Top

Steel Probe for Oxygen Monitoring in Normal Oxygen Range

Oxygen Dipping Probe DP-PSt7

The oxygen dipping probe type PSt7 is compatible with the multi-purpose oxygen meters Microx 4 & Microx 4 trace. The fiber end with attached oxygen sensor is covered by a stainless steel fitting so the probe can be put into semi-solid samples as well as in liquids without a problem. The probe has an outer diameter of 3 mm and a standard length of 10 cm, but also other lengths are available on request.

  • Excellent long-term stability
  • Pressure resistant (max. 5 bar)
  • Polarization-free
  • No membrane cleaning and replacement necessary
  • No electrolyte solution to replenish
  • Long shelf life

Applications

Long-term Measurements in Soil

PreSens offers dipping probes for oxygen measurement that does not consume oxygen. Due to their small dimensions they do not disturb the flow and mass-transport and consequently display the in-situ oxygen concentration. As minisensors from PreSens are long-term stable they can be implanted in soil for many years! With this new method the process of soil aeration, which is very critical for plant productivity, can be investigated.

Dr. Heidi Heuberger, Technical University of Munich, Munich, Germany


Environmental Research: Investigation in Soil Filters

Due to the small outer dimension and mechanical robustness the oxygen dipping probe offers the possibility to measure the oxygen content in-situ in columns filled with filter sands during the flow of sewage (see picture on the left). The results show that a lack of oxygen stops the nitrification process.


Technical

SpecificationsGaseous & Dissolved O2Dissolved O2
*after two-point calibration as described in the manual
Measurement range0 – 100 % O2
0 – 1000 hPa

0 – 45 mg/L

0 – 1400 µmol/L
Limit of detection0.03 % oxygen15 ppb
Resolution

± 0.01 % O2 at 1  % O2
± 0.05 % O2 at 20.9 % O2

± 0.005 mg/L at  0.4mg/L

± 0.025 mg/L at 9.06 mg/L
Accuracy at + 20 °C*± 0.05 % O2 or ± 3 % rel.
Measurement temperature rangefrom 0 to + 50 °C
Response time (t90)< 6 sec.< 40 sec.
Properties
CompatibilityAqueous solutions, ethanol, methanol
No cross-sensitivity

pH 1 – 14
CO2, H2S, SO2
Ionic species

Cross-sensitivity

Organic solvents, such as acetone, toluene, chloroform or methylene chloride
Chlorine gas

Sterilization procedureEthylene oxide (EtO)
Cleaning procedure

3 % H2O2
Ethanol
Soap solution

CalibrationTwo-point calibration with oxygen-free environment (nitrogen, sodium sulfite)and air-saturated environment
Storage stability60 months provided the sensor material is stored in the dark at room temperature

Related products

Stand-alone fiber optic oxygen meter Microx 4

Microx 4

The Microx 4 is a completely stand-alone, portable fiber…

More
Stand-alone fiber optic trace oxygen meter Microx 4 trace

Microx 4 trace

The Microx 4 trace is a completely stand-alone, portable…

More
OXY-1 ST, compact fiber optic oxygen meter

OXY-1 ST

This extremely small and lightweight oxygen meter can be…

More
Trace oxygen meter OXY-1 ST trace

OXY-1 ST trace

The OXY-1 ST trace is very compact and can be set up almost…

More
Automated Micromanipulator AM

Automated Micromanipulator AM

The Automated Micromanipulator is specifically designed for…

More
Screens of PreSens Profiling Studio software for measurement control with the Automated Micromanipulator

PreSens Profiling Studio

This software enables control of the Automated…

More
OXY-4 ST (G2) 4-channel oxygen meter

OXY-4 ST (G2)

This multi-channel oxygen meter can be used with…

More
OXY-4 ST trace (G2) 4-channel trace oxygen meter

OXY-4 ST trace (G2)

The OXY-4 ST trace can be used with O2 microsensors in…

More
OXY-10 ST (G2) 10-channel oxygen meter

OXY-10 ST (G2)

This multi-channel oxygen meter can be used with…

More
OXY-10 ST trace 10-channel trace oxygen meter

OXY-10 ST trace (G2)

The OXY-10 ST trace can be used with oxygen microsensors in…

More

Presens TV

Watch tutorials, webinars and informative videos about PreSens optical sensor systems.

All videos