Digital analyzer THW-01LNG

oilgasportable

Overview
The THW-01LNG is a benchtop digital instrument for absolute measurement of thermal conductivity of fluids using the Transient Hot-Wire technique. Measurements are automatic and provide rapid results without requiring calibration or reference samples.

Method
Following the transient hot-wire technique, the instrument determines thermal conductivity by recording the temporal temperature rise of a thin wire after a step voltage is applied. Current heats the wire, creating a line heat source in the fluid; two wires of identical type but different lengths remove end effects. The system records resistance rise over time, converts it to temperature rise, applies small corrections (wire heat capacity, variable fluid properties, cell boundaries) and derives thermal conductivity from the slope of temperature vs time.

THW-01LNG advantages

• Digital, automated measurement
• Benchtop form factor for laboratory use
• High accuracy (nominal 1 %) and 0.5 % repeatability
• Fast acquisition (data points from 0.01 to 1 s)
• No calibration sample required (absolute method)
• Windows 10 control software (AccuMeasurement / AccuAnalysis)

Applications and Market sectors

• Liquids
• Nanofluids
• Gases
• Natural gas mixtures
• Beverages
• Pharmaceutical fluids
• Oils
• EV fluids

Specifications

• Technique: Transient Hot-Wire
• Sample volume: 50 mL
• Sample thickness range: 0.5 to 20 mm
• Temperature: ambient or requested
• Pressure: ambient or requested
• Thermal conductivity range: 0.1 to 0.7 W/(m·K)
• Accuracy: 1 %
• Repeatability: 0.5 %
• Operating system: Windows 10
• Connectivity: USB-A to USB-B
• Model components and options: A) Ambient pressure sensor with two oxidized Ta wires, 25 µm diameter; glass vessel for liquid measurements up to 50 °C or metal container (not a pressure vessel) for measurements up to 200 °C (chiller/recirculator not included). B) Automatic electronic bridge with ARM CPU for output control and data processing. C) Laptop controlling the setup with AccuMeasurement (measurement) and AccuAnalysis (data analysis) software.