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Dielectric Analyzers

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The LT-451 Dielectric Cure Monitor is a compact, versatile instrument designed for Research & Development, Quality Assurance/Quality Control, and Production applications involving thermoset materials--resins, composites, paints and coatings.

The wide 0.001 Hz – 100 KHz frequency range of the LT-451 allows frequency sweeping for studies of dielectric properties, and sensitivity to very high resistivity and ion viscosity (very low conductivity and loss factor). The associated thermocouple input allows correlation of temperature with cure rate and material properties.

The LT451 is available with one, two or four channels. Each channel consists of one dielectric sensor input and one thermocouple input. Instruments may be upgraded at any time with additional channels, and an external four-channel multiplexer is available. Dielectric inputs may be ordered for either mid-conductivity or high-conductivity ranges.

The CureView Data Acquisition Software has functions for defining cure monitoring parameters; data acquisition, analysis and recall; plotting and printing.

When used with either disposable or reuseable dielectric sensors, also available from Lambient Technologies, or the user’s own sensors, the LT-451 Dielectric Cure Monitor and CureView data acquisition software form a complete measurement system for studying dielectric material properties in all processing environments.

Applications
• Formulation, reaction rate and cure studies
• Diffusion studies
• Cure and process development
• Materials testing
• Statistical quality control
• Cure and process monitoring

Materials
• Epoxy
• Polyurethane
• Polyester
• Polystyrene
• Composites and laminates
• Bulk molding compound/Sheet molding compound
• Paints and coatings

Processing environments
• Ovens
• Presses
• Autoclaves
• Pultruders and extruders
• Batch reaction vessels

Specifications
Physical:
Dimensions: 17” W x 16” L x 5.25” H (43.2 cm W x 40.6 cm L x 13.3 cm H)
Weight: 10 lbs (4.5 Kg)

Electrical:
Power: 100 VAC – 240 VAC, 50/60 Hz autoswitching universal input, 4 A max

Measurement:
Excitation frequency range: 0.001 Hz to 100 KHz

Available excitation frequencies (Hz) :

0.001 0.0015 0.002 0.0025 0.003 0.0035 0.004 0.0045 0.005 0.006 0.007 0.008 0.009
0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 0.06 0.07 0.08 0.09
0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.6 0.7 0.8 0.9
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 6.0 7.0 8.0 9.0
10 15 20 25 30 35 40 45 50 60 70 80 90
100 150 200 250 300 350 400 450 500 600 700 800 900
1.0 K 1.5 K 2.0 K 2.5 K 3.0 K 3.5 K 4.0 K 4.5 K 5.0 K 6.0 K 7.0 K 8.0 K 9.0 K
10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K 60 K 70 K 80 K 90 K
100 K

 

Excitation amplitude: Sine wave, 1.0 V nominal (2.0 V peak-to-peak)

Base instrument accuracy:
0.001 Hz to 10 KHz: 0.1 dB gain, 0.1 deg phase
15 KHz to 100 KHz: 0.5 dB gain, 2.0 deg phase

Available interfaces: Mid-conductivity, High-conductivity

Inputs: 1-dielectric sensor, 1 thermocouple / channel
2-start/trigger
4-uncommitted analog input (±10 V range)

Outputs: 2-TTL/digital outputs

Dielectric sensor type: Interdigitated, parallel plate or single electrode for
Mid- or High- Conductivity interfaces

Thermocouple type: J standard, K by special order

Number of channels: 1 channel for LT-451A
2 channels for LT-451B
4 channels for LT-451C

Communications: RS-232C, USB with adapter

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