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Eltek 451L Huxseflux kit

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The Eltek 451 Hukseflux kit is a custom designed set of instrumentation that has been specifically put together to enable building specialists to undertake in-situ measurement of building envelope thermal resistance and thermal transmittance according to ISO 9869, ASTM C1046 and ASTM 1155 standards.

The 451 data logger is supplied as standard with two Hukseflux sensors for spatial averaging, two air temperature sensors, and a power supply which is recommended for extended period monitoring exercises.

Product Features

  • Document downloads

Instrument product options

Overview

Features

HFP01 heat flux sensors

The HFP01 measures the heat that flows through the object in which it is incorporated or on which it is mounted. The actual sensor in HFP01 is a thermopile. This thermopile measures the differential temperature across the ceramics-plastic composite body of HFP01. Working completely passive, HFP01 generates a small output voltage proportional to the local heat flux.

To calculate the heat flux , the output voltage recorded by the Eltek 451 data logger from the HFP01 sensor is divided by the sensitivity; a constant that is supplied with each individual instrument.

The HFP01 sensors can be used for in-situ measurement of building envelope thermal resistance (R-value) and thermal transmittance (H-value) according to ISO 9869, ASTM C1046 and ASTM 1155 standards.

Traceability of calibration is to the "guarded hot plate" of National Physical Laboratory (NPL) of the UK, according to ISO 8302 and ASTM C177.

Important note: To download data from the Eltek 451L data logger this can either be undertaken by BSRIA Instrument Solution on request prior to the equipments return to our laboratories, or using Eltek's Darca software supplied ready loaded onto a laptop PC.

Technical

HFP01 heat flux sensors

Nominal sensitivity 50 μV/Wm2

Temperature range -30 to +70°C

Range -2000 to +2000 W/m2

Calibration traceability NPL, ISO 8302 / ASTM C177

Expected typical accuracy (12 hr totals) within +5%/-5% on walls

Plate thickness 5 mm

Plate diameter 80 mm

Weight without cable 200 g

Eltek 451L logger

General 4 channel data logger configured with 2 channels for temperature (thermistor) and 2 channels +/- 10mv (Huxserflux heat flux sensor)

Dimensions (mm) H 120, W 180, D 62

Memory Approximately 40,000 readings (each comprising of 4 measurements channels)

Downloads

PDF

Hukseflux HFP01 user manual

  • Technical Document
  • PDF file
  • 325 KB
Download
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