Water Survey Tech

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Measuring data logger Dipper-APT absolute pressure

  • High-performance 32 bit measurement data collector with an absolute pressure sensor for measuring points prone to over-flooding and for swelling pressure measurements at great depths
  • Precise, long-life, stable ceramic-capacitive absolute pressure sensor, for measuring ranges up to max. 20 bar, NTC30 temperature sensor with an 0.3 °C (standard) or 0.1 °C (optional) accuracy
  • Sturdy, sleek Ø 22 mm stainless-steel case
  • XL ring memory for approximately 1.120.000 measurement data
  • Replaceable lithium batteries for about 8-10 years service life
  • Operation with notebook, tablet, PC, smartphone or tablet via Bluetooth (optional)
  • Air pressure compensation with additional Baro-Dipper and Software DEMASdb
  • Expandable with data transmission module SlimCom
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High-performance:
32-bit microprocessor with 16 MB of memory for 1.120.000 readings

Virtually maintenance free:
No battery replacement necessary, no running operational costs

Slim:
Installation using 1″ tube diameter (probe)

Accurate and reliable:

  • Water level: 0.05 % measurement accuracy (= 1 cm at 20 m measurement range)
  • A wide selection of ceramic capacitive absolute pressure transducers from 0.2 bar to 20 bar
  • Temperature: 0.3 °C (standard), 0.1 °C (optional)

Robust:
Stainless steel housing 1.4404 (standard) or 1.4539 (option) for use in extreme conditions (landfill sites, contaminated, brackish water etc.)

Flood-proof:
Pressure-tight housing (IP68) suitable for measuring points that are regularly flooded. The barometric pressure compensation is carried out in conjunction with a synchronised clocked Baro-Dipper.

Variable:
Suspension with kevlar or steel cable (standard), multi-core special measuring cable with the RS485 interface (optional).

User-friendly:
Two clever APPs are available for configuration and data read-out of the Dipper-APT. Operating software for beginners SEBAConfig (Windows) a user-friendly interface (Wizard) for various routine tasks. SEBAConfigApp (Android,iOS) combined with SEBA BlueCon 2 enables conveneient communiction via Bluetooth between a smartphone or tablet with a logger.

Modular:
Using the pluggable data transmission module SlimCom together with the Dipper-APT (special cable version) allows the system to converted into an online station.

  • Environmental monitoring in groundwater and surface water monitoring stations with risk of flooding, in addition to upland and lowland moors
  • Monitoring of swelling pressure stations and measuring points with large measuring range fluctuations
Operating software:

SEBAConfig (Windows)

SEBAConfigApp (Android, iOS)

Operating Unit:

HDA-Pro

HDA Tablet

Data readout:

Interface Converter (RS 485/USB)

BlueCon (Bluetooth®), RS485

External power supply:

Power Pack

Remote data transmission:

SlimCom

Measuring device protection:

SEBA Bearing Tube Closure with a safety lock

Evaluation software:

DEMASvis

Archiving Software:

DEMASdb

Parameters:

Water level [hPa], [cm], [m]

Sensor:

Absolute Pressure Sensor

Measurement principle:

Capacitive with ceramic measurement cell

Measuring range:

0-2 /1/4/5/20/40/100/200 m water column or according to specifications

Measuring accuracy:

±0.05 % FS

Long-term stability:

±0.1 %/ year

 

Parameters:

Water temperature [°C]

Sensor:

NTC30 with polynomial linearisation

Measurement principle:

NTC resistance

Measuring range:

-5 °C – +50 °C

Measuring accuracy:

0,3 °C Standard, 0,1 °C Option

 

Logger
Controller:

32Bit Flash controller with integrated WatchDog

RTC-IC Real-Time Clock

Memory capacity:

16 MB (= 1.120.000 readings)

Save interval:

30 s – 99 hours, standard, from 1s in quick-log mode, option

Channels:

max. 32 (e.g. water level, temperature, battery voltage)

Measurement routines:

Single value, average value, event clock, Delta mode, pumping test control

Communications
Interface:

RS485

Operation:

Interface Converter (RS 485/USB)

BlueCon (Bluetooth®)

Power supply:

2 x 3.6 V lithium AA size  batteries

Service Life:

> 8 years at 60 min intervals

 

Housing
Material:

1.4404 Standard, 1.4539 Option

Dimensions:

Ø 22 mm, length: 300 mm

Protection class:

IP68

 

Operating temperature:

-20 °C – +70 °C (non-freezing)

 

Hanging depth:

Up to 1000 m

 

Unit suspension:

With Kevlar cable: None (default)

With round cables:

Diameter-independant for SEBA caps starting from a 2″ pipe diameter (standard)

Diameter-dependent insert panels for SEBA capsstarting from a 2″ pipe diameter (optional)

 

Cable:

Kevlar cable (standard)

Screened special measuring cable with RS485 interface (option)

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