High Temperature Melt Pressure Sensor/Transmitter PT133

High-temperature melt pressure sensors/transmitters are industrial measurement devices designed specifically for high-temperature, high-pressure, high-viscosity, and corrosive medium working conditions. Their core function is to continuously monitor the pressure parameters of melts (e.g., plastics, rubber, molten metals, chemical fiber raw materials), providing critical data support for production process control, quality stability, and equipment safety. They are widely used in industries such as rubber and plastic, metallurgy, and chemical fiber.

1.Core Features And Functions

1) Adaptability to Extreme Working Conditions (Core Feature)

• High-Temperature Resistance: With a wide operating temperature range and made of high-temperature-resistant materials, they can directly contact high-temperature melts without damage.
• High-Pressure And Viscosity Resistance: Boasting a broad measurement range, they withstand impact pressure from melt flow. Optimized probe structures (e.g., flush diaphragm, wedge-shaped diaphragm designs) prevent adhesion and clogging by high-viscosity melts, reducing measurement errors.
• Corrosion and Interference Resistance: Medium-contacting parts are made of corrosion-resistant alloys or ceramic coatings to resist erosion by acidic, alkaline, or organic solvent-based melts. Built-in electromagnetic shielding modules counter grid and vibration interference (suitable for high-frequency vibrations in extruders, injection molding machines, etc.).

2) Precise Measurement and Stable Output

• High Precision And Repeatability: Offers measurement accuracy of ±0.1%FS to ±0.25%FS, linearity of ≤±0.2%FS, and repeatability of ≤±0.1%FS—ensuring data consistency for precision production needs.
• Temperature Compensation: Integrates multi-point temperature compensation algorithms to offset the impact of temperature drift on measurement accuracy in high-temperature environments, maintaining stable data across a wide temperature range.
• Flexible Signal Output: Supports industrial standard signals, including analog (4-20mA, 0-10V, 0-5V) and digital (HART, RS485-Modbus, Profibus). It can be directly connected to PLCs, DCS systems, and industrial computers for easy automation integration.

3) Structural And Installation Advantages

• Integrated/Modular Design: Compact in size with customizable probe lengths (to fit the barrel/die depths of different equipment). Flexible installation methods (threaded: M14/M18/M22; flange; clamp) require no complex equipment modifications.
• Overload and Explosion Protection: Equipped with 150%–200%FS overload protection to prevent damage from sudden pressure changes. Some models comply with theEx d II CT4explosion-proof standard, making them suitable for flammable/explosive melt processing (e.g., solvent-based rubber production).

4) Additional Functions (High-End Models)

• Real-Time Display: Built-in LCD/LED display for intuitive pressure reading without relying on control systems.
• Alarm Output: Set upper/lower pressure thresholds—triggers switching alarms (e.g., relay output) when exceeded to link with equipment shutdown or adjustment.
• Remote Calibration: Supports remote calibration via the HART protocol, eliminating the need for sensor disassembly and reducing maintenance difficulty.

2. Core Industry Pain Points Addressed

In high-temperature melt scenarios, traditional pressure sensors (e.g., ordinary strain-gauge, ceramic sensors) suffer frominability to withstand high temperatures, easy clogging, precision drift, and short lifespan. This product specifically resolves these issues:

• Working Condition Adaptation: Solves burnout/aging of traditional sensors due to poor high-temperature resistance, adapting to high-temperature environments like extruder dies, injection molding machine barrels, and molten steel pipelines.
• Measurement Precision: Eliminates "data drift and large errors" caused by high-viscosity melt adhesion and pressure fluctuations—ensuring uniform product thickness (e.g., plastic films/pipes) and consistent density (e.g., rubber products).
• Equipment Safety: Monitors melt pressure in real time to prevent overflow, die rupture, or pipeline leakage (from excessive pressure) and material blockages/product shortages (from low pressure).
• Maintenance Costs: Corrosion and clogging resistance reduce frequent disassembly, cleaning, and replacement—lowering downtime and maintenance costs (traditional sensors require 1–2 monthly checks; this product extends intervals to 3–12 months).
• Automation Integration: Standardized signal output is compatible with existing industrial control systems, resolving signal incompatibility and enabling automated production upgrades.

3. User Experience Highlights

• Convenient Installation: Multiple methods fit different equipment interfaces; no complex tools are needed, and installation/debugging takes 10–30 minutes. The flush probe design prevents melt residue for easy cleaning.
• Stable and Reliable: Mean Time Between Failures (MTBF) ≥20,000 hours with minimal data fluctuation (≤±0.1%FS/year), reducing frequent calibration/adjustment workload.
• User-Friendly Operation: Analog signals are plug-and-play; digital signals support remote parameter configuration. Models with displays allow on-site reading without connecting to computers/control cabinets, facilitating inspections.
• Strong Compatibility: Works with mainstream PLCs (Siemens, Mitsubishi, Rockwell) and DCS systems—no additional signal converters are needed, cutting integration costs.
• Durable: Overload protection, vibration resistance, and corrosion resistance extend service life—maintaining stable performance in harsh conditions and reducing replacement costs.

4. Typical Application Scenarios

1) Rubber And Plastic Industry (Core Application)

• Extruders: Monitor melt pressure in dies/barrels during PE/PVC/PP pipe extrusion, plastic film blowing, and rubber seal extrusion to control speed and product thickness.
• Injection Molding Machines: Track barrel/nozzle pressure during molding to avoid defects (shortages, flash, sink marks) and ensure precision.
• Vulcanizers: Control pressure during rubber vulcanization for uniform curing and improved product strength/elasticity.

2) Chemical Fiber Industry

• Spinning Machines: Monitor melt pressure at spinnerets for polyester/nylon/spandex spinning—controlling filament diameter uniformity and avoiding breakage/fuzz.
• PET Melt Transportation: Monitor pressure in PET melt pipelines to ensure stable delivery to spinning components.

3) Metallurgical Industry

• High-Temperature Molten Metals: Track pressure in transport pipelines/casting molds for molten steel/aluminum/copper to prevent overflow or insufficient casting.
• Refractory Material Molding: Control pressure in ceramic slurry/glass melt equipment to ensure uniform product density.

4) Food and Pharmaceutical Industries

• High-Temperature Food Processing: Monitor pressure during boiling/transportation of chocolate, syrup, or jam to ensure safety and texture.
• Pharmaceutical Excipient Processing: Control pressure of molten pharmaceutical resins/suppository bases, complying with GMP standards.

5) Other Special Scenarios

• Reactors: Monitor pressure in high-temperature/high-pressure reactors (e.g., chemical synthesis, polymer polymerization).
• High-Temperature Coatings/Adhesives: Control transportation pressure of molten coatings/adhesives for uniform application.

Summary

The core value of high-temperature melt pressure sensors/transmitters lies inprecise, stable measurement under extreme conditions. By addressing pressure monitoring pain points for high-temperature, high-pressure, and high-viscosity media, they not only ensure production safety but also improve product consistency—making them key equipment for automated/intelligent production in rubber/plastic, chemical fiber, and metallurgy industries. Their flexible installation, strong compatibility, and long service life also reduce comprehensive costs and boost production efficiency for users.（来自飞书知识问答｜https://ask.feishu.cn）