GE SENSING 362A3389P001 Druck PTX661-13G-3433 is an industrial high-precision two-wire pressure transmitter. Developed and manufactured by Druck, a brand under General Electric (GE), it is tailor-made for harsh industrial working conditions such as oil & gas and chemical industries. It can accurately measure the pressure of gas and liquid media with a standard 4-20 mA signal output. Featuring excellent long-term stability, vibration resistance, impact resistance and intrinsic safety explosion-proof performance, it is applicable to static and dynamic pressure monitoring under severe working conditions.
Brand Background
GE SENSING (now part of Amphenol Advanced Sensors) is a world-leading provider of sensing solutions. Its Druck brand has specialized in the pressure measurement field for over 50 years, renowned for high-precision silicon sensing technology and excellent adaptability to harsh environments.
Model Correspondence
362A3389P001: GE internal part number, corresponding to the standard Druck model PTX661-13G-3433.PTX661: Product series — Hammer-type mud pressure transmitter series.13G: Electrical interface code (6-pin Bayonet connector) + pressure range code (0-100psi / 0-7bar gauge pressure).3433: Custom configuration code (including NACE-compliant material and intrinsic safety explosion-proof certification).
Core Technical Parameters
1. Measurement Performance
Pressure Range: 0-100psi (0-7bar) gauge pressure (standard range; absolute pressure / compound range customizable).Accuracy: ±0.1% FS (comprehensive error of non-linearity, hysteresis and repeatability, BSL best straight line).Long-term Stability: ≤0.1% FS per year (typical value: 0.05% FS per year).Response Time: ≤0.5ms (frequency response 2kHz, suitable for dynamic pressure measurement).Overload Capacity: 3 times FS (max 20,000psi/1380bar) without performance degradation.
2. Electrical Characteristics
Output Signal: 4-20mA (two-wire current loop).Supply Voltage: 9-30VDC (10-28VDC for intrinsic safety type).Load Capacity: Maximum load resistance = (Supply Voltage - 10V) / 0.02A.Insulation Resistance: ＞10MΩ @500VDC (anti-electromagnetic interference).Zero / Span Adjustment: ±1% FS (zero point), ±0.5% FS (span), adjustable at 23℃ ambient temperature.
3. Environmental & Physical Characteristics
Media Temperature: -40℃ ~ +120℃.Ambient Temperature: -20℃ ~ +80℃ (compensation range); -40℃ ~ +120℃ (operating range).Storage Temperature: -54℃ ~ +150℃.Ingress Protection: IP66 (dust-proof and splash-proof), Type 4X certified.Vibration Resistance: 30g peak, 10Hz-2kHz vibration, error ＜0.05% FS/g.Shock Resistance: 1000g, 1ms half-sine pulse without calibration drift.Material: Pressure port: 316L stainless steel; Isolation diaphragm: Hastelloy C276 (NACE MR-0175 compliant, resistant to acid gas corrosion).Pressure Port: G1/4 internal thread (M20×1.5, 1/4NPT adapter optional).Electrical Interface: 6-pin Bayonet connector (MIL-C-26482 standard).
Working Principle
It adopts core micromechanical silicon diaphragm sensing technology. The silicon diaphragm is electrostatically bonded to a glass substrate. The pressure medium contacts the Hastelloy C276 isolation diaphragm welded by electron beam. Pressure deformation of the silicon diaphragm converts into resistance variation signals. After amplification, temperature compensation and linearization processing by the built-in high-precision circuit, a standard 4-20mA current signal is output, realizing accurate conversion between pressure and electrical signals.The circuit is equipped with reverse polarity protection, overvoltage protection and EMC filtering functions. The fully encapsulated design adapts to high-shock and high-vibration environments.
Main Features
- High Precision & High Stability: Silicon sensing technology plus full temperature range compensation ensures low long-term drift, ideal for precision pressure monitoring.
- Excellent Adaptability to Harsh Environments: NACE-compliant material, IP66 protection, vibration and shock resistance, suitable for high-risk working conditions such as drilling and chemical industry.
- Fast Dynamic Response: 2kHz frequency response capable of capturing dynamic fluctuation signals such as mud pressure.
- Intrinsically Safe Explosion-proof: Multiple international explosion-proof certifications for direct use in flammable and explosive hazardous areas.
- Modular & Easy Maintenance: Replaceable sensing core (PTX721-8518) reduces maintenance costs without full unit replacement.
- Wide Voltage Power Supply: 9-30VDC power supply compatible with industrial standard 24VDC systems with flexible wiring.
Application Scenarios
- Oil & Gas: Drilling mud pressure monitoring, wellhead pressure, pressure measurement of oil and gas transmission pipelines.
- Chemical Industry: Pressure monitoring of corrosive media (acid, alkali, salt solution) and pressure control of reaction kettles.
- Industrial Automation: Closed-loop pressure control of hydraulic/pneumatic systems and pressure monitoring of pressure vessels.
- Power & Energy: Pressure monitoring of boilers, turbine oil pressure and gas pipelines.
FAQ
Q: Can this transmitter directly measure corrosive media?A: Yes. The pressure port adopts 316L stainless steel and the isolation diaphragm is Hastelloy C276, compatible with most acid, alkali, salt and acid gas media, complying with NACE MR-0175 standard.
Q: What is the maximum transmission distance of the 4-20mA signal?A: It depends on supply voltage and load resistance. For example, with 24VDC power supply, the maximum load is 700Ω, and the transmission distance can reach over 1km. Shielded twisted pair is recommended to reduce interference.
Q: How to calibrate when the transmitter reading drifts?A: At ambient temperature of 23℃, apply zero and full-scale pressure via a standard pressure source, fine-tune the zero point (±1% FS) and span (±0.5% FS) through the sealed potentiometer on the side of the transmitter, then seal the potentiometer after calibration to avoid accidental adjustment.
Q: What should be noted for installation in hazardous areas?A: Must be used with an intrinsic safety barrier and powered by an intrinsically safe power supply; use explosion-proof cables for electrical connection with sealed and waterproof interfaces; do not open the cover for maintenance when powered on.
Q: Will overload pressure beyond the rated value cause damage?A: Short-term overload of 3 times FS causes no performance degradation; overload exceeding 2 times FS (max 20,000psi) may lead to diaphragm deformation and damage, overpressure operation should be avoided.
Q: How to troubleshoot abnormal output signals (lower than 4mA or higher than 20mA)?
A: ① Check if the supply voltage is normal (9-30VDC);
② Verify correct wiring polarity (+/-);
③ Measure whether the load resistance exceeds the limit;
④ Confirm whether the medium pressure is over-range;
⑤ Check for damage or contamination of the sensor diaphragm.
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