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

32-bit microprocessor with 16 MB of memory for 1.120.000 readings

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

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)

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

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.

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

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.

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

 Water Level

Sensor Absolute pressure sensor
Measurement Principle Capacitive with ceramic measuring 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


Water Temperature

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




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
Communication Interface RS485

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



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 caps starting from a 2" pipe diameter (optional)


Kevlar cable (standard)

Screened special measuring cable with RS485 interface (option)