CNXPT Pressure Transmitter: Precision and Performance in Industrial Applications
Introduction to the CNXPT Pressure Transmitter
The CNXPT Pressure Transmitter by Connexion is a high-performance measurement device utilizing the HT series diffusion silicon isolation oil-filled core. Designed for rugged environments, the CNXPT efficiently converts measured pressure into a standard output signal, packaged within a robust stainless-steel enclosure. Every unit undergoes stringent testing and aging verification to ensure long-term stability and reliable performance.
Key Features of the CNXPT Diffused Silicon Pressure Sensor
High Performance and Versatility
Wide measurement range from -1 Bar to 1000 Bar
Multiple pressure interfaces available
Adjustable zero and full-scale calibration
High accuracy levels with ±0.25% typical precision
Long-term stability of ±0.1% F.S./year
Robust Construction
Corrosion-resistant 316L stainless steel diaphragm
IP65-rated enclosure with CNEX explosion-proof Ex ia IIC T6 Ga rating
Resistant to vibration (up to 10g at 55Hz–2kHz)
Applications of the CNXPT Industrial Pressure Transmitter
Wide Industry Compatibility
Industrial Use Cases
Petroleum and chemical processing
Metallurgy and power generation
Hydrology and environmental monitoring
Specialized Fields
Marine and aviation systems
Hydraulic and pneumatic control systems
This transmitter is especially suited for measuring non-corrosive gases and liquids compatible with 316L stainless steel.
Performance Specifications of the CNXPT Pressure Transmitter
Electrical and Measurement Specifications
| Parameter | Specification |
|---|---|
| Pressure Range | -1 Bar to 1000 Bar |
| Pressure Type | Gauge, Absolute, Sealed |
| Accuracy | ±0.25% (typical), ±0.5% (max) |
| Output Signals | 4–20mA, 0–10mA, 0–10V, 0.5–4.5V, RS485 |
| Supply Voltage | 5–30VDC depending on output |
| Temperature Compensation | 0–70°C (≤10MPa, customizable) |
Temperature and Durability Ratings
Operating Temp: -20°C to 80°C
Storage Temp: -40°C to 120°C
Zero Drift: ±0.02% F.S./°C (≤100kPa)
Material: Housing - 304/316L; Diaphragm - 316L
Configuration and Customisation
Ordering Options
When configuring a CNXPT pressure transmitter, consider the following:
Output Signals
4–20mA (D1)
0.5–4.5VDC (S7)
RS485 Communication (custom option)
Pressure Connections
G1/4, G1/2, M20×1.5, 7/16-20UNF
Electrical Connections
Hirschmann
Sealed cable
PG7 plug
Industrial casing (with or without display)
Selection Example
CNXPT 0–35Bar D1 S1 J1 B G
Translates to:
Range: 0–35 Bar
Power: 24VDC
Signal: 4–20mA
Connection: M20×1.5
Electrical: Hirschmann
Pressure Type: Gauge
Best Practices for Installation and Use
Important Safety and Compatibility Notes
Do not touch the isolation diaphragm with hard objects.
Ensure grounded wiring and lightning protection for outdoor installations.
For low temperatures (below -20°C), use EPDM O-rings.Cable length defaults to 1.5m with polyethylene insulation, unless otherwise specified.
Conclusion: Why Choose the CNXPT Pressure Transmitter?
The CNXPT is an ideal choice for professionals in industrial automation, fluid control, and engineering systems seeking a durable, high-accuracy pressure transmitter. With flexible configuration options and excellent long-term performance, it stands as a reliable, customizable solution for a broad range of applications.
Understanding Pressure Measurement Types
1. Gauge Pressure (G or GP)
Measures pressure relative to atmospheric pressure. Zero gauge pressure means it's equal to the current atmospheric pressure. Common in everyday applications like car tires and water pumps.
Example: If a tire reads 35 psi (gauge), the actual pressure is 35 psi above atmospheric pressure (~14.7 psi at sea level), so the absolute pressure is 49.7 psi.
2. Absolute Pressure (A or AP)
Measures pressure relative to a perfect vacuum (0 psi). Doesn't change with altitude or weather, making it ideal for scientific research or altitude-sensitive processes.
Example: A vacuum chamber showing 0 psi (absolute) is a true vacuum. If the ambient atmospheric pressure is 14.7 psi, and a process is at atmospheric pressure, it will read 14.7 psi (absolute).
3. Sealed Gauge Pressure (SG or SGauge)
Measures pressure relative to a fixed (sealed) atmospheric pressure—usually sealed at 1 atm (14.7 psi). Works like gauge pressure but doesn't adjust with changes in local atmosphere (like elevation or weather).
Example: Bringing a sealed gauge transmitter from sea level to a mountain still assumes 1 atm = 14.7 psi, even though the actual atmosphere might be lower.
Why Choose Our Pressure Transmitters?
With a full stainless steel design, wide operating range, and field-proven sensing technology, our pressure transmitters are the go-to solution for engineers and system integrators who demand top-tier performance in real-world conditions.
For more technical specifications, certifications, or customization options, contact us today or request a product datasheet.