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Dielectric Analyzers
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
Micro Press
The LTP-350 MicroPress is a miniature thermal pneumatic press designed for the curing of SMC, BMC, epoxies, polyesters, polystyrenes, polyurethanes, silicones, laminates and other polymeric materials. Providing a portable, easily operated platform to reproduce the time-temperature-pressure processing profiles of most polymers, the LTP-350 MicroPress has independent temperature control of both upper and lower platens and can operate in either isothermal or ramp-and-hold modes. The heating temperature range is ambient to 350 Degrees C (660 Degrees F), and maximum applied force is 2000 pounds (909 Kg). Platen area is 3.0” x 3.0” (75 cm x 75 cm), and the LTP-350 MicroPress dimensions are shown in the figure below.
The LTP-350 MicroPress can be controlled manually or with the Lambient Technologies CureView software. When used with any of the Lambient Technologies dielectric sensors, the LTP-350 MicroPress becomes a complete testing station for dielectric cure studies.
Specifications
Cylinder diameter: 5” (125 cm)
Maximum input air pressure: 120 psi
Maximum applied force: 2000 pounds (909 Kg)
Pneumatic connection: Nylon or polyurethane tubing 10 mm O.D., 1.5 mm wall
thickness, rated for 8.25 bar (120 psi)
Stroke (max. platen separation) : 4.5” (11.4 cm) without CeramicombTM sensor plate,
approximately 3.25 “ (8.9 cm) with sensor plate
Platen dimensions: 3” x 3” (75 cm x 75 cm)
Press dimensions (H x W x D): 28.3” x 17.4” x 19.0 “ (71.9 cm x 44.2 cm x 48.3 cm)
Press weight: 80 lbs. (36 Kg)
Water connection: None
Cooling: Ambient cooling or optional cooling plate with circulating water
Working temperature: ambient to 350 ?C (660 ?F)
Thermocouples: Type J, one in each platen
Total heater power: 450 W (225 W/platen)
Press voltage: 120 or 240 VAC, 50-60 Hz (specify mains voltage when ordering)
Press current: 4.1 A at 120 VAC, 2.0 at 220 VAC
Controller voltage: 120 or 240 VAC, 50-60 Hz (specify mains voltage when ordering)
Controller communications: RS-485, USB with adapter
Features:
Independent isothermal temperature mode for each platen
Ramp and hold mode
Temperature controller detachable for convenient servicing.
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