Partech (Electronics) Ltd.

- Model 840 - Loop Powered Dissolved Oxygen Transmitter

From

0

The 840 Transmitter has been designed to provide accurate, highly reliable measurements in difficult, high-fouling applications. The specifically designed sensor utilises a rugged, 100 micron membrane in combination with a unique electrolyte to provide excellent long term stability without the need for sensor replenishment or replacement. The result is amazing – the 840 is so stable that it can measure accurately for years with practically no attention (service intervals of five years have been reported). Maintenance is as simple as wiping the membrane clean and checking the calibration from time to time. If it should ever be necessary to replace the membrane, this can be done quickly, easily and at very little cost.

Image

When combined with the EasyCal, calibration is carried out in 2 minutes with the probe in water. As the sensor does not need to acclimatise in air, errors do not occur by hurried calibrations. As with all aspects of the 840 Transmitter the calibration routine is extremely simple and involves no tables or complicated software features.

To make installation as easy as possible and to help achieve the best possible results we recommend using the the Partech FlexTech mounting shaft with the integral self -cleaning flexible coupling. This places the sensor approximately 300 mm below the surface away from the surface effects of rain, sunshine and fouling. The flexible joint in the mounting shaft allows the sensor to move, providing an anti-fouling and anti-ragging action.

  • Activated Sludge Plant
  • River Monitoring
  • Aquaculture

  • Long Sensor Life
  • Low Maintenance
  • Easy to use

Physical

  • Dimensions (hxwxd):
    • Transmitter: 121, 121, 60 mm
    • Sensor: 58 mm Diameter x 56 mm Long
  • Weight :
    • Transmitter: 1 kg
    • Sensor: 0.4 kg (inc 5 metres of cable)
  • Protection Class :
    • Transmitter: IP65
    • Sensor: IP68
  • Enclosure Material :
    • Transmitter: ABS
    • Sensor: Polyoxymethylene (POM)
  • Cable Entry : 2x PG9
  • Cable Length : 10 metres standard

Electrical :

  • Power Supply : 15 to 35 VDC Loop Power

Environmental Data :

  • Operating Temperature : Transmitter: -20 to 60ºC
  • Sensor: 0 to 50ºC
  • Storage Temperature : Transmitter: -20 to 60ºC
  • Sensor: -20 to 50ºC
  • Location : Indoor/Outdoor

User Interface :

  • Display : 3 1/2 Digit
  • Setup : via Dip Switches
  • Units of Measurement : mg/l, ppm, %Sat

Output Signals :

  • Analogue Output : 4-20 mA
  • Max load 50 ohm @ 15VDC, 1000 ohm @ 35VDC
  • Relay Outputs : None

Measurement Characteristics

  • Principal of Operation : Galvanic Cell, Self Polarising
  • Accuracy : Better than +/- 2% FSD
  • Resolution : Better than +/- 0.5% FSD
  • Response Time : 90% of End Point in 2 minutes
  • Minimum Flowrate : Dependent on DO and Temperature, typically 1 cm/sec

Sensor Range :

  • Minimum Range : 0 to 5 mg/l or 50 %Sat
  • Maximum Range : 0 to 40 mg/l or 400 %Sat

Customer reviews

No reviews were found for Partech - Model 840 - Loop Powered Dissolved Oxygen Transmitter. Be the first to review!