Stevens Water Monitoring Systems, Inc.

- Model Mini - Pressure Transducer with Integrated Logger

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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.

  • WATERLEVEL MEASUREMENT
    • 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
  • TEMPERATURE MEASUREMENT
    • Measuring range temperature : -25 °C - +70 °C (ice-free)
    • Accuracy temperature : ± 0.5 °C
    • Resolution temperature : 0.1 °C
  • ELECTRICAL
    • 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)
  • DATA LOGGER
    • 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
  • PHYSICAL
    • 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)
    • Weight : Communication unit (incl. batteries): approx. 0.410 kg
    • Pressure probe:approx. 0.300 kg
    • Dimensions : Communication unit: 400 mm L x 22 mm Ø
    • Pressure probe: 195 mm L x 22 mm Ø
  • OPERATING CONDITIONS
    • 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
    • Humidity : 100%
  • TYPE OF PROTECTION
    • Communication unit : IP67 (immersion depth max. 2 m duration of immersion max. 24 h)
    • Pressure probe : IP68
    • 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

  • 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
  • Easily equipped for data transmission using GSM/GPRS/SMS

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