Miniaturised 4–20 mA Pressure Sensors from DDM Sensors

DDM Sensors offers miniaturised pressure sensors that are specifically designed for use in demanding industrial applications with limited installation space. Our sensors are characterised by their compact design, for example with diameters of just 22 mm (PX-22) or 25 mm (PX-25 series), and a robust 4–20 mA current loop signal. They guarantee the highest precision, as demonstrated by the total error of up to ≤ ± 0.5% in the PX-25L model, and outstanding operational reliability.

Miniaturized Pressure Sensors 4-20 mA: Product Overview

Our product range includes specialized pressure sensors that provide the industry-standard 4-20 mA output signal.

Technical Specifications

Key Features of our 4-20 mA Sensors:

Our 4-20 mA pressure sensors cover extensive measuring ranges for gauge pressure from 0.1 to 150 bar and for absolute pressure from 0.25 to 150 bar. High measuring accuracy is achieved with a total error of up to ≤ ± 0.5% (Model PX-25L) and a robust overload resistance of up to 400%. We offer a variety of process connections such as G1/4″ (internal/external), which can also be customized according to customer requirements.

Thanks to wetted materials made of high-quality stainless steel (1.4404, 1.4435), the sensors are compatible with various gaseous and liquid media.

Specification Table

Feature	PX-25L	PX-25H	PV-2722	PX-22
Measuring Range	Gauge: 0.1–250 bar Abs: 0.25–250 bar	Gauge: 0.1–250 bar Abs: 0.25–250 bar	100 mbar to 3.5 bar (Differential)	Gauge: 0.1–250 bar Abs: 0.25–250 bar
Accuracy	Up to ≤ ± 0.02% FS	Up to ≤ ± 0.02% FS	Up to ≤ ± 0.1% FS	Up to ≤ ± 0.05% FS
Total Error	Up to ≤ ± 0.25% FS	Up to ≤ ± 0.25% FS	Up to ≤ ± 0.5% FS	Up to ≤ ± 0.25% FS
Op. Temp Range	0 to +50 °C	-20 to +80 °C	-40 to +125 °C	-40 to +125 °C
Overload Res.	200 / 400 %	200 / 400 %	200 to 400 %	200 / 400 %
Pressure Type	Gauge / Absolute	Gauge / Absolute	Differential	Gauge / Absolute
Process Conn.	G1/4“ int / ext	G1/4“ int / ext	M10×1 (90° internal)	Various
Ambient Temp.	-20 to +80 °C	-20 to +80 °C	-40 to +125 °C	-40 to +125 °C
Protection (IP)	IP67 / IP65	IP67 / IP65	Connector dependent	Connector dependent
Media Comp.	Stainless St. (1.4404/35)	Stainless St. (1.4404/35)	Stainless St. (1.4404/35)	Stainless St. (1.4404/35)

Advantages of the 4-20 mA Signal

The 4-20 mA current loop is an established industrial standard offering significant benefits:

• High Noise Immunity: Ensures reliable data transmission even over long distances to the PLC.

• Two-Wire Technology: Minimizes wiring effort and costs.

• Error Detection: A signal drop to 0 mA indicates a cable break, clearly distinguishable from a valid zero-point measurement at 4 mA.

Applications For Our Miniaturised Pressure Sensors

Thanks to our robust design, high precision and compact form, our miniaturised pressure sensors are suitable for a wide range of demanding applications, such as:

• Hydraulics and Pneumatics 

• Mechanical and Plant Engineering

• Medical Technology

• Test Bench and Vehicle Technology

• Process Engineering

Integration und Installation

Mechanical mounting is performed via the process connection. Electrical connection is realized via a simple two-wire line. We offer various options: cables (1m, IP67), EN 175301-803 Form A connectors (IP65), M12x1, or MIL connectors.

Quality And Durability Of The 4–20 mA Pressure Sensors

We ensure the quality and durability of our 4–20 mA pressure sensors through the consistent use of high-quality materials such as stainless steel 1.4404 and 1.4435 for all parts in contact with the medium. The sensors exhibit high resistance to vibration and shock (vibration resistance class 1) and deliver measurement results that remain stable over the long term, with a typical deviation of ≤ 0.1% per year. As part of our comprehensive quality control in accordance with ISO 9001, every product undergoes rigorous testing. On request, we are happy to issue a factory calibration certificate for your sensor.

Bespoke Solutions For The 4–20 mA Pressure Sensors

We develop bespoke 4-20 mA pressure sensors that are precisely tailored to your specific requirements.
We offer customisation of measurement ranges and process connections, as well as the configuration of specific electrical interfaces. Material adjustments can be made for use with aggressive media. For complex challenges, we develop complete custom solutions in close collaboration with you. To this end, you have direct access to our DDM Sensors development department.

Delivery Times For The 4–20 mA Pressure Sensors 

We guarantee short delivery times for our pressure sensors to support your projects on schedule. Common models are often available directly from stock. For standard configurations, the delivery time is usually around 3 weeks. When implementing project-specific custom solutions, we coordinate delivery times individually with you to guarantee reliable planning and efficient implementation.

Get Advice On 4-20 mA Pressure Sensors Now

Leverage our expertise for your application and seek advice from our specialists. Request a no-obligation quote now or arrange a technical consultation to find the optimal sensor solution for your requirements.