Description

The XP279C is a medium-sized heat flux sensor for performing reliable measurements under controlled conditions. In the world of heat flux measurement, a 10mm square sensor is often considered the “sweet spot” for general-purpose engineering. While still relatively small, the XP279C sensor has an increased surface area that is 5 times the size of the XM279C. It is large enough to provide a more stable, averaged reading of a surface, but small enough to fit on most industrial and commercial components. Also, at 10mm square it is roughly the size of a fingernail, it is a common size for “wearable” thermal research. Available with 1m lead and TEG connector for connection to a DLOG data logger for standalone heat flux monitoring. The pairing is ideal for wearable heat flux monitoring.

Features

• Ultra-high resolution of thermal energies and temperature differences.
• Low invasiveness and thickness.
• Models with connector compatible with all gSKIN®DLOG Data Loggers.
• All sensors with conductive heat flux calibration cohering to ISO 8301.
• Applications: R&D, thermal optimization, energy efficiency, industrial monitoring of thermal properties.

Applications

1. Building Physics & Envelope Testing – Measuring heat loss through vacuum insulation panels (VIPs), high-performance glazing, or thin wall sections.
2. Battery Thermal Management (EVs) – Monitoring the heat generated by individual lithium-ion battery cells (like 21700 or 4680 cells) during rapid charging/discharging cycles.
3. Medical & Human Physiology Research – Measuring Non-Invasive Core Body Temperature or skin heat loss in extreme environments (diving, space suits, or athletic performance).

Specifications

Product: gSKIN® XP
Detector Type: Thermoelectric
Surface Material (Sensing Area): Aluminum
Article Number: A-044577
Sensing Dimensions: 10 x 10 x 0.5mm
Heat Flux Range Min / Max: -150 / 150kW/m²
Noise Equivalent Heat Flux per area / absolute: 0.073W/m² / 7.3µW (Experimentally evaluated values under optimal steady state conditions).
Heat Flux Resolution per area with gSKIN® DLOG / absolute: 0.09W/m² / 9.0µW (Guaranteed minimum heat flux resolution using the gSKIN® DLOG-4219).
Temperature Difference Resolution: ~140µK
Response Time (0-95%): 0.7 Secs
Min. /Avg. Sensitivity (S): 10μV/(W/m²) /20μV/(W/m²) (Only a reference point).
Max. Compressive Force when clamped: < 10Kgf
Electrical Resistance: < 150 Ohms
Thermal Conductivity: ∼1.2W/(m*K)
Linearity with Power: ±1%
Operating Temperature Range Min/Max: -50°C / 150°C
Calibration Accuracy: ±3%
Calibration Temperature Range Min/Max: -30°C / 70°C (Conductive heat flux calibration cohering to the ISO8301 standard with mean temperature of 22.5°C).
Flexprint Length: 5cm
Temperature Dependence of S: 0.25%/°C
Homogeneity: ±1% (The sensitivity increases or decreases as the temperature goes above or below 22.5°C). Position dependent signal change across sensing area.
Termination: 1m cable and TEG Connector