DatasheetDynisco PT420 Series
The Dynisco PT420 Series includes high-accuracy melt pressure sensors for applications requiring simple installation, high repeatability and long-term reliability. The sensors provide an industry-standard 3.33 mV/V output signal and are designed to work with most common pressure indicators and readout instruments. Thanks to its robust design, the PT420 Series is especially suitable for precise pressure measurement in extrusion and plastics processing applications.
The PT420 pressure sensors offer an accuracy of ±0.25 % FSO, making them a high-accuracy option within Dynisco melt pressure sensors. The standard wetted parts are made of DyMax® coated 15-5 PH stainless steel. This design supports high resistance, excellent thermal stability and reliable repeatability during operation.
The series is available for pressure ranges from 0…500 psi to 0…30,000 psi. The sensor features a four-arm bonded foil Wheatstone bridge strain gauge, internal 80 % shunt calibration and a 1/2-20 UNF process thread for installation in standard transducer mounting holes. Optional thermocouple or RTD configurations are available to provide melt temperature measurement in addition to pressure measurement.
| Type | Melt pressure sensor for high-accuracy pressure measurements |
|---|---|
| Series | Dynisco PT420 Series |
| Application | Melt pressure measurement in extrusion, plastics processing and industrial high-temperature processes |
| Output signal | 3.33 mV/V ±2.0 % |
| Input voltage | 10 VDC recommended, 12 VDC maximum |
| Pressure ranges | 0…500 psi to 0…30,000 psi |
| Accuracy | ±0.25 % FSO combined error, including linearity, repeatability and hysteresis |
| Accuracy for 500, 750 and 1,000 psi ranges | ±0.5 % FSO |
| Repeatability | ±0.1 % FSO; ±0.2 % FSO for 500, 750 and 1,000 psi ranges |
| Configuration | Four-arm bonded foil Wheatstone bridge strain gauge |
| Bridge resistance input | 345 Ω minimum |
| Bridge resistance output | 350 Ω ±10 % |
| Over pressure | 2 × FSO or 35,000 psi, whichever is less |
| Zero balance adjustment range | ±5 % FSO |
| Insulation resistance | 1000 MΩ at 50 VDC |
| Internal shunt calibration | 80 % FSO ±0.5 % |
| Max. diaphragm temperature | 750 °F / 400 °C |
| Diaphragm zero shift due to temperature change | 15 psi / 100 °F typical or 27 psi / 100 °C |
| Electronics operating temperature | 250 °F / 121 °C |
| Electronics zero shift due to temperature change | ±0.01 % FS / °F max. or ±0.02 % FS / °C max. |
| Span shift due to temperature change | ±0.005 % FS / °F max. or ±0.01 % FS / °C max. |
| Mounting torque | 500 inch/lbs max. |
| Standard wetted parts | DyMax® coated 15-5 PH stainless steel |
| Process connection | 1/2-20 UNF thread |
| Electrical connection | 8-pin Bendix connector |
| Optional temperature measurement | Optional thermocouple or RTD configurations available to provide melt temperature measurement |
| Key features | High accuracy, DyMax® coated wetted parts, proven sensor design, excellent thermal stability, internal 80 % shunt calibration |
