Description

We developed a compact solution which offers the possibility to use a battery solution while high frequent remote data transmission. In the past maintenance intensive solar panels or mains supply took place, from now on a secure data transmission is realized by batteries. With a battery pack up to 9000 web-based data transmissions can be carried out. This means an hourly remote data transmission at a minute measurement interval over a period of one year. Thus, the GPRS Datalogger type 255-EB is very often used in measuring points for surface water in order to realize a continuous and frequent measured value transmission, also as solution for completely redundant stations.

Alternatively, the GPRS Datalogger type 255-EB can also be used in regular groundwater wells. With an hourly measurement and daily data transmission, the device will provide a battery lifetime of at least 10 years.

For HT Dataloggers, you do not need to check the humidity in the unit or to replace dry cartridges regularly. Maintenance and operating costs that can be saved. Thanks to a proven, self-developed filter system that has been in use for more than 20 years in different climate zones guarantees the relative pressure measurement with all its advantages.

Data transmission in the standard version takes place via GPRS transmission to a FTP server. For security reasons, the transmission can also take place with SSL encryption. In the event of a short battery capacity or in case of an alarm when limit values ​​are exceeded, warning messages can be sent.

Technical Data

General Data

Dimensions

Ø49mm, Length: 420 mm

Housing material

Stainless Steel; POM - against net coverage;

User interface

RS 232; can be addressed via serial and USB interface

Measuring interval

user definable from 1 second to 99 days

Power supply

Standard:      3x Lithium / Size: D (mono)
                        for 1 year at hourly data transmission
                        or 10 years at daily data transmission
Alternatively: 3x Alkaline / Size: D (mono)
                        for 4 years at daily data transmission

Interfaces for probes

Standard: 1 input for connecting a 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

  • Designed for very long battery life
  • Maintenance free - no desiccant / dry cartridges required
  • Direct installation in gauge pipes from 2 inch
  • 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

  • Use in surface water with frequent remote data transmission
  • Continuous monitoring of water quality
  • Measuring and monitoring of channels and rivers
  • Monitoring of groundwater wells with long battery life
  • For monitoring and alarming in case of saltwater intrusion