Product Guarantees FAQ
Introduction
Adopting mature high-precision sensing technology, this coplanar pressure transmitter covers measuring ranges from 20 mbar to 100 bar with segmented minimum span, LRL/URL limit values and unilateral overload protection clearly defined for each grade. It provides superior accuracy of ±0.05%/±0.075% URL when TD ≤ 5, with dedicated accuracy formulas for higher turndown ratios, meeting high-standard process measurement requirements.
Boasting outstanding long-term stability of ±0.2% SPAN per decade, the device quantifies temperature drift, supply voltage drift and mounting position influence with fixed compensation coefficients; position-induced deviation can be eliminated via on-site zero reset. It has passed eight full EMC interference immunity tests complying with IEC international standards, guaranteeing stable signal output in complex industrial electromagnetic environments.
The transmitter outputs standard 4–20 mA DC analog signal integrated with HART protocol, supporting two sets of power supply specifications for standard and intrinsically safe applications separately, with clear load resistance limits and maximum 1000m signal transmission distance. IP67 ingress protection ensures stable operation within wide ambient temperature and humidity ranges, while diverse fill fluids expand its adaptability to high/low temperature corrosive media. The sensor and electronic damping time are separately configurable, paired with definite turn-on, reset and response time indicators, making it easy for system integration and on-site commissioning in differential pressure flow measurement, tank liquid level detection and closed-loop process control loops.
Technical Data
1. Range Specifications & Overload
| Nominal Range | Minimum Range | LRL | URL | Line Pressure Range | One-sided High Pressure Overload | One-sided Low Pressure Overload |
|---|---|---|---|---|---|---|
| 20 mbar | 2 mbar | -20 mbar | 20 mbar | 420 bar | 250 bar | 250 bar |
| 60 mbar | 2 mbar | -60 mbar | 60 mbar | 420 bar | 250 bar | 250 bar |
| 0.4 bar | 4 mbar | -0.4 bar | 0.4 bar | 420 bar | 250 bar | 250 bar |
| 2.5 bar | 25 mbar | -2.5 bar | 2.5 bar | 420 bar | 250 bar | 250 bar |
| 10 bar | 0.1 bar | -10 bar | 10 bar | 420 bar | 250 bar | 250 bar |
| 30 bar | 0.3 bar | -30 bar | 30 bar | 420 bar | 250 bar | 250 bar |
| 100 bar | 1 bar |
-3 MPa (-30 bar) |
100 bar | 420 bar | 200 bar | 200 bar |
Range Setting Rule:
If URV ≥ LRV, URV shall be greater than the minimum pressure.
If URV ≤ LRV, LRV shall be greater than the minimum pressure.
2. Linear Output Accuracy (By Turn Down Ratio)
| Turn Down Ratio | Nominal Range | Accuracy |
|---|---|---|
| TD ≤ 5 | 20 mbar, 60 mbar, 100 bar | ±0.075% |
| TD ≤ 5 | 0.4 bar, 2.5 bar, 10 bar, 30 bar | ±0.05%, ±0.075% |
| TD ＞ 5 | 20 mbar, 60 mbar | ±(0.001 + 0.0148TD) % |
| TD ＞ 5 | 0.4 bar, 2.5 bar, 10 bar, 30 bar, 100 bar | ±(0.0275 + 0.0095TD) % |
3. General Performance
| Item | Specification |
|---|---|
| Overall Measuring Range | 20 mbar ~ 100 bar |
| Max. Turn Down Ratio | 100:1 |
| Long-term Stability | ±0.2% SPAN / 10 years |
| Ambient Temperature Effect | At 60 mbar: (0.1+0.05TD)% SPAN per 10°COther ranges: (0.075+0.0375TD)% SPAN per 10°C |
| Supply Voltage Effect | Zero & span shift ≤ ±0.005% SPAN/V (18.3 V ~ 44 V DC) |
| Mounting Position Effect | ＜ 4 mbar at any position, resettable via zero trim |
| Vibration Resistance | ＜ 0.1% SPAN (GB/T18271.3 / IEC61298-3) |
| Output Signal | 4~20 mA DC, HART protocol |
| Protection Class | IP67 |
| Weight | Approx. 4 kg |
4. Environmental Conditions
| Item | Specification |
|---|---|
| Operating Temperature | -50°C ~ 85°C (without LCD)-40°C ~ 70°C (with LCD) |
| Storage Temperature | -50°C ~ 100°C (without LCD)-40°C ~ 85°C (with LCD) |
| Sensor Operating Temperature | -40°C ~ 105°C |
| Medium Temperature (Fill Fluid) |
Silicone oil: -40°C ~ 200°C Fluorocarbon oil 1: -20°C ~ 110°C Low temperature silicone oil: -55°C ~ 200°C Fluorocarbon oil 2: -55°C ~ 85°C |
| Operating Humidity | 5%RH ~ 100%RH @ 40°C |
5. Power Supply & Load
| Item | Specification |
|---|---|
| Power Supply (Standard HART) | 18.3 V ~ 44 V DC |
| Power Supply (Intrinsically Safe HART) | 18.3 V ~ 30 V DC |
| Load Resistance (General) | 0 Ω ~ 1476 Ω |
| Load Resistance (HART Communication) | 250 Ω ~ 800 Ω |
| Max. Signal Transmission Distance | ＜ 1000 m (twisted pair cable) |
| Power Consumption | ≤ 500 mW @ 24 V DC, 20.8 mA |
6. EMC Immunity & Interference Test
| No. | Test Item | Standard | Test Condition | Result / Class |
|---|---|---|---|---|
| 1 | Radiated Interference (Housing) | GB/T 9254.1 / CISPR 32 | 30 MHz ~ 1000 MHz | Qualified |
| 2 | Conducted Interference (DC Port) | GB/T 9254.1 / CISPR 32 | 0.15 MHz ~ 30 MHz | Qualified |
| 3 | Electrostatic Discharge Immunity | GB/T 17626.2 / IEC 61000-4-2 | 8 kV (contact), 15 kV (air) | Class B |
| 4 | RF Electromagnetic Field Immunity | GB/T 17626.3 / IEC 61000-4-3 | 10 V/m (80 MHz ~ 1 GHz) | Class A |
| 5 | Power Frequency Magnetic Field Immunity | GB/T 17626.8 / IEC 61000-4-8 | 30 A/m | Class B |
| 6 | Electrical Fast Transient Burst | GB/T 17626.4 / IEC 61000-4-4 | 4 kV (5/50 ns, 100 kHz) | Class B |
| 7 | Surge Immunity | GB/T 17626.5 / IEC 61000-4-5 | 2 kV (line-line), 4 kV (line-ground, 1.2/50 μs) | Class B |
| 8 | Conducted RF Disturbance Immunity | GB/T 17626.6 / IEC 61000-4-6 | 3 V (150 kHz ~ 80 MHz) | Class A |
Note: Class A = No performance deviation; Class B = Temporary deviation, automatic recovery.
7. Static Pressure Influence
| Measuring Range | Static Pressure Deviation |
|---|---|
| Range ≤ 0.1 bar | δ ≤ ±0.5% F.S. / 100 bar |
| 0.1 bar ＜ Range ≤ 0.4 bar | δ ≤ ±0.1% F.S. / 100 bar |
| 2.5 bar ≤ Range ≤ 10 bar | δ ≤ ±0.075% F.S. / 100 bar |
| 30 bar ≤ Range ≤ 100 bar | δ ≤ ±0.15% F.S. / 100 bar |
8. Time Response Parameters
| Item | Specification |
|---|---|
| Total Damping Time | Combined response of electronic unit and sensor module |
| Electronic Damping Time | 0 s ~ 100 s (configurable) |
| Sensor Damping Time | ≤ 0.2 s (isolated diaphragm + filled oil) |
| Turn-on Time | ≤ 6 s |
| Factory Reset Time | ≤ 31 s |
| Response Time | ≤ 100 ms |
Features
- Enhanced Performance with Microprocessor Design
Built-in microprocessor greatly improves operational flexibility and expands functional capabilities, supporting diversified configuration and on-site adaptation.
- Independent Zero & Span Adjustment
Zero and span can be calibrated separately without mutual interference, enabling convenient and accurate on-site parameter setting.
- Dual Local & Remote Calibration
Equipped with complete local operation and remote configuration functions. It works perfectly with HART terminals for remote debugging.
- HART Compliant Two-wire Design
Standard two-wire system fully compatible with HART protocol. Data communication will not interrupt the 4–20 mA output signal, ensuring stable data transmission in control systems.
- High Precision & Flexible Performance
Delivers excellent measurement accuracy and long-term operational stability. Damping is fully adjustable to filter signal fluctuation; it also features strong resistance to unidirectional overload for harsh pipeline conditions.
- Vibration Resistant & Low Maintenance
No moving mechanical parts inside the structure. It is robust against vibration and requires minimal routine maintenance, cutting long-term operating costs.
- Custom Wetted Materials & All-weather Operation
Multiple optional wetted diaphragm materials suit different process media. With IP67 protection and optional explosion-proof design, it can operate reliably indoors and outdoors all year round.
- Powerful Self-diagnostics
Integrated comprehensive self-diagnostic functions to monitor operating status in real time and quickly locate potential faults.
Product Applications
1. Internal Structure & Signal Processing
This coplanar pressure transmitter consists of a high-precision smart sensor and an intelligent main control circuit board.
The smart sensor integrates a capacitive sensing element, measuring diaphragm detection circuit, temperature sensor and built-in temperature compensation circuit, to capture and calibrate pressure signals accurately.
Equipped with a microprocessor and peripheral circuits, the main control board converts raw pressure signals into standard 4~20 mA DC output, and realizes stable HART protocol communication for remote configuration and data transmission.
Please refer to the drawing below for overall structure and installation dimensions:
2. Industrial Application Scenarios
This high-performance pressure & differential pressure transmitter is widely used across oil & gas, chemical, storage and laboratory fields:
- Offshore & Onshore Oil & Gas Industry
It is commonly applied to monitor differential pressure of pressure-sensitive equipment during offshore drilling and oil exploration, as well as onshore petrochemical and gas production facilities. Stable and accurate pressure monitoring keeps the whole production process safe, stable and efficient.
- Fluid Storage & Transportation
For industrial storage and transport equipment, precise pressure monitoring maintains media in optimal status, ensuring safety during delivery and final on-site usage.
- Laboratory Research
The transmitter is also adopted in laboratories to measure relative pressure between vacuum chambers and atmospheric pressure, supporting various scientific research projects.
Product Guarantees
All our pressure transmitter models are certified with ECM (EN IEC 61326-1:2021) and PED. The products fully comply with EU industrial safety rules and international electromagnetic compatibility standards for reliable field application.
FAQ
Q1: What are the core advantages of this coplanar pressure transmitter?
A1: It features an integrated coplanar structure and built-in microprocessor. It supports independent zero and span adjustment, offers a 100:1 ultra-wide turndown ratio and high accuracy up to ±0.05% URL. With adjustable damping, strong unidirectional overload resistance and no moving parts, it is vibration-proof and maintenance-free for complex industrial conditions.
Q2: What range and accuracy does this transmitter support?
A2: It covers a measuring range of 20 mbar to 100 bar with complete segmented range parameters. It achieves ±0.05%/±0.075% URL high precision (TD ≤5) and adopts segmented accuracy formulas for higher turndown ratios. It also delivers stable performance with ±0.2% SPAN 10-year long-term stability.
Q3: Does it support HART communication and dual calibration?
A3: Yes. This two-wire transmitter is fully HART-compatible. It supports both remote HART debugging and local on-site calibration. Digital communication does not interrupt 4~20mA DC output, enabling flexible and accurate parameter setup.
Q4: What certifications and standards does it comply with?
A4: Our full-range pressure transmitters hold ECM and PED certifications. ECM performance conforms to EN IEC 61326-1:2021 electromagnetic compatibility standard, while PED certification meets EU pressure equipment safety directives for global compliant deployment.
Q5: Can it adapt to high and low temperature medium conditions?
A5: Yes. Multiple fill fluid options are available for different temperature scenarios, covering -55°C to 200°C. Built-in temperature sensing and automatic compensation effectively eliminate temperature drift, ensuring stable measurement in extreme ambient and medium environments.
Q6: What are the power and load requirements for installation?
A6: It supports dual DC power supplies: 18.3V~44V DC (standard HART) and 18.3V~30V DC (intrinsically safe HART). The load resistance is 0~1476Ω for general use and 250~800Ω for stable HART communication, with a max 1000m signal transmission distance.
Q7: Is the transmitter anti-interference and vibration-resistant?
A7: Yes. It passes 8 professional EMC tests for anti-static, anti-surge and anti-radio frequency interference, adapting to complex electromagnetic industrial environments. It features ＜0.1% SPAN vibration resistance and IP67 protection for harsh outdoor and workshop use.
Q8: Will static pressure affect measurement accuracy?
A8: Static pressure error is strictly controlled by segmented standards with minimal deviation. Its optimized coplanar structure resists static pressure impact, and position deviation within 4mbar can be eliminated via on-site zero reset.
Q9: What industries and scenarios is it suitable for?
A9: It is widely used for differential pressure monitoring in offshore drilling, onshore petrochemical and gas industries. It also applies to industrial fluid storage and transportation, as well as vacuum chamber pressure testing for laboratory research.
Q10: Does the transmitter need frequent maintenance?
A10: No frequent maintenance is needed. Free of mechanical moving parts, it is robust, vibration-resistant and durable. Built-in self-diagnostic function monitors real-time operating status and quickly locates faults, greatly reducing maintenance costs.
Q11: Can response and damping speed be adjusted?
A11: Yes. The electronic damping time is 0~100s configurable for filtering pressure fluctuations. It has a fast sensor damping time ≤0.2s and overall response time ≤100ms, meeting diverse control system speed requirements.
Q12: What warranty and technical support do you provide?
A12: We offer a 12-month product warranty covering manufacturing defects with free repair and replacement. Full-life remote technical support is provided for model selection, installation guidance, calibration and daily debugging.
Share your working conditions and requirements, we will offer professional solutions and official quotation.
Hot Tags: coplanar pressure transmitter, China coplanar pressure transmitter manufacturers, suppliers, factory, Coplanar Pressure Transmitter, Submersible Pressure Transmitter, pressure measurement, In-line Pressure Transmitter
