Transmitters with inputs for CO2 monitoring, e.g. in incubators


The GD43E transmitter is designed for users who wish to monitor temperature, temperature/humidity and an input from an external sensor e.g. CO2, O2 etc.

When used with one of the Vaisala probes listed below, for example, the transmitter provides a compact, comprehensive and cost effective monitoring solution for incubators.

The Vaisala CO2 sensors require an 24VDC external power supply in order to be used with the GD43E.

The GD43 is battery operated with an endurance of > 2 years based on a 5 minute transmit interval.

Connectors are included. If you require sensors, please order them separately.

Wired sockets for:


The GenII M series retains the standard GenII transmitter specification and adds 12,000 readings of built-in backup memory. The memory is used in continuous overwrite mode. This means many weeks of data can be held in the transmitter, depending on the number of channels in use.



Sensors - order separately


WBG Wall bracket docking kit

This kit enables fitment of the transmitter's built-in wall bracket to difficult or uneven surfaces. The kit provides additional docking security.

The following products are supported:

  • All GD, GC, GL and GS series transmitters
  • RP250GD repeater and RC250 receiver


Common GenII Transmitter Specification

RF specification: EN300-220
RF power: 10mW
Environment specification  
  Compliant to EN300-220: -10 to +55°C
  Actual: -30 to +65°C
  Humidity: 100% non condensing
Environmental rating: IP40
Dimensions (footprint): 78 x 41mm
Transmission interval range: 1 sec to 4 hours
Indicator (red LED): transmit active/on/off
Control switch (concealed): test mode / hibernate
Antenna socket: SMA

Transmitter Specification

Model(s) Sensors Range Resolution Accuracy
GD43E external RH (RHT10E)

external temperature (RHT10E)

-40 to +120°C

±2% (10 to 90%RH)
±4% (0 to 100%RH)
±0.4°C (+5 to +40°C)
±1.0°C (-20 to +80°C)
1 x voltage / current 0-100mV
0-1V DC
0-10V DC
0-20mA DC
4-20mA DC
1 x external thermistor temperature -50 to 150°C 0.05°C (-5 to +75°C)
0.1°C (-25 to +100°C)
0.2°C (-40 to +125°C)
±0.1°C (-5 to +75°C)
±0.2°C (-25 to +100°C)
±0.4°C (-40 to +125°C)
1 x voltage / current as GD43E
1 x external thermistor temperature as GD43E
GD43E external RH (EplusE EE68)

external temperature (part EplusE EE68)

-40 to 80°C
  ± 2% (10 to 90%RH)
± 3% (0 to 100%RH)
0.6°C (0 to+40°C)
1.0°C (-40 to +80°C)
1 x voltage / current as GD43E
1 x external thermistor temperature as GD43E


Common to all transmitters

Gen II Quick Start Instructions

Specific to this family of transmitters


GD43 Datasheet
GenII M Series transmitters with backup memory