Laboratory hot plate GHP 721-500 mm

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Overview
The GHP 721 guarded hot plate system is a cabinet instrument for stationary measurement of thermal conductivity of thick specimens. Integrated single board computer (Windows), optional Lambda software and a high-resolution color touch display provide system control, data acquisition and evaluation. NETZSCH TAURUS Instruments GmbH focuses on instruments for thermal conductivity measurement of building, construction and insulating materials.

Main features

• Guarded Hot Plate for absolute, steady-state thermal conductivity measurements
• Single- or two-sample measurement modes
• Integrated SBC (Windows) and Lambda software for control and evaluation
• High-resolution color touch display
• Motorized lifting of the upper plate for easy sample handling
• Digital measurement of sample thickness and contact pressure
• Various heater plate sizes (e.g. 100×100 mm to 300×300 mm) and test areas up to 500×500 mm
• Fully insulated test chamber
• Interfaces: RS232, USB, Gigabit Ethernet for peripherals and PC connection
• Integrated cooling/heating control for cold and hot plates

Standards / Method
The system is designed according to established standards for guarded hot plate and related methods (ISO 8302, ASTM C177, EN and DIN standards). It supports measurements with a well defined temperature difference ΔT between hot and cold plates and minimizes lateral heat losses via the guard ring.

Accessories / Options

• Sample adapters for 1-sample or 2-sample mode
• Reference materials for calibration and quality control
• Choice of heater plate dimensions and shapes (square/rectangular)
• Extended interface and PC connectivity packages

Technical data (excerpt)

• Product series / model: GHP 721
• Thermal conductivity range λ: approx. 0.005 – 2.0 W/(m·K) depending on material and thickness
• Test area / sample size: up to 500 mm × 500 mm (depending on heater plate)
• Heater plate sizes: e.g. 100×100 mm to 300×300 mm
• Sample thickness: 1-sample: 15–200 mm; 2-sample: 2×15–100 mm
• Temperature ranges: cold plate −15 °C to 60 °C; hot plate −5 °C to 70 °C
• Dimensions (HxBxT): 186 × 75 × 75 cm
• Power supply: 110–230 V, 50/60 Hz
• Weight: approx. 192 kg
• Interfaces: RS232, USB, Gigabit Ethernet

Application note
The Guarded Hot Plate is the absolute, stationary reference method for determining thermal conductivity of thick specimens. Typical application questions include comparison of insulation materials, optimization of cryogenic tank insulation and assessment of thermal bridges.