Intelligent oxygen sensor for dissolved oxygen with digital interface and analog output

The sensor’s latest optical technology enables precise measurement with long-term stability in fish breeding, sewage treatment plants, as well as other water and wastewater technology applications. The integrated analog and digital interface allows easy connection to field devices and process control systems.

The JUMO digiLine O-DO S10 is an intelligent sensor for measuring dissolved oxygen. The oxygen measurement takes place in accordance with the optical measuring principle of luminescence quenching according to ASTM D888-05. This results in the following benefits for the user:

• No replacement of electrolytes
• No polarization voltage required
• No minimum inflow
• Greater calibration intervals due to low drift behavior
• Reliable measurement with long-term stability

The measured value for dissolved oxygen is automatically compensated to account for the temperature influence. In addition, the measured value can be compensated by the oxygen sensor with regard to the determining factors air pressure and salinity (if necessary using external sensors).

The JUMO digiLine O-DO S10 has 2 interfaces that can be used to transfer the measured value from the sensor to the measuring device/automation device. Communication takes place using a digital interface via RS485 Modbus RTU protocol or as an analog signal via the two-wire current interface (4 to 20 mA).

Configuration, parametrization, and calibration data is stored in the electronic components in the sensor of the JUMO digiLine O-DO S10. Sensor-specific specifications and measuring point information can also be stored and called up. In addition, a log book with the last 10 successful calibrations is available; this provides the user with an overview of the previous calibration history.

Furthermore, the sensor is equipped with the capability for self-diagnostics, in order to determine possible malfunctions. The information is output as a warning or error message.

The sensor is streamlined and has a robust construction. The sensor cap is easy to replace if it becomes worn. The sensor body of the JUMO digiLine O-DO S10 consists of PVC material, which allows it to be used in fresh water and salt water. A fixed cable with a 5-pole M12 connector is mounted on the sensor. The electrical connection to a measuring or automation device is quick and easy to establish.

2 connection options are available for mounting in a fitting – the Rp 1 thread on the sensor shaft or a mounting set G 1 available as accessories.

Features

• Output of measured value for oxygen in % Sat, % Vol, ppm, hPa pO2
• Suitable for fresh and salt water
• Immediately ready for use due to factory calibration
• 2 connection options:
  • RS485 Modbus RTU interface
  • Analog output 4 to 20 mA (two-wire current interface)
• 3 operating modes:
  • JUMO digiLine Betrieb operation on a digiLine master (JUMO AQUIS touch S/P)
  • Modbus operation on the JUMO mTRON T and JUMO AQUIS 500 RS
  • Analog operation
• Secure transmission of measured values via the digital interface
• Easy, time-saving bus cabling
• Plug and Play installation on the JUMO AQUIS touch S/P
• Sensor calibration on a PC with storage of the calibration data in the sensor electronics

Applications

• Drinking water monitoring
• Protection of water bodies
• Fish breeding (fresh and salt water)
• Municipal and industrial sewage treatment plants
• General water and wastewater engineering
• Universities and teaching institutions

 

Measuring Range	0 to 20 mg / l eller 0 to 200% sat.
Measuring accuracy (25 °C)	±1 %
Operating temperature	-5 to +50 °C
Maximum pressure	0 to 5 bar (relative)
Temperature measurement	NTC (22 kOhm)
Temperature compensation	Automatic
Response time	t90 % < 60 s
Diameter	Sensor shaft: 20 mm, threaded shaft: 30 mm
Materials in contact with the medium	PVC, PC
Resistances	CO₂, H₂S, SO₂, ethylene oxide and gamma sterilization
Process connection	Rp 1″
Output	4 to 20 mA in two-wire technology
Interface	RS485 with Modbus RTU
Special features	Precise measurement even at low concentrations; self-diagnostic functions; JUMO digiLine
Application areas	Water and wastewater treatment (e.g. sewage treatment plants, fish breeding, aquaristics, and aquaponics); surface water; universities and educational institutions