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Pressure sensors, monitors, controls.


Automated pressure and flow control systems, pressure gauge calibration systems, pressure regulators, including custom units. Systems allow user-defined multiple target pressures, holding times, and pressurization rates from vacuum to 60,000 psi.


Melt pressure transducers/transmitters feature nonmercury transfer medium and ceramic impregnated diaphragm. TFH high-accuracy transducers are for critical measurements. TFO standard transducers are for general-purpose measurements. TFJ transducers have temperature sensor (thermocouple, RTD) output. TFO4 transducer has integrated amplifier output (4-20 mA, 0-10 v, etc.). Model 2604 Eurotherm melt pressure controller has I/O selectability, alarming, retransmission, built-in transducer power supply, and communication capability. The2408i Eurotherm process indicator has built-in transducer power supply, alarming outputs, and communication ability.

Pressure controllers and indicators for extrusion and injection molding.



Pressure transducers and transmitters from PMT Product Group. Pressure ranges from 3 to 5000 psi with various input/output configurations. Millivolt, voltage, and 4-20 mA outputs available on standard products. Complete media isolation achieved on Model 88 series transmitter with stainless-steel wetted parts.


Model AN2401 1/8-DIN panel-mounted pressure controller with 20 measurements/ sec and [+ or -] 0.01% accuracy. Isolated input and outputs; five-digit, high-visibility vacuum-fluorescent display; push-button setup, calibration, and operation; and programmable filter. Optional dual-relay setpoints, analog output with independent scaling, and RS232 serial interface.


Model 3300 1/32-DIN temperature/pressure controller with digital interface. Also Windows-based software for trending, monitoring, and remote adjustment of the 3300 controllers.


Pressure transmitters for 0-40-in. [H.sub.2]O to 3000 psi. Process connections as small as 0.5 in. NPT available, as are ANSI flanges.

Also level transmitters and switches. Ultrasonic, capacitance, pressure, conductance, float and displacer, and sounding reel types.


Melt-pressure transducers, pressure indicators, and controllers for extrusion or injection molding:

* PT420 high-accuracy pressure transducer for critical pressure and temperature measurements with [+ or -] 0.25% accuracy to 30,000 psi.

* PT460 economical transducer with [+ or -] 0.5% accuracy from 500 to 30,000 psi.

* PT4624-A amplified-output pressure transmitter produces a 4-20 mA signal for long-distance transmission without noise interference and easier interfacing with PLCs or extruder control systems. New Auto-Zero functionality is provided.

* SPX series pressure transmitters for hazardous or explosive areas, including fiber spinning and melt extrusion.

* PT460XL enhanced pressure transducers with extra-thick sensing diaphragm for improved abrasion and corrosion resistance.

* PT 130 hydraulic-pressure transducer with contoured sensing diaphragm for accuracy, repeatability, and fatigue strength.

* PT465XL nozzle-pressure transducer with flexible armored cable for longer life, 8-mil-thick flush diaphragm, and accurate measurements to 30,000 psi and 750 F.

* PT449 direct-cavity pressure transduce mounts flush within the cavity and measures pressures up to 20,000 psi and 600 F melt temperatures.

* Mechanical/electronic melt-pressure gauges provide local indication on extruders, easy readability, and resistance to vibration.

* ATC770 with self-tuning algorithm is fully compatible with a wide variety of process transmitters and a combination of jumpers and menu options. Selection of readout options.

* UPR700 pressure/process indicator is field configurable and programmable. Two process variables, such as melt temperature and pressure, can be shown on digital display indicators.

* High-performance 1390 and 1391 indicators. The 1390 accepts direct input from 350-ohm strain-gauge pressure transducers, while the 1391 accepts voltage and current inputs. Both models feature 1/8-DIN horizontal design, two alarms and optional RS-485 interface.


Complete line of discrete signal-loop controllers and system products for pressure control and monitoring. New Extrusion Master 3 (EM-3) pressure controller for complex extrusion simplifies start-up and shutdown process. Desired speeds and pressures are entered and the control system automatically performs the process.


Offers digital-readout pressure indicators and sensors. Series F6700 and F6750 digital displays accept 4-20 mA signal from their series F6301 pressure sensors. The five-digit displays can be scaled to most engineering units and are easily programmed using front-panel buttons or available programming software. For specific requirements each display accepts up to three optional plug-in cards that offer a choice of analog outputs, digital communications and set-point alarms.

F6301 pressure sensors designed for high signal output are unaffected by shock, vibration or mounting position. Units provide long-term stability and repeatability and are available in a wide range of pressures.

High-pressure-rated RTD thermometer probes are precision platinum units with maximum temperature rating of 300 F and maximum pressure rating of 7500 psi. Can be inserted directly into hydraulic or fluid material stream and offer 3-sec response. The 1/8-NPT body threads eliminate need for special fittings and come in insertion lengths from 1 to 3.5 in.

DTM-100 panel-mount temperature readout offers 3/4-in. LCD display visible in ambient lighting. A high-impact plastic case mount is 1/4-DIN. Standard 0-10 v recorder output available at rear terminals. Unit can be wired for 120 or 240 v, 50 or 60 Hz without internal modification.


Sensors and instrumentation for extrusion and injection machine process control. Sensors include melt-pressure transducers, transmitters and linear position sensors. Offers include temperature controllers, universal input process indicators, DIN rail mounted integrated PID controllers and solid-state relays. All products manufactured in ISO certified facilities.


Melt-pressure/temperature transducers designed with a solid steel force rod have pressure ranges from 250 to 45,000 psi, accuracies of 0.5%, stem lengths from 3.5 to 18 in., and thermocouple capability. Also offers full line of standard or armored cables.

Gentran Tuffgage is a complete melt-pressure gauge ruggedly designed that requires no external power. The cost-effective units include options such as alarms, stem length, flexible stem, pressure ranges and thermocouple power. Units require little maintenance and use no grease.

Analog and digital melt-pressure/ temperature indicators in 1/4-DIN size available with alarms and various shunt calibration setpoints. Easy-to-read units are industry compatible with any two-arm, 350-ohm Wheatstone bridge pressure transducer.


Line of melt-pressure transducers features all-welded stainless-steel housing and a hard-faced chrome-plated measuring diaphragm on an all-stainless-steel stem for protection from abrasive and adhesive effects of the melt. These bonded strain gate units are offered in pressure ranges from 0500 through 0-20,000 psig. Also featured are an integral calibration signal, choice of 0.5% FSO or 1.0% FSO accuracies for maximum economy, and variety of stem and capillary tubing lengths.

Spike series injection molding pressure transmitter engineered for high cyclic applications or applications susceptible to pressure spikes where zero stability is a concern.


Microprocessor-based pressure controllers for extrusion aid throughput stabilization by closed-loop feedback control of pressure at the die. The plug-in 1/4-DIN modules feature large LED readout, plus separate LCD display to allow calibration and mode changes. Single-channel and differential-pressure control forms available. Differential-pressure control is useful with melt pumps to increase metering accuracy and control continuous screen changers.


Complete range of industrial transducers and transmitters for monitoring gauge and absolute pressure, differential pressure, vacuum, load, weight, force, torque, displacement, and acceleration. Amplifiers, signal conditioners, and digital readouts also available. Features include miniature size, high temperature, submersibility, flush diaphragm, and high-overload tolerance. Rugged all welded stainless-steel construction and a variety of pressure ports and mounting options.

Ouptut available in mv/v, 0-5 or 0-10 vdc, or 4-20 mA. Pressure ranges from 10-in [H.sub.2]O to 60,000 psi, load ranges from 25 grams to 3 million lb.


Flush-mount piezoelectric quartz transducer for measuring cavity pressure in injection molding. Unit's 1-mm in-cavity sensor is said to be the smallest of its kind. Unisens 4-mm sensor offers uniform sensitivity between sensors, allowing mold changeovers without recalibrating. Direct and indirect measuring systems available. Behind-the-pin sensors match strain gauge dimensions and pricing. Single-wire conductors replace conventional coaxial cables on several units.

Line of electronic signal conditioners interfaces transducers to injection machine controls. Charge amplifiers control molding machine or provide analog outputs for monitoring. Specialized data-acquisition software for injection molding.


Pressure sensors for demanding environments in ranges of 0-0.5 to 0-10,000 psi. Units measure absolute, vented-gauge, or sealed-gauge pressure.


SP series melt-pressure transducers feature low-volume capillary system to ensure thermal stability, while minimizing risk of process-fluid contamination. Features provide accuracy and fast response to temperature changes, while making the transducer less susceptible to flow erosion. Units reportedly last up to 10 times longer than conventional sensors.


Pressure sensors and transducers for liquid and gas systems measure positive, negative, and absolute gauge pressures. Outputs include millivolt, amplified voltages, and current-loop signals.

Options include meters, controllers, signal conditioners, cable, connectors, and tubing.


MicroAir precision ultra low-pressure regulators allow for automatic control of OD, ID and wall of extruded tubing. A model for high-speed operation &bump and tapered tubing also available. Units compliment company's UltraGage ultrasonic measurement and control systems for pipe and tubing.


Gauge-type resin pressure control offers infrared port communication with a high-speed sampling and control time for quality control of extruded products.


Extrusion pressure transducers and transmitters from Terwin Instruments. Products utilize a patented stainless-steel "dual-tube" measurement technique. Instruments do not incorporate a mercury liquid-filled capillary tube measurement mechanism.


All-welded, all-titanium, miniature flush-mount (3/8-in. diam.) and 10-32 port pressure transducers for hydraulic, weighing, and general-purpose measurement from 25 to 5000 psi. Companion 3 1/2- and 41/2-digit displays provided in panel-mount DPMs and bar graphs.


Line of pressure transmitters includes rugged, low-cost sensors for injection molding ram-pressure control (models 340, 347); fast-response differential pressure sensors for container leak testing (models 374, 376); and pressure isolators to allow remote pressure sensing of processes sensitive to cross-contamination, particle accumulation, and viscous fluid problems (Series 23).


Company offers a full line of mechanical and electronic pressure/temperature instruments, temperature instruments and diaphragm seals.

Wika is ISO 9001 certified.
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Publication:Plastics Technology
Date:Nov 1, 2005
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