Water Survey Tech

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Relative Pressure probe DS(T) 22

  • Capacitive, ceramic, relative-pressure sensor for precise water level measurement in ground and surface water
  • Robust and slim design (22 mm diameter) made of stainless steel 1.4404 (standard), 1.4539 (optional)
  • High measuring accuracy (0.05% FS) and long-term stability (0.1%/year)
  • Wide availability of measuring ranges (0-2 /1 /4 /5 /20 /40 /100 /200/250 /300 m)
  • digital (RS485: SDI-12, Modbus, SHWP) or analog output (4-20mA)
  • Optional: Integrated temperature sensor (type DST 22)
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Robust, accurate and long-term stability:
The DS (T) 22 fulfills the the requirements of a modern pressure sensor. The pressure membrane is easy to clean and highly resistant. The capacitive measuring principle ensures a high accuracy (0.05%) and long-term stability (0.1% / year)

Uncomplicated:
The DS (T) 22 can be connected to all standard data loggers and controllers (PLCs). Either analog (4-20 mA with extended ESD protection according to IEC 61000-4 part 5, 0-1 V) or digital output signals (SHWP, MODBUS, SDI-12) can be ordered.

Saltwater-resistant:
For special applications, e.g. in coastal areas, brackish water or landfills, the DS (T) 22 is also available in high-grade stainless steel 1.4539 form.

Last but not least:
In addition to the measurement of the water level, upon request, water temperature can also be recorded with a high degree of accuracy: 0.1° C.

  • Monitoring of water level and water temperature
  • Surface waters: rivers, canals, lakes, reservoirs, retention basins, wadis
  • Groundwater: wells, field measurment sites, landfill and construction sites
  • Dams and reservoirs (leachate)
  • Tanks and shafts (filling level measurement)
  • Indirect flow measurement in conjunction with Venturi flumes, measurement weirs etc.
Parameters:

Water level [cm], [m]

Sensor:

Relative pressure probe

Measurement principle:

Capacitive with ceramic measuring cell

Measuring range:

0-2/0-4/0-5/0-10/0-20/0-30/0-40/0-50/0-70/0-100/0-200/0-250/0-300m water column

Measuring accuracy digital:

± 0.05% FS

Measuring accuracy analog:

± 0.1% FS

Long-term stability:

± 0.1% / year

 

Parameters:

Water temperature [°C], (optional)

Sensor:

PT1000 Sensor

Measurement principle:

resistiv

digital:

-5°C – +50°C

analog:

-5°C – +60°C

Measuring accuracy:

0.1°C

 

Housing
Material:

V4A standard 1.4404 stainless steel ,or high grade 1.4539 stainless steel (optional)

Dimensions:

Ø22mm x 182mm

Protection class:

IP68

 

 

Outputs:
Digital:

RS485: SHWP, Modbus, SDI-12

analogue:

0-1V, 4-20mA with extended ESD protection according to IEC 61000-4 part 5

 

Power supply:

7-30VDC

 

Connection:

Either with plug or open cable ends

 

Operating temperature:

-5°C – 60°C (non-freezing)

 

Cable:

Reinforced measuring cable with a pressure compensation line

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