JUMO MIDAS S22 Ex Miniature Pressure Transmitter

Advanced Pressure Measurement for Hazardous Areas

The JUMO MIDAS S22 Ex is a state-of-the-art miniature pressure transmitter specifically developed for accurate and safe pressure monitoring in explosive atmospheres. Operating on the proven piezoresistive measuring principle, this transmitter converts physical pressure into a load-independent, linearly proportional 4 to 20 mA direct current output. Certified for use in hazardous zones 1 and 2 (device group II) as well as zones 21 and 22 (device group III), it provides absolute safety and compliance for critical industrial sectors such as oil and gas, chemical processing, and painting systems.

High Precision and Superior Reliability

Built upon the field-proven sensor technology of the JUMO MIDAS series, the S22 Ex ensures exceptional measurement accuracy and long-term performance. It offers comprehensive measuring ranges from 2.5 bar up to 100 bar for both relative and absolute pressure ratings. With a standard linearity deviation of 0.3% MSP and an annual long-term stability of <= 0.2% per year, the device minimizes drift and calibration requirements. Furthermore, rapid step response times (T90 <= 3 ms) allow for precise tracking of both static and dynamic pressure fluctuations.

Rugged Welded Construction and Safety Ratings

Designed to endure extreme operational environments, the transmitter features a fully welded stainless steel system (304 housing, 316Ti process connection, and 316L membrane) that ensures high resistance against aggressive media and mechanical wear. High burst pressure ratings of up to 400 bar (10 times the measuring span) guarantee structural integrity and process safety even during unexpected pressure surges. The unit achieves an IP68 enclosure protection rating, safeguarding internal electronics against moisture and dust ingress.

International Ex-Approvals and Flexibility

The JUMO MIDAS S22 Ex holds rigorous international certifications, including ATEX (SEV 21 ATEX 0537 X), UKEX (EPS 22 UKEX 1 089 X), and IECEx (IECEx SEV 21.0011X), confirming its adherence to strict global safety standards. Available with flexible electrical connection options such as round plug M12 x 1 or attached PUR cables, it seamlessly integrates into existing control architectures and plant layouts. Its compact footprint makes it an ideal solution for installations where space is constrained without compromising on safety or measurement accuracy.

Application

• Oil, Fuel, and Natural Gas Industry: Safe pressure monitoring in hazardous extraction and transport lines.

• Chemical and Petrochemical Processing: Reliable measurement of aggressive gases, vapors, and liquids in Ex-zones.

• Painting Plants and Robots: Precise fluid and pneumatic pressure control in automated coating lines.

• Plant and Process Engineering: Integration into complex industrial automation systems requiring explosion-proof instrumentation.

• Testing and Laboratory Technology: Accurate dynamic and static pressure testing in controlled environments.

Technical Specifications

• Measuring Ranges: 2.5 to 100 bar relative and absolute pressure.

• Output Signal: 4 to 20 mA, 2-wire.

• Voltage Supply (UB): DC 16 to 28 V.

• Linearity: 0.3% MSP (limit point setting = 2 x BFSL).

• Long-term Stability: <= 0.2% per year.

• Step Response Time (T90): <= 3 ms.

• Ex Approvals: ATEX (II 2G Ex ib IIC T6…T4 Gb, II 2D Ex ib IIIC T70°C…T100°C Db), UKEX, IECEx.

• Wetted Parts Material: Process connection: Stainless steel 316Ti; Membrane: Stainless steel 316L.

• Housing Material: Stainless steel 304.

• Enclosure Protection: IP68 (according to DIN EN 60529).

• Burst Pressure: Up to 400 bar (10 times the measuring span).

• Weight: Approx. 55 g.

FAQ

Q1: Is the JUMO MIDAS S22 Ex certified for use in explosive atmospheres? A: Yes, the transmitter holds ATEX, UKEX, and IECEx certifications, making it fully approved for hazardous zones 1, 2, 21, and 22.

Q2: What output signal does this pressure transmitter provide? A: It provides a standard, load-independent 4 to 20 mA two-wire output signal linearly proportional to the input pressure.

Q3: What is the maximum burst pressure for the S22 Ex? A: The device features high burst pressure resistance of up to 400 bar, depending on the selected measuring range (equivalent to up to 10 times the measuring span).

Q4: Can this model handle both relative and absolute pressure measurements? A: Yes, it supports measuring ranges from 2.5 to 100 bar for both relative (gauge) and absolute pressure ratings.

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