Standard Melt Pressure Transmitters | Gefran & Dynisco Alternative | MP Series
MP Series Industrial Melt Pressure Transducer / Transmitter
The MP Series delivers standard, cost-effective pressure measurement for industrial plastics extrusion, polymer processing, and blow molding. Designed as a direct drop-in replacement for industry-standard sensors (including Gefran M Series and Dynisco PT460 Series), the MP Series features robust stainless steel construction, 80% internal shunt calibration, and flexible stem options to ensure precise melt pressure monitoring in standard production lines up to 400°C.
Key Highlights:
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Direct Drop-In Alternative: Full physical and electrical compatibility with legacy Gefran and Dynisco melt pressure models.
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Flexible Configurations: Available in rigid stem, flexible stem, and combined thermocouple/RTD temperature output configurations.
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Standard Industrial Signal: Choice of standard millivolt (mV/V) raw strain gauge output or amplified 4-20mA / 0-10V transmitter outputs.
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Built-in Calibration: Integrated 80% internal shunt calibration signal for quick zero and span adjustment.
Description
General Industrial Melt Measurement & Cross-Brand Compatibility
The MP Series Melt Pressure Transducer provides reliable and budget-conscious pressure measurement for plastic extruders, rubber processing equipment, and polymer melt lines. Engineered to operate continuously under elevated process temperatures up to 400°C, the MP Series utilizes proven strain gauge technology on a high-durability diaphragm to safeguard extrusion heads against overpressure events.
Retrofit Engineering: Easy Replacement for Gefran & Dynisco
Upgrading or replacing existing extrusion hardware is seamless. The MP Series features standard mounting threads (1/2-20 UNF or M18x1.5) and industry-standard connector pinouts. It serves as a direct cross-reference for widely used legacy series:
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Gefran Equivalents: Replaces Gefran M30, M31, M32, and M33 series.
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Dynisco Equivalents: Replaces Dynisco PT460, PT462, and PT463 series.
Whether you need a simple rigid stem sensor for barrel mounting or a flexible armor stem to isolate signal electronics from high temperatures, the MP Series delivers exact-fit mechanical and signal parity without expensive re-piping or panel rewiring.
(Note: For specialized eco-friendly, food/medical packaging, or mercury-free operations, please see our MPE Series. For high-precision digital auto-zeroing applications, explore the MPES Series.
Use this table to find the MP Series equivalent for your current sensor:
| Manufacturer | Competitor Series | MP Series Equivalent |
| Gefran | M0, M1, M2, M3 (e.g., M31, M32) | MP Series (Rigid/Flexible/Dual) |
| Dynisco | PT420, PT460, PT462, TPT463 | MP Series (Standard/Dual) |
| Terwin | Series 2000, 2000 Plus | MP Series |
| Gneuss | DA, DAI, DTA, DAI-T | MP Series |
| Barco | Series 400 | MP Series |
| Industrial Sensors (ISI) | Model 92, Model 93, Model 98 | MP Series |
Features
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Proven Strain Gauge Design: Delivers stable strain gauge signal conversion for standard melt extrusion applications.
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Direct Mechanical Drop-In: Standard 1/2-20 UNF or M18x1.5 mounting threads align perfectly with standard mounting holes.
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Versatile Mechanical Stems: Choose rigid stem only, rigid with flexible armoring, or dual pressure/temperature configurations.
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Standard Electrical Outputs: Available in 3.33 mV/V, 0-10V, 0-5V, or 2-wire 4-20mA transmitter outputs.
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Integrated 80% Shunt Calibration: Enables fast, one-touch zero and full-scale span verification with control instrumentation.
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High Temperature Operation: Diaphragm withstands process temperatures up to 400°C.
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Durable Diaphragm Coating: Standard coated stainless steel diaphragm resists mild abrasion and thermal fluid stresses.
Specification
| Parameter | Technical Specification |
| Pressure Ranges |
0-35 bar to 0-2000 bar (0-500 psi to 0-30,000 psi) |
| Accuracy Class |
+/- 0.5% FS (Standard); +/- 0.25% FS (Optional) |
| Output Signals |
3.33 mV/V, 4-20mA, 0-10V, 0-5V |
| Diaphragm Max Temperature |
400°C |
| Electronic Housing Temp |
-20°C to +85°C |
| Mounting Threads |
1/2-20 UNF-2A, M18x1.5 (Custom threads on request) |
| Internal Calibration |
80% Full Scale (Shunt Calibration) |
| Diaphragm Material |
15-5 PH Stainless Steel with anti-abrasion coating |
| Electrical Connector |
6-pin Bendix connector (compatible with standard 6-pin cables) |
| Thermocouple Options |
Optional Type J, K, or Pt100 RTD integrated sensor |
FAQ
Q1: Can the MP Series directly replace my existing Gefran or Dynisco melt pressure sensor? A: Yes. The MP Series is designed with identical mounting thread dimensions (such as 1/2-20 UNF), diaphragm lengths, and electrical pinouts, making it a direct drop-in replacement for common models like the Gefran M Series and Dynisco PT460 Series.
Q2: What is the difference between rigid stem and flexible stem models? A: Rigid stem models are ideal for direct mounting where space around the extrusion barrel is open. Flexible stem models add an armored extension hose between the process thread and the electronics housing, isolating the sensitive amplifier electronics from extreme heat.
Q3: How do I perform zero and span calibration on the MP Series? A: The MP Series features an internal 80% shunt calibration circuit. By triggering the calibration pins on the connector, the sensor outputs an exact 80% signal, allowing your indicator or PLC to calibrate the span easily without requiring external pressure sources.
Q4: Should I choose the MP Series or the MPE / MPES Series? A: The MP Series is best for standard industrial extrusion where a reliable, budget-friendly replacement sensor is needed. If your process requires mercury-free / food-grade compliance or temperatures up to 700°C, select the MPE Series. If you need digital remote AutoZero capabilities or SIL2 safety compliance, select the MPES Series.
