Description
It is the waterproof version of the Oxybase probe.
The range is 0 – 100 % O2, with a detection limit of 0.03 % O2. These probes are waterproof and can be submerged completely. Furthermore, their stainless-steel housing has an additional plastic cover which offers protection against environmental impacts. This makes the probes ideally suited for long-term outdoor use in e. g. environmental research applications or aquaculture.
These probes have RS485 as digital interface (OXYBase® WR-RS485-SW = PreSens proprietary, OXYBase® WR-RS485M-SW = Modbus RTU) and are connected directly to the control unit. A serial communication protocol is offered for data exchange between the OXYBase® and a PC or other host unit. The probes are available with various cable lengths, and their sensor is integrated in a removable sensor cap (OEC). The sensor is not autoclavable.
Specifications
| Gaseous & Dissolved O2 | Dissolved O2 | |
| Measurement range | 0 – 50 % Vol. O2, 0 – 500 hPa 0 – 100 % Vol. O2, 0 – 1000 hPa after new calibration |
0-22.5 mg/L 0 – 45 mg/L afer calibration |
| Limit of detection | 0.03 % O2, 0.3 hPa | 0.020 mg/L |
| Resolution | 0.2 % O2 at 20.9 % O2 | 0.04 mg/L at 9 mg/L |
| Response time (t90) | < 10 sec. | < 30 sec. |
| Compatibility | Aqueous solutions, ethanol, methanol, cleaning agents containing ClO2 at room temperature | |
| No cross-sensitivity to | pH 1 – 14, CO2, H2S, SO2, ionic species | |
| Cross-sensitivity to | Organic solvents, such as acetone, toluene, chloroform or methylene chloride, Chlorine gas | |
| Cleaning procedure | 3 % H2O2, acidic agents (HCl, H2SO4) max. 4 – 5 % Cleaning agents containing ClO2 at room temperature |
|
| Calibration | Two-point calibration in oxygen-free (e. g. nitrogen 5.0, 1 % sodium sulfite solution) and air-saturated environment (20.9 % oxygen, air-saturated waster) | |
| Sampling rate | 1 sec. up to 9 min. 59 sec. | |
| Pressure resistance | 3 bar | |
| Operation temperature range | Optimal: 0 °C to + 40 °C, Max.: – 10 °C to + 70 °C | |
| Temperature sensor | NTC | |
| Temperature accuracy | <1 °C | |
| Power supply | 5 V +/- 0.5 V | |
| Power consumption | 1 W | |
| Weight | 252 g with a 5 m cable | |
| Dimensions | Probe length: 166 mm, diameter: 21 mm at cable gland | |
