Trafag Industrial Pressure Transmitter
Manufacturer: Trafag Sensors & Controls (Switzerland)
Pressure Range: 0 … 1 bar (Gauge)
Serial No: 521465
1. General Description
This is a robust industrial pressure transmitter from Trafag, designed for the precise measurement of fluids and gases. Based on the visual design and the 2009 manufacturing date, this likely belongs to the ECT or NAT series.
It features a compact stainless steel housing and a ceramic or thin-film-on-steel sensor cell, offering excellent long-term stability. The “bar g” marking indicates it measures relative (gauge) pressure, meaning it measures pressure relative to the atmospheric pressure.
Key Features 🎯
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Low Pressure Range: Specifically calibrated for 0 … 1 bar.
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Robust Construction: Full stainless steel housing for high durability.
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Temperature Compensated: Electronics are compensated for accuracy between 0…70°C.
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Standard Connection: Equipped with a widely used DIN 43650-A (GDM) connector for easy installation and maintenance.
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Swiss Quality: Manufactured by Trafag, known for high-precision hydraulics and engine monitoring sensors.
2. Technical Specifications
Performance Data (from label)
| Parameter | Value |
| Pressure Range (p) | 0 … 1 bar g (Gauge / Relative) |
| Compensated Temp. (Tcomp) | 0 … +70 °C |
| Max. Overpressure | Typically 2 bar or higher (for 1 bar range) |
| Date of Manufacture | 05 / 2009 |
Electrical Data (Typical for this housing)
Note: The output signal code is usually on the top or side label, not visible here. Standard variations include:
| Parameter | Specification |
| Output Signal | 4 … 20 mA (2-wire) – Most Common |
| Or 0 … 10 V DC (3-wire) | |
| Supply Voltage | Typically 9 … 30 V DC |
| Electrical Connection | DIN 43650-A (Large cubic connector) |
| Protection Class | IP65 (when connector is secured) |
Mechanical Data
| Parameter | Value |
| Housing Material | Stainless Steel (1.4301 / 304 or 1.4435 / 316L) |
| Process Connection | Threaded Male, likely G 1/4″ (Standard European) |
| Seal | FKM / Viton (Standard) |
3. Wiring (Standard DIN 43650-A)
For the most common 2-wire 4-20mA configuration:
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Pin 1: Supply Voltage (+ VDC)
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Pin 2: Output Signal (4-20 mA)
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Pin 3: Not Used (or 0V for 3-wire voltage versions)
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Ground Symbol: Earth / Shield
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