Mercury Free Series

EPR4 Push Rod Sensors

EPR4 Push Rod Sensors

The EPR4 series are sensors with ± 0.5% accuracy ideal for food or medical applications requiring easy installation, repeatability and reliability. Technology Push Rod design is especially suitable for food or medical applications with the possibility of filled systems. EPR4 provide an industry standard in the form of an amplified 4-20 mA signal designed to work with DCS and PLC. The EPR4 model is available in various pressure variants.

EPR pressure sensor with rigid construction and mercury-free filling.

EPR pressure sensor with rigid construction and mercury-free filling.

EPR pressure sensor with rigid construction and mercury-free filling.

EPR pressure sensor with rigid construction and mercury-free filling.

EPR pressure sensor with rigid construction and mercury-free filling.

EPR pressure sensor with rigid construction and mercury-free filling.

EPR pressure sensor with rigid construction and mercury-free filling.

EPR pressure sensor with rigid construction and mercury-free filling.

Detail - Bayonet cable connector Amphenol 6-PIN

Detail - Bayonet cable connector Amphenol 6-PIN

Detail - Bayonet cable connector Amphenol 6-PIN

Detail - Bayonet cable connector Amphenol 6-PIN

Inquiry system 

Configure your own product according to your requirements and needs. If you are unsure of the configuration, provide us in the notes the necessary information about the existing sensor or product, even a competitor. We will be happy to help you find an alternative Dynisco product. If your request is urgent, let us know. We will do our best to help you resolve this situation to your satisfaction as quickly as possible. If we have all the information, we are able to offer a model with minor differences, which is in stock and you can have another product available the next day.

If you need more information do not hesitate to contact us.

Dynisco Configuration Code:

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Local and remote rezeroing capability

Our pressure sensors offer efficient, accurate, and durable solutions for reliable and safe pressure measurement. These sensors are used in a variety of industrial areas, where they monitor and measure the pressure of molten materials, ensuring optimal operation of production processes. Due to their resistance to high temperatures and pressures, which are typical for these applications, they represent a suitable choice for diverse uses. When selecting a sensor, it is important to consider the specific requirements of your application, such as temperature range, pressure range, and materials with which the sensor will interact. The correct choice of sensor guarantees reliable and accurate results and a long service life of the device without any problems. Installing the sensor into the mounting hole of the production line is simple.
However, if you have doubts about the proper installation, do not hesitate to contact our technicians. We are ready to provide support and offer the ideal solution for your application.

The push-rod technology provides a design suitable for applications where a filled system may not be desirable. The EPR4 transmitters provide the industry standard 4 - 20 mA amplified signal designed to work with DCS and PLCs. The EPR4 comes equipped with adjustable zero and span pots. Optional thermocouple or RTD configurations are available to provide melt temperature. The EPR4 can feature either the standard push rod configuration (see mechanical drawing) or a 1/2-20 UNF thread for simple and easy installation in standard transducer mounting holes (M561).

EPR4 Push Rod  - With rigid stem

Rigid Stem pressure sensors are easily installed into the mounting hole of the production line, ensuring a simple and robust design that is suitable for applications where the sensor is not exposed to radiant heat from the line and the electronics are not subjected to extreme temperatures. We do not recommend installing these sensors in a vertical position above the line (12 o'clock position), as radiant heat can negatively affect the sensor's electronics lifespan. In such cases, we recommend using a sensor design with a flexible capillary, which allows the electronics to be diverted away from the radiant heat, ensuring a long sensor life. The main advantages of this type of sensor include resistance to impacts and vibrations, enabling them to withstand mechanical stress, which increases their lifespan and reduces the need for maintenance. They also feature high accuracy, ensured by quality materials and advanced measurement technology, which is crucial for efficient process control.

Performance Characteristics 

Ranges (psi): 0 - 10 000 PSI
Accuracy: ±0.5% FSO
Repeatability: ±0.2% FSO
Mounting Torque: 100 inch - lbs. recommended, 250 inch - lbs. maximum
Maximum Pressure: 150% full scale
Material In Contact With Pressure Media: 17 - 4 PH stainless steel, Dymax® coated
Weight: 13.25 oz


Electrical Characteristics


Configuration: Four active arm bonded Wheatstone bridge strain gage
Bridge Resistance: Input: 345 Ohms minimum; Output: 350 Ohms ±10%
Excitation: 10 Vdc recommended, 12 Vdc maximum
Internal Shunt Calibration (R-Cal): 80% FSO ±1.0%
Insulation Resistance: 1,000 megohms at 50 VDC

Temperature Characteristics


Transducer Diaphragm:
Maximum Diaphragm Temperature: 750°F (400°C)
Zero Shift Due To Temperature Change: ±1.0% full scale/100°F (±2.0% full scale/100°C)
Sensitivity Shift Due To Temperature Change: ±1.0% full scale/100°F (±2.0% full scale/100°C)
Electronics Housing:
Maximum Temperature: 250°F (121°C) 
Zero Shift Due To Temperature Change: ±1.0% full scale/100°F (±2.0% full scale/100°C) 
Sensitivity Shift Due To Temperature Change: ±1.0% full scale/100°F (±2.0% full scale/100°C)

Ordering Guide for EPR4



EPR4 - Dimensions  

All dimensions are inches (mm) unless otherwise specified.


Torque wrench Wera 20 - 100 Nm

Torque wrench Wera 075611 Click-Torque B 2 with switch ratchet 3/8 "(20 - 100 Nm)

Wera Click-Torque torque wrenches are supplied as switch ratchets (with connection dimensions 1/4 ", 3/8", 1/2 "and 3/4") or with clamping for socket tools (9x12 mm, 14x18 mm) for tightening torques from 2.5 Nm up to 1,000 Nm.
All Wera Click-Torque torque wrenches manufactured in accordance with DIN EN ISO 6789 are supplied with a declaration of conformity.

Transducer Mounting Hole Cleaning Tool Kit

Installation of transducers into improperly cleaned or sized holes is one of the major causes of damage to these instruments. With this kit, the .312" tip diameter hole, the 45 degree seating surface, and the .451" hole can be cleaned. The kit includes a gauging plug which is used to verify that the hole has been correctly machined and cleaned. M10 and M18 cleaning kits also available.

Transducer Mounting Hole Machining Tool Kit

The Dynisco Transducer Mounting Hole Machining Tool Kit contains all of the necessary drills and taps to prepare a standard 1/2 - 20 UNF transducer mounting hole and the 45 degree seat. All tools included in this kit are made of premium grade, high strength tool steel. Care should be taken in the use of proper speeds and feeds, lubricants, and a method to assure continual alignment of each progressing tool. M10 and M18 kits are also available.

1480 Panel Indicator

The 1480 is a Universal Pressure or Temperature Input Indicator with single or dual configurable alarms, as well as optional linear retransmission of displayed Process Variable. Ideal for use in Extrusion applications. 

1490 Process Panel Indicator

The 1490 is a Universal Input Indicator with single or dual configurable alarms, optional linear retransmission of Process Variable, Transmitter power supply option as well as optional Modbus communications. 

UPR 900 Panel Indicator

The UPR900 is a compact 1/4 DIN process indicator. The UPR900 can display your choice of engineering units related to a selectable range of input types. Add an optional secondary input for an all-in-one display of polymer melt pressure and temperature. The secondary input can be strain gauge to indicate differential pressure measurement. The UPR900 includes two standard assignable alarms with the option to add a 3rd. 

ATC990 Process Panel Controller

The ATC990 with a graphical/text LCD display is a universal input process controller with advanced functionality including Trend views as well as Digital Inputs, USB and data logging options. It provides a cost-effective way to control a single process parameter, such as for a plastics extruder. Designed to improve user efficiency many features are integrated to reduce commissioning time, simplify operation and minimize maintenance downtime. Reliably auto-tune and alarm on strain gauge, DC voltage, temperature or current inputs.

PPS1210 calibration pump

The PPS1210 pressure calibration pump with heated pressure port enables fast and accurate inspection of melt pressure sensors directly in the laboratory or directly in the factory. Thanks to its compact dimensions, it is easily portable.

Certificates & Approvals

Overview of Available Certificates and Approvals: Visit this link, which will take you to a page with a comprehensive list of current certificates and approvals for our products. Here, you can verify that our offerings meet the highest standards of quality and safety.


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