response time makes this sensor suitable for profiling applications or eddy covariance measurements.

OXCAPG-HS-SUB

Oxygen sensor cap for profiling
Sensor screw cap with integrated optical oxygen sensor
High speed response time (t90 < 1s)
Ideal for profiling applications
No oxygen consumption

The PyroScience OXCAPG-HS-SUB integrates an optical fiber coated with an oxygen sensor especially developed for underwater and deep-sea applications. The OXCAP is attached via the PyroScience SUB-connector directly to a compatible read-out device. An additional protective cap makes the OXCAP highly robust against mechanical impact. The sensing principle is based on an optical detection method and shows virtually no drift and fast response. The high-speed response time makes this sensor suitable for profiling applications or eddy covariance measurements. If even faster sensors are required, please refer to our ultra-high speed sensor OXCAPG-UHS-CAP.

OXSP5-SUB

Oxygen sensor spots for aquatic applications
Sensor spots (8 pcs.) 5mm in diameter
For underwater devices (-SUB)
Minimized influence of hydrostatic pressure
Suitable for in-situ incubations
No oxygen consumption

Oxygen sensor spots allow oxygen measurements in closed sample containers under water with contactless read-out through a transparent window (glass, acryl glass) with special adapters and optical fibres. This enables incubations in closed systems in high water depths. The sensor spot can be used down to 4000m depth and has a pressure influence of ca. 1%/1000m. For read-out a suitable underwater device and an optical fibre with underwater connector is required.

Oxygen Probes
PyroScience robust oxygen probes are based on optical detection principles (proven REDFLASH technology) and can be used for precise bulk measurements in gas samples (oxygen gas), stirred liquids (dissolved oxygen, DO) and in respirometry of e.g. fish.

OXROB10-SUB

Robust oxygen probe
Stainless steel 10cm long, 3mm in diameter
With underwater SUB-connector (SUB)
No oxygen consumption
Optically isolated (OI)
Negligible drift, >3 years shelf time

OXROBSC-SUB

Robust screw cap oxygen probe
2 oxygen screw cap sensors
Stainless steel 10cm long, 4mm in diameter
Works in gas (%oxygen) and liquids (DO)
No oxygen consumption
Optically isolated (OI)

OXROB3-SUB

Robust oxygen probe
Stainless steel 3cm long, 3mm in diameter
With underwater SUB-connector (SUB)
No oxygen consumption
Optically isolated (OI)
Negligible drift, >3 years shelf time

Fibre-Optic Oxygen Sensors
The fibre-optic oxygen sensors from PyroScience feature no oxygen consumption, no stirring sensitivity, an extremely long shelf time, resistance to corrosive environments (e.g. seawater) and are suitable for multiple applications in gas, water and aqueous samples.

OXR430-UHS-SUB

Retractable fibre oxygen minisensor
430µm in diameter
Ultra-high speed response time (t90 < 0.3s)
With underwater SUB-connector (SUB)
No oxygen consumption
Negligible drift, >3 years shelf time

This fibre-optic minisensor consist of an optical fibre with a sensor tip diameter of 430 µm. Compared to a microsensor, this sensor is suited for slightly larger samples, long-term measurements and profiling applications with less spatial resolution requirements.

OXR430-HS-SUB

Retractable fibre oxygen minisensor
430µm in diameter
High speed response time (t90 < 0.8s)
With underwater SUB-connector (SUB)
No oxygen consumption
Negligible drift, >3 years shelf time

OXR430-OI-SUB

Retractable Fibre Oxygen Minisensor
430µm in diameter
Optically isolated (OI)
With underwater SUB-connector (SUB)
No oxygen consumption
Negligible drift, >3 years shelf time

This fibre-optic minisensor consist of an optical fibrr with a sensor tip diameter of 430 µm. Compared to a microsensor, this sensor is suited for slightly larger samples, long-term measurements and profiling applications with less spatial resolution requirements.

OXR430-SUB

Retractable Fibre Oxygen Minisensor
430µm in diameter
With underwater SUB-connector (SUB)
No oxygen consumption
Negligible drift, >3 years shelf time

OXR50-UHS-SUB

Retractable Fibre Oxygen Microsensor
230µm in diameter
50-70µm sharp sensor tip
Ultra-high speed response time (t90 < 0.3s)
With underwater SUB-connector (SUB)
No oxygen consumption

This fibre-optic microsensor consist of an optical fibre (230 µm) with a sensor tip diameter of approximately 50-70 µm. Microsensors are perfectly suited for measurements in small samples and for profile measurements (e.g. in sediments, soils, plant tissue, biofilm) with high spatial resolution (microprofiling).