Nortek Multi Parameter Probe: 08/2010

Nortek Multi Parameter Probe

The Nortek Multi Parameter Probe is a stand alone water-quality data collection system for use in harsh environments. Basically it is a combination of field-proven sensors packaged in a robust delrin and brass frame. Data collection and control is handled by a standard Campbell Scientific CR-800 datalogger, packaged in a sturdy PE-plastic pressure housing. This provides a proven stable platform for data collection and retrieval and allows for easy customisation. Data is logged internally or may be output in a NMEA compatible format over RS-232. Data can also be read from the instrument using the SDI-12 or Modbus protocols. When a GPRS modem is connected all data is automatically sent to an FTP server.

Supported sensors:
- CS547 Conductivity / Temperature
- OBS-3+ Optical Backscatter
- CS525 ISFET pH probe
- InsiteIG Dissolved Oxygen/Temperature
- Valeport miniCT (replaces the CS547)
- Ponsel OPTOD-Dissoved Oxygen Sensor
- Chelsea Instruments TriLux - Blue-algea, Chlorophyll, Turbidity
- Ponsel C4E - Conductivity / Temperature

Internal sensors:
- Pressure (optional)
- Internal temperature
Derived parameters:
- Salinity
- Dissolved oxygen in mg/l

Sunday 8 August 2010

The Parts are Here

Finally the parts are starting to come in.The pressure housing was originally planned to be made from Delrin, but after talking to our manufacturer we decided to have it made of High Density Polyethylene (PE). Especially the tube itself is much easier to purchase (it is stocked in large quantities as sewer pipes) and it is very sea-water resistant.

And it looks good !. The shining black tube and solid endcaps make a great pressure housing.
The frame is made of Stainless Steel, grade 316. It are basically four M8 threads kept together by three rings.
Unfortunately the stainless steel looks a bit 'industrial'. Weldings have a different colour and the rings still have the original material marks. A few layers of steel coating make it look much better...