SITRANS P320/P420 combine high accuracy, fast response and advanced diagnostics with remote access to safety-relevant functions. Users can read values, configure devices, perform maintenance and support SIL workflows from the control room, reducing field visits, downtime and exposure in hazardous areas.
With proof-test intervals of up to 15 years, guided commissioning and clear diagnostics, these transmitters reduce service effort, downtime and total cost of ownership.
High accuracy, fast response time and rugged design support stable measurement in chemical, petrochemical and other demanding industries where safety is critical.
Covers gauge, absolute and differential pressure and supports level, volume flow and mass flow measurement. This flexibility enables you to use one transmitter family across many process tasks.
Accuracy | Up to 0.065 % for SITRANS P320 and up to 0.04% for SITRANS P420 |
Measuring range | From 10 mbar to 700 bar, depending on version and measuring cell |
Response time & long-term stability | Down to 105 ms and ≤ 0.125 % / 5 years |
Certificates/approvals | ATEX, IEC EX, FM, CSA, NEPSI and others |
Safety, diagnostics and operating conditions | IEC 61508 for SIL2/3 applications, diagnostics according to NAMUR NE107 and measured medium temperatures –40° up to +100°C |
Communication | 4 to 20 mA with HART, PROFIBUS PA, FOUNDATION Fieldbus |
Remote Safety Handling supports configuration, maintenance and SIL validation remotely from the control room, reducing exposure in hazardous areas and shortening commissioning. Proof-test intervals of up to 15 years help optimize service effort, while easy access to measurement data simplifies operation of pressure and temperature devices without time-consuming field visits.
SITRANS P420 offers onboard process value storage and trend recording of up to 1,500 measured values. This gives users deeper insight into process behavior and supports optimization and maintenance decisions. It enables better monitoring of trends over time, helps detect deviations early, improves transparency and supports more informed service planning and process optimization across the plant.
A large display and four buttons enable simple local setup and operation. Diagnostics according to NAMUR NE107 provide clear device status information, helping users identify issues faster and plan maintenance more efficiently. SITRANS IQ Guard adds 24/7 transparency across process integration, verification, diagnostics and continuous monitoring of field devices and process values.
The transmitter uses an innovative three-barrier design. If two barriers fail and the sensor is damaged, an alarm is triggered while the third barrier helps prevent gas from escaping. This high protection is designed for hazardous gas applications and helps enhance operational safety for personnel and equipment, even under extreme conditions such as overpressure or corrosion.
CASE STUDY
Company: Linde Gas
Exact pressure measurements are critical to the entire separation process — two vessels, called columns, create a pressure difference that causes the nitrogen to separate from the oxygen.
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