Transmitters for heat flux monitoring

GS44H (A/B/C/D/E)

A general purpose bipolar range transmitter that designed to be used with 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 section for more details.

GS44

GS44H

Sensors

Hukseflux HFP01 heat flux sensor

HFP01 heat flux sensor is frequently specified for building performance monitoring studies, that is through walls and building envelopes. The total thermal resistance is kept small by using a ceramics-plastic composite body. The sensor is very robust and stable. It is suitable for long term use on one location as well as repeated installation when a measuring system is used at multiple locations.

HFP01 measures heat flux through the object in which it is incorporated or on which it is mounted, in W/m2. The sensor in HFP01 is a thermopile. This thermopile measures the temperature difference across the ceramics-plastic composite body of HFP01. A thermopile is a passive sensor; it does not require power. Using HFP01 is easy. The heat flux in W/m2 is calculated by dividing the HFP01 output, a small voltage, by the sensitivity. The sensitivity is provided with HFP01 on its calibration certificate. A typical measurement location is equipped with 2 or more sensors.

HFP01

HFP01

Accessories

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

WBG

Transmitter Specification

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


GS44H used with the Hukseflux HFP01 heat sensor:

(EU range can be used if required)

Location of installation Comment Comment Flux max
W/m2
Sensitivity
uV/W/m2
Output
mV
GS44HFX
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/
outdoor
1400 60 84 +/-100mV GS44HE

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

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

Documentation

Common to all transmitters

Gen II Quick Start Instructions

Specific to this transmitter

GS42H/GS44H User Instructions