Description

The GPRS Datalogger type 255 amortizes the investment in the shortest time for all groundwater wells that have to be monitored by continuous measurement of water level and quality.

The GPRS Datalogger type 255 automatically transmits the recorded level & quality data to an internet server after a selectable interval. By using the GPRS technology, the GPRS Datalogger does not require standby- time nor synchronization of the integrated clock. With this modern technology many GPRS Dataloggers can access the internet server at the same time for data upload.

Additionally, the device can be equipped with an alarm management system which, when user-defined limits are reached, sends an SMS message, sends an e-mail or sends a notification to the server for further automated processing.

Technical Data

General Data

Dimensions

Ø49mm, Length: 380 mm

Housing material

Stainless Steel

User interface

RS 232; can be addressed via serial and USB interface

Measuring interval

user definable from 1 second to 99 days

Power supply

3 pieces Alkaline batteries, Size: C; sufficient for 2 years (daily data transmission);

Interfaces for probes

Standard: 1 input for connecting a HT probe

Optional: additional input for a second HT probe

Data Transmission

Transmission frequency

Dualband 900 / 1800 MHz- Optional: Quadband with 850/1900 MHz

Cellular network

Standard: 2G / Optional: 3G

Transfer protocol

Standard: FTP, by setting also with SSL encryption

Alarm Management

• 2 limit values can be defined for each parameter

• Possibility to autom. switching of measuring and transmission interval

• Low battery warning

• Warning message via SMS / eMail and status on web server

Environmental conditions

Operating temperature

-20°C to +65°C / expandable to - 35 °C

Protection class

IP68; flood-proofed until 1m water column

Connectable measuring probes

  • Pressure Sensor 550W

    Technical Data

    Measuring principle:Relative pressure measurement
    Dimensions:Ø22 x 125 mm
    Material:Stainless Steel 316 Ti
    Measuring ranges
    Water Level:selectable from 5… 300 m water column
    Temperature:0 … +50°C / optional: 0…+70°C
    Accuracy
    Water Level:<0.05% of selected range (= 1cm at 20m range)
    Temperature:< 0.1°C

  • Combi probe 550-LTC

    Technical Data

    Dimensions:Ø22 x 265 mm
    Material:Stainless Steel 316Ti / optional: Titanium
    Measuring range
    Water Level:selectable from 5… 300m water column
    Temperature:0 … +50°C / optional: 0…+70°C
    Conductivity:0 … 200.000 μS/ cm incl. automatic range switching
    Accuracy
    Water Level:< 0.05% of selected range (= 1cm at 20m range)
    Temperature:< 0.1°C
    Conductivity:< 0.5% of measured value, min. 2 μS/cm (0,002 mS/cm)

  • Combi probe 550-PHL

    Technical Data

    Dimensions:Ø48 x 400mm
    Material:Stainless Steel 316Ti
    Measuring ranges
    Water Level:selectable from 5… 100m water column
    Temperature:0..+50°C
    pH:0..14 pH
    Accuracy
    Water Level:< 0.05% of selected range
    Temperature:< 0.1°C
    pH:< 0.02 pH

  • PH Probe 550-PT

    Technical Data

    Dimensions:Ø29.5 x 250 mm
    Material:Stainless Steel 316Ti
    Measuring ranges
    pH:0..14 pH
    Temperature:0..+50°C
    Accuracy
    pH:< 0.02 pH
    Temperature:< 0.1°C

  • Multiparameter Probe 550-MP1

    Technical Data

    Dimensions:Ø48 x 400mm
    Material:Stainless Steel 1.4571
    Measuring range
    Water Level:selectable from 5… 100m water column
    Temperature:0..+50°C
    Conductivity:0 … 200.000 μS/ cm incl. automatic range switching
    pH:0..14 pH
    ORP (optional):± 2000 mV
    Accuracy
    Water Level:< 0.05% of selected range (= 1cm at 20m range)
    Temperature:< 0.1°C
    Conductivity:< 0.5% of measured value, min. 2 μS/cm (0,002 mS/cm)
    pH:< 0.02 pH
    ORP (optional):< 10 mV

  • Turbidity Probe 550TR

    Technical Data

    Dimensions:Ø29.5 x 220 mm
    Material:Stainless Steel 316Ti

    Measuring range
    selectable:

    0-   15 NTU
    0- 150 NTU
    0- 1500 NTU

    Accuracy:< 1% of selected range

  • Multiparameter Probe 550MP-V

    Technical Data

    Dimensions:Ø60 x 400mm
    Material:Stainless Steel 316Ti
    Measuring range
    Water Level:selectable from 5… 50 m water column
    Temperature:0..+50°C / Optional: 0..+70°C
    Conductivity:0 … 200.000 μS/ cm incl. automatic range switching
    Dissolved Oxygen:0..20 mg/l
    pH:0..14 pH
    ORP (optional):± 2000 mV
    Messgenauigkeit
    Water Level:< 0.05% of selected range (= 1cm at 20m range)
    Temperature:< 0.1°C
    Conductivity:< 0.5% of measured value, min. 2 μS/cm (0.002 mS/cm)
    Dissolved Oxygen:< 1% of measured value
    pH:< 0.02 pH
    ORP (optional):< 10 mV

Characteristics

  • Maintenance free - no desiccant / dry cartridges required
  • Direct installation in groundwater wells from 2 inch
  • Check measurements by a Water Level Meter are possible without conversion or removal from 2 inch wells
  • No synchronization of clock and standby times
  • Cost-effective data transmission via GPRS technology
  • Non-volatile flash memory for up to approx. 190,000 records
  • Compact and robust design made of high quality stainless steel
  • Easy installation and operation

Applications

  • For efficient, continuous monitoring of groundwater wells
  • For monitoring and alarming in case of saltwater intrusion
  • If warnings prevent damage when defined limits are reached
  • For monitoring and alarming of pollutants into groundwater
  • For remote monitoring of pumping tests
  • In difficult accessible areas
  • Periodic control tours are being extended considerably