The OTT Orpheus Mini is an integrated pressure sensor and datalogger for level measurement in surface and groundwater applications. It features a robust ceramic measuring cell for long term accuracy, and its built in datalogger manages and stores all measurements at user-programmable intervals.
OTT Orpheus Mini is equipped with a rugged, ceramic-capacitive measuring cell and a precise temperature sensor. A data logger, which can be configured individually, stores and manages the monitored measured values in a 4 MB non-volatile memory (corresponds to approx. 500,000 measured values). The power supply of the Orpheus Mini as well as the connection for downloading data and start-up are provided by the communication unit.
The infrared interface allows the data to be conveniently read out or transferred from the device with a laptop. A well structured, intuitive operating program with all the necessary functions for data output and export, configuration and calibration is supplied.
- Easy installation in observation wells of 1″ diameter and larger by adapter plates or suspension bracket
- Power supply can optionally be provided by Lithium or Alkaline batteries
- The batteries can easily be changed on-site
- Longitudinally stable pressure probe cable by Cevlar core
- Potted, hermetically sealed pressure probe
- Saltwater resistant casing material
|Measuring ranges||0 - 4 m, 10 m, 20 m, 40 m, 100 m|
|Accuracy, pressure sensor||± 0.05 % FS|
|Resolution, pressure sensor||0.01 % FS|
|Measuring range temperature||-25 °C - +70 °C (ice-free)|
|Accuracy temperature||± 0.5 °C|
|Resolution temperature||0.1 °C|
|Power supply||3 x 1.5 V LR6-cells Alkaline- or Lithium-type|
|Lifetime (at 1 h reading interval)||
With Lithium batteries: min. 5 years
With Alkaline batteries: min. 1.5 years (high quality battery types)
|Memory||4 MB non-volatile|
|Number of measured values||approx. 500,000|
|Reading interval||1 second to 24 hours|
|Storage interval||1 second to 24 hours|
|Logging type - selectable||Linear, logarithmic - free progammable (logging table) for pumping tests, event triggered delta data logging|
|System length||1.5 m to 200 m, ±1%, ±5 cm (cable length incl. communication unit/pressure probe)|
|Material||ABS, POM, 904 L (DIN 1.4539)|
Communication unit (incl. batteries): approx. 0.410 kg
Pressure probe:approx. 0.300 kg
Communication unit: 400 mm L x 22 mm Ø
Pressure probe: 195 mm L x 22 mm Ø
|Temperature-compensated working range||-5 °C to +45 °C (ice-free)|
|Storage temperature||-40 °C to +85 °C|
|Operating temperature||-20 °C to +70 °C|
Type of protection
|Communication unit||IP67 (immersion depth max. 2 m duration of immersion max. 24 h)|
|EMV limits||IEC61326/EN61326 are compliant with EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN 61000-4-6, EN 550222 class B|
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