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GDT Multiple modem - Front
GDT Multiple modem
GDT Multiple modem in the field
GDT Multiple modem - Front
GDT Multiple modem
GDT Multiple modem in the field

GDT Multiple


The Global Data Transmitter Multiple is a modem with 6 ports, made to connect to the e-SENSE sensors, Divers and/or SDI-12 Smart Sensoring product line.

  • Always a complete data set
  • Smart while efficient
  • 6 ports for sensors
  • Secure data transmission
  • 3GGPRS, UMTS or SDI-12 version
  • Internal barometric and temperature sensor
  • Part of the Eijkelkamp Smart Sensoring concept


The Global Data Transmitter Multiple (GDT-M) modem is designed to communicate with sensors (e+ loggers and/or Divers and/or SDI-12 sensors) in the field and transmit sensor data in a secure way to our customers anywhere in the world. The modem has 6 sensor ports, allowing it to connect to up to 6 sensors. 

The modem comes complete with barometer and mounting brackets.

Note: SIM card subscription (11.62.81/82) and battery-pack are not included. 

Available variations

Depending on your preferred technology for data transfer, the modem is available in the following versions:

  • 11.32.01 GDT-Multiple GPRS. Telemetry via e-mail
  • 11.32.02 GDT-Multiple UMTS. Telemetry via UMTS 
  • 11.32.03 GDT-Multiple GPRS SDI-12. Telemetry via e-mail


  • Telemetry
  • Datalogging

When installed correctly, the environmental protection is IP67. Warranty is 2 years. 


GDT Multiple
Alarm type high-low alarm, fluctuation alarm, low battery alarm
Battery life time at least 3 years
Data plug type USB
Message mode Web portal, e-mail, SMS alarm, other
Operating temperature -4°F - 122°F (-20°C - 50°C)
Data transfer telemetric
Power supply battery, line voltage
Registration type logging
Voltage 7.2 V (battery); external DC 5.5 - 18 volt
Weight 2.65 lbs (1.2 kg)
Kory Enneking

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Need advice choosing the right product for your application? Our specialist Kory is happy to help.