Description
The OXYBase® WR-RS485-AO combines an optical sensor type PSt3 and electro-optical module in one probe. The sensor has a maximum measurement range of 0 – 100 % O2, and a detection limit of 0.03 % O2 / 20 ppb. As it is waterproof, this probe is ideally suited for e. g. measurements in aquaculture or environmental research projects. OXYBase® is connected directly to the control unit, uses RS485 as digital interface (PreSens proprietary) and has 4 – 20 mA analog output. A serial communication protocol is offered for data exchange between the OXYBase® and a PC or other host unit. For initial operation and adjustment of the 4 – 20 mA output the PreSens EOM-STS software can be used. The probe is available with various cable lengths, and its sensor is integrated in a removable sensor cap (OEC), which can easily be exchanged. These exchange caps are offered in different versions for certain demands (fast response time, safe for food applications, for aggressive environments, USP Class VI compatible). The sensor is not autoclavable.
| Gaseous & Dissolved O2 | Dissolved O2 | |
| Measurement range | 0 – 100 % Vol. O2, 0 – 500 hPa | 0 – 45 mg/L |
| Limit of detection | 0.03 % O2, 0.3 hPa | 0.020 mg/L |
| Resolution | 0.1 % 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 | |
| Operation temperature range | Optimal: 0 °C to + 50 °C, Max.: – 40 °C to + 90 °C | |
| Temperature sensor | NTC | |
| Temperature accuracy | <1 °C | |
| Power supply | 7 – 30 V | |
| Power consumption | 1 W | |
| Dimensions | Probe length: 135 mm, diameter: 12 mm; various cable lengths | |
| Dimensions | 4 – 20 mA | |
