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Transmitters with inputs for heat flux / pressure / strain

Sensors are not included and must be ordered separately.
GS44H (A/B/C/D/E) A general purpose bipolar range transmitter that can be used with pressure transducers, strain gauge or the HukseFlux HFP01 heat flux plate. All four inputs have the same range. This range is hardware configured at the time of manufacture. The GS44H will have a suffix letter corresponding to the range - see the specification tab for more details.


Common 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
Battery endurance: up to 5 years (interval set to 5 minutes) (less for GL-70 and GS40 series)
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

Range Type
(GS44H suffix letter)
Range Accuracy
All 0.1% of range
GS44HA +/-5mV 10uV 2.5uV
GS44HB +/10mV 20uV 5uV
GS44HC +/-20mV 40uV 10uV
GS44HD +/-50mV 100uV 25uV
GS44HE +/-100mV 200uV 50uV

GS-44H used with the Hukseflux HFP01 heat sensor: (EU range can be used if required)

Location of installation Comment Comment Flux max
Voltage range
GS44H variant
Shaded No solar radiation Indoor 100 60 6 +/-10mV GS44HB
Shaded north wall Diffuse solar radiation Outdoor 300 60 18 +/-20mV GS44HC
Anywhere All solar Indoor/
1400 60 84 +/-100mV GS44HE

Eltek can also supply: GS44HA (±5mV range) and GS44HD (±50mV range) as above.


Common to all transmitters
Gen II Quick Start Instructions

Specific to this family of transmitters
GS44/44E/44H Connectors and links