Siemens 7MF1567-3DE00-3GA1 — SITRANS P320 Gauge Pressure Transmitter | 0–400 bar | 4–20mA HART | New Sealed

Pressure measurement sounds straightforward until you're specifying for a high-pressure hydraulic system, a compressor station, or a refrigeration circuit running R-134a. At that point, details like process connection thread, pressure range, output protocol, and ingress protection start to matter a great deal — and getting them wrong means a transmitter that doesn't fit, doesn't reach, or doesn't communicate.

The 7MF1567-3DE00-3GA1 is a Siemens SITRANS P320 series gauge pressure transmitter configured for 0 to 400 bar measurement range with 4–20mA + HART output. It's a robust, compact unit designed for demanding industrial process environments where moderate-to-high line pressures need continuous monitoring and integration into a DCS, SCADA, or PLC system.

✅ New sealed. Genuine Siemens. CE certified. Ships worldwide.

Order Number Decoded — 7MF1567-3DE00-3GA1

The 16-character Siemens SITRANS P order number contains the complete technical specification of the transmitter. Here's what each section means:

7MF1567 — SITRANS P320 series base number. The P320 is a compact gauge pressure transmitter with a welded stainless steel sensing element, suitable for industrial process and utility applications.

-3 — Stainless steel process connection (1.4404 / 316L equivalent). This is the standard wetted material specification for process compatibility with a wide range of fluids.

D — Measuring range code. "D" in the SITRANS P320 numbering corresponds to the higher pressure ranges — the 0–400 bar range puts this firmly in the high-pressure segment, suitable for hydraulic systems, compressors, and high-pressure process lines.

E — Measurement type: gauge pressure (relative to atmosphere). Not absolute pressure. The transmitter measures pressure above ambient — a reading of zero means the process pressure equals atmospheric pressure.

00 — No display, standard housing. No local indicator is included in this configuration.

-3GA1 — Communication and output suffix: 3G = 4–20mA with HART (two-wire), A1 = standard cable entry / M20 cable gland entry. HART communication allows configuration, diagnostics, and parameter readback over the same two-wire 4–20mA loop without additional wiring.

Technical Specifications

Parameter	Specification
Order Number	7MF1567-3DE00-3GA1
Product Series	Siemens SITRANS P320
Measurement Type	Gauge Pressure (relative to atmosphere)
Measuring Range	0 to 400 bar
Overload Pressure	600 bar (1.5× MWP — do not exceed in installation)
Output Signal	4–20mA (2-wire) + HART protocol
Supply Voltage	10.5–45V DC (2-wire loop powered)
Accuracy	±0.1% of span (reference conditions)
Long-Term Stability	< 0.1% per year
Wetted Parts Material	Stainless steel 1.4404 (316L)
Process Connection	G1/2" male (DIN 3852) — verify at installation
Electrical Connection	M20 × 1.5 cable entry
Ambient Temperature	–40°C to +85°C
Process Temperature	–40°C to +100°C (standard)
Protection Rating	IP65 (dust-tight, jet-water resistant)
Explosion Protection	Not in this configuration
Certifications	CE, RoHS
Condition	New Sealed / Factory Sealed

Gauge vs Absolute Pressure — Making Sure You Order the Right Type

The "-E" in the order number (gauge pressure) is one of the most commonly confused specifications when ordering pressure transmitters. Here's the practical distinction:

Gauge pressure (this unit) measures pressure relative to the local atmosphere. A process running at 10 bar gauge is 10 bar above ambient. If atmospheric pressure changes, the zero reference changes with it. Most industrial process applications — hydraulics, pneumatics, compressed air, pump discharge — use gauge pressure measurement because what matters is the differential above atmosphere, not the absolute value.

Absolute pressure measures pressure relative to a perfect vacuum. 1 bar absolute equals approximately atmospheric pressure at sea level. Absolute transmitters are needed when atmospheric pressure variation matters to the measurement — vacuum systems, altitude-sensitive applications, or processes where absolute gas pressure is the relevant process variable.

If you're replacing an existing transmitter, match the measurement type of the original. Swapping a gauge transmitter for an absolute one on a process where gauge pressure is the control variable will give readings offset by approximately 1 bar — enough to cause serious process control problems.

HART Communication — What It Gives You in Practice

The HART (Highway Addressable Remote Transducer) protocol built into the 7MF1567-3DE00-3GA1 is often underutilized because field technicians default to using only the 4–20mA analog signal. That's leaving value on the table. Over the same two-wire connection, HART provides:

Remote configuration — zero and span calibration, measuring range adjustment, damping time constant, engineering units, and tag name can all be changed from a HART communicator or PC tool without visiting the field device. For transmitters in hazardous areas or physically inaccessible locations, this is a real maintenance advantage.

Diagnostics — the transmitter transmits diagnostic information including sensor temperature, output current, loop integrity check, and internal error flags. A HART-capable DCS (like Siemens PCS 7, Yokogawa CENTUM, or Emerson DeltaV) can monitor these values continuously and alert operators to transmitter health issues before a failure occurs.

Multivariable output — in HART multidrop configurations (multiple transmitters on one loop, all at 4mA, communication via HART only), a single pair of wires can carry data from multiple transmitters — useful in tight cable tray situations with dense instrument clusters.

Installation Considerations for 400 Bar Service

At 400 bar (5,800 psi), this isn't a utility instrument — it's a high-pressure process transmitter that requires proper installation practice:

Impulse line sizing matters at high pressure. Use tubing rated for at least 1.5× the maximum working pressure — for 400 bar service, 600 bar rated tube is the standard minimum. Use compression fittings (Swagelok or equivalent) appropriate for the pressure rating; do not use NPT threads in push-to-connect fittings.

The process connection thread on the 7MF1567-3DE00-3GA1 is G1/2" (BSP parallel thread per DIN 3852). Confirm your tapping point thread standard before installation. G1/2" requires a sealing face on the port — it does not self-seal on the thread like NPT. Use a copper or aluminum sealing washer in the G1/2" port, and confirm the port face is clean and undamaged before torquing.

For vibrating installations (compressors, pump headers), consider a close-coupled root valve that allows transmitter isolation without process shutdown, and remote-seal diaphragm arrangements if pulsation could damage the sensor.

❓ FAQ — Siemens 7MF1567-3DE00-3GA1

Q1: What is the exact measuring range of this transmitter?

This transmitter is configured for 0 to 400 bar gauge pressure. The maximum overload pressure (the pressure above which permanent sensor damage may occur) is 600 bar — 1.5 times the measuring range upper limit. Never exceed the overload pressure rating during pressure testing or surge events in the process.

Q2: What does the "-3GA1" suffix mean — can I order a version with a local display instead?

The "-3GA1" suffix specifies no local display and M20 cable entry. Siemens offers a version of the SITRANS P320 with an integrated LCD display (showing the current measured value in engineering units) by changing the suffix — look for configurations containing "DA" in the display position of the order number. If your process location requires local reading without a HART communicator, order the display-equipped version. The display also shows diagnostic information and allows basic parameter changes via front-panel buttons.

Q3: Is HART communication standard on this unit, or an option?

The "-3G" output designation in the order number confirms that HART is included as standard in this configuration — it's not an add-on option. The 4–20mA signal and HART digital communication both operate simultaneously over the same two-wire connection. No additional hardware is needed for HART communication; you just need a HART communicator (like an Emerson 475 or Beamex) or a HART modem connected to the loop.

Q4: What process fluids is this transmitter compatible with?

The wetted parts (the parts in contact with the process fluid) are stainless steel 1.4404 (equivalent to 316L). This material is compatible with a broad range of fluids including water, steam (within temperature limits), hydraulic oil, many hydrocarbons, and common process chemicals. It is not suitable for highly concentrated acids, chlorine-containing fluids, or specific chemical services — for aggressive media, SITRANS P variants with Hastelloy or ceramic sensing elements are available. Always verify chemical compatibility for your specific process fluid before installation.

Q5: How do I configure the 4–20mA output range using a HART communicator?

Connect a HART communicator (or HART modem with PC software like Siemens SIMATIC PDM) to the loop while the transmitter is powered. Navigate to the configuration menu and set the Lower Range Value (LRV = 0 bar → 4mA) and Upper Range Value (URV = 400 bar → 20mA). You can also adjust output damping (response time filtering), set a failsafe output current (3.6mA or 22mA on fault), and configure the engineering units displayed. All changes are saved in non-volatile memory inside the transmitter.

Q6: What is the difference between SITRANS P220, P320, and P500?

These are different product lines within Siemens' SITRANS P family, aimed at different application tiers. The P220 (older series, 7MF4) is a basic 4–20mA transmitter with limited HART capability, suitable for standard process monitoring. The P320 (this unit, 7MF1567) is the current mid-range offering with full HART, better accuracy (±0.1% of span), and wider ambient temperature range — it replaced the P220 as the standard industrial choice. The P500 (7MF4 high-end) adds Foundation Fieldbus and PROFIBUS PA communication options, Bluetooth configuration capability, and enhanced diagnostics for premium process applications. For standard industrial process monitoring with 4–20mA DCS integration, the P320 is the practical choice.

Q7: Can I use this transmitter in a hazardous area (Ex zone)?

This specific configuration (7MF1567-3DE00-3GA1) does not include explosion protection certification — it is suitable for non-hazardous (safe area) installations only. SITRANS P320 transmitters are available with ATEX, IECEx, and FM hazardous area certifications, but those require specific order number suffixes indicating the Ex approval type (e.g., Ex ia, Ex d). If your installation is in a classified hazardous area (Zone 1, Zone 2, Division 1/2), you must specify and order the appropriate Ex-certified variant. Never install a non-Ex transmitter in a classified hazardous area regardless of application pressure.

7MF1567-3DE00-3GA1 Siemens 7MF15673BD001CA1 Sitrans Transmitter New sealed