Overview
The LAMBDA Thermal Conductivity Meter is a compact and user-friendly instrument for accurate determination of thermal conductivity, thermal diffusivity and specific heat capacity in liquids, gels and powders. Based on the transient hot-wire (THW) method according to ASTM D7896-19, it delivers fast and reliable measurements across a wide temperature range for both laboratory and field applications.
Fast and accurate thermal conductivity analysis
LAMBDA is designed for rapid characterization of thermal properties in a wide variety of sample types, including heat transfer fluids, immersion cooling liquids, lubricants, gels, and nanoparticle dispersions. The transient hot-wire measurement principle minimizes the influence of convection, enabling highly repeatable and accurate results even for challenging fluid samples.
Only a small sample volume is required, allowing efficient testing during research, product development, quality control, and routine laboratory analysis. Measurements are performed automatically within short intervals, providing thermal conductivity data together with temperature information and estimated values for thermal diffusivity and specific heat capacity.
The instrument can be operated as a standalone system or connected to a PC via USB or RS-232 for automated measurement, data recording, and temperature control. Its robust stainless-steel sensor and broad operating range make LAMBDA suitable for both laboratory environments and on-site investigations.
Key features
- Measurement of thermal conductivity, thermal diffusivity, and specific heat capacity
- Based on the Transient Hot-Wire (THW) method according to ASTM D7896-19
- Suitable for liquids, gels, pastes, powders, and nanoparticle dispersions
- High measurement accuracy with excellent repeatability
- Fast measurement cycles with minimal sample preparation
- Requires only a small sample volume
- Wide operating temperature range for versatile laboratory applications
- Integrated temperature measurement during testing
- Compatible with external temperature control systems
- USB and RS-232 connectivity for PC-based operation and data logging
- Robust stainless-steel sensor design for laboratory and field use
- Ideal for research, product development, quality control, and process monitoring
Specifications
| Suitable samples | Fluids, gels, powders |
|---|---|
| Sample quantity | approx. 40 ml |
| Test standard | conforms to ASTM D7896-19 based on ASTM D2717 |
| Measuring range | 10 to 2000 mW/(m*K) |
| Repeatability limit | 1 % |
| Temperature range – sensor | -50°C to 300°C |
| Temperature accuracy | ± 0.1 K |
| Temperature measurement | PT100 |
| Pressure range – sensor | 0 to 35 bar (optional HP version up to 500 bar available) |
| Measuring time | approx. 30 s |
| Connectivity | RS-232 interface (adaptable to USB) |
| Display | LCD (4 x 16 digits) |
| Dimensions electronic unit (L x W x H) | 370 x 235 x 150 mm |
| Weight – system | approx. 2.9 kg |
| Power supply | 110 – 240 VAC, 50/60 Hz |
| Energy consumption | 15 W |
| Outer dimensions sample vessel (screw-on cup) | D = 38 mm (equals inner diameter of thermostat jacket); L = 110 mm (equals immersion depth into thermostat) |
| Optional accessories | Dry-block thermostat for automatic testing above RT Fluid circulator w/ extra vessel for testing below RT |
Fast, precise, easy to handle: LAMBDA is the perfect tool for the thermodynamic analysis of your fluids: