Products

Smart Differential Pressure Transmitter

Categories Pressure Transmitters, Smart Industrial Transmitters

Smart Differential Pressure Transmitter

The ADDA-P Series smart differential pressure transmitter uses monocrystalline silicon MEMS sensing technology with static pressure and temperature compensation. Applications include pressure, level, differential pressure, density, interface, and flow measurement. Refer to the pressure-type and range tables for configuration-specific accuracy and output options.

Authoritative Qualification Certifications

We hold ISO quality certification, national high-tech enterprise qualification, China measuring instrument type approval, and explosion-proof and safety certifications to support reliable product quality.

Custom Engineering

Configurable materials, connections, signals, displays, and installation solutions for different process environments.

Product Features

The ADDA-P Series uses a monocrystalline silicon sensor chip manufactured with advanced German MEMS technology and a dual-beam suspended design. It provides high accuracy, high overpressure resistance, and stable performance. An embedded signal processing module combines static pressure and temperature compensation to maintain measurement accuracy and long-term stability across a wide range of pressure and temperature conditions.

Monocrystalline silicon piezoresistive technology provides stable performance and accuracy up to 0.075%F.S.
Turndown ratio up to 100 : 1.
A high-performance EMC protection circuit module reduces the influence of electromagnetic interference on the output.
High stability: ±0.2% Span/5 years.

Applications

Pressure, level, differential pressure, density, interface, and flow measurement.

Measuring Medium

Media compatible with the wetted materials.

Performance Specifications

Accuracy	±0.075%, ±0.1%, ±0.2% Upper Range Limit, see specifications for details
Range	6kPa~40MPa, see selection table for details
Annual Stability	±0.2%Span/5 years
Ambient Temperature Influence	see specifications for details
Voltage Influence	When the supply voltage varies within 10.5V/16.5V~36V DC, changes in zero point and span shall not exceed ±0.001%URL/V
Mounting Position Influence	Transmitter installation may cause zero error, this error can be corrected by zero adjustment, with no effect on accuracy
Vibration Influence	Tested according to GB/T18271.3/IEC61298-3 test, < 0.1%
Output Signal	4mA~20mADC+HART Modbus-RTU/RS485
Protection Grade	IP67

Pressure Type	Differential Pressure	Gauge Pressure	Absolute Pressure
Range	50Pa-10MPa	200Pa-40MPa	2kPa-10MPa
Output Signal	4-20mA, 4-20mA+HART, Modbus-RTU/RS485, and other options
Reference Accuracy	±0.075% Upper Range Limit, optional ±0.05% Upper Range Limit, see specifications for details	±0.15% Upper Range Limit, optional ±0.1% Upper Range Limit, see specifications for details

Differential Pressure Range

Nominal Range	Minimum Range	Lower Range Limit (LRL)	Upper Range Limit (URL)	Static Pressure Range	High-Side Overload	Low-Side Overload
6kPa	50Pa	-6kPa	6kPa	25MPa	25MPa	16MPa
40kPa	400Pa	-40kPa	40kPa	40MPa	25MPa	16MPa
250kPa	2.5kPa	-250kPa	250kPa	40MPa	25MPa	500kPa
1MPa	10kPa	-500kPa	1MPa	40MPa	25MPa	500kPa
3MPa	30kPa	-500kPa	3MPa	40MPa	25MPa	500kPa
10MPa	100kPa	-500kPa	10MPa	40MPa	25MPa	500kPa
High and low limit setting requirements: lower range value (LRV) and upper range value (URV) must be set within the lower and upper range limits, ｜URV-LRV｜≥ Minimum Range

Gauge Pressure Range

Nominal Range	Minimum Range	Lower Range Limit (LRL)	Upper Range Limit (URL)	Overload
6kPa	50Pa	-6kPa	6kPa	25MPa
40kPa	400Pa	-40kPa	40kPa	25MPa
250kPa	2.5kPa	-100kPa	250kPa	25MPa
1MPa	10kPa	-100kPa	1MPa	25MPa
3MPa	30kPa	-100kPa	3MPa	25MPa
10MPa	100kPa	-100kPa	10MPa	25MPa
40MPa	400kPa	-100kPa	40MPa	42MPa
High and low limit setting requirements: lower range value (LRV) and upper range value (URV) must be set within the lower and upper range limits, ｜URV-LRV｜≥ Minimum Range

Absolute Pressure Range

Nominal Range	Minimum Range	Lower Range Limit (LRL)	Upper Range Limit (URL)	Overload
40kPa	2kPa	0kPa	40kPa	500kPa
250kPa	12.5kPa	0kPa	250kPa	4MPa
1MPa	50kPa	0kPa	1MPa	6MPa
3MPa	150kPa	0kPa	3MPa	10MPa
10MPa	500kPa	0kPa	10MPa	20MPa
High and low limit setting requirements: lower range value (LRV) and upper range value (URV) must be set within the lower and upper range limits, ｜URV-LRV｜≥ Minimum Range

Accuracy

Linear Output Accuracy	D/G	TD<=5	±0.075% Span
Based on standards and reference test conditions , including best fit straight line (BFSL), hysteresis, repeatability. Calibration temperature :20 degrees C ±5 degrees C .
TD>5	±(0.002+0.015TD)% Span
A	TD<=5	±0.2% Span	40kPa
±0.1% Span	250kPa, 1MPa, 3MPa, 10MPa
TD>5	±(0.005+0.035TD) % Span	40kPa
±(0.005+0.02TD) % Span	250kPa, 1MPa, 3MPa, 10MPa
Note : TD (Turn down) means turndown ratio , TD= maximum range / current range .

Ambient Temperature Influence

6kPa	± (0.1+0.005TD)%/20 degrees C of Span
40kPa , 250kPa, 1MPa, 3MPa, 10MPa	± (0.075+0.005TD)%20 degrees C of Span

Environmental Conditions

Hazardous Area	PCEC	Certificate No.: CE20.2148X Certificate No.: CE23.0612X Ex ia IIC T6 Ga Ex db IIC T6 Gb Ex tb IIIC T80 degrees C Db
Item	Condition
Operating Ambient Temperature Range	-40 degrees C ~85 degrees C, LCD display: -20 degrees C ~70 degrees C
Storage Ambient Temperature Range	-40 degrees C ~100 degrees C, LCD display: -40 degrees C ~85 degrees C
Measured Medium Temperature Range	Silicone oil filling: -40 degrees C ~85 degrees C
Inert filling liquid: -20 degrees C ~80 degrees C
Operating Ambient Humidity Range	5%RH~100%RH@40 degrees C

Time Specifications

Total damping time constant: equals the sum of the electronic circuit component damping time constant and sensor capsule damping time constant

Electronic circuit component damping time: 0s~99s adjustable range

Overall response time: <= 90ms

Electromagnetic Compatibility Environment (current signal only)

No.	Test Item	Basic Standard	Test Condition	Performance Level
1	Radiated Disturbance (Enclosure)	GB/T 9254.1/CISPR22	30MHz-1000MHz	B (Note 2)
2	Conducted Disturbance (DC Power Port)	GB/T 9254.1/CISPR22	0.15MHz-30MHz	B (Note 2)
3	Electrostatic Discharge (ESD) Immunity	GB/T 17626.2/IEC61000-4-2	4kV (contact), 8kV (air)	A (Note 1)
4	RF Electromagnetic Field Immunity	GB/T 17626.3/IEC61000-4-3	10V/m (80MHz-1GHz)	A (Note 1)
5	Power Frequency Magnetic Field Immunity	GB/T 17626.8/IEC61000-4-8	30A/m	A (Note 1)
6	Electrical Fast Transient/Burst Immunity	GB/T 17626.4/IEC61000-4-4	2kV (5/50ns, 100kHz)	A (Note 1)
7	Surge Immunity	GB/T 17626.5/IEC61000-4-5	4kV (line-to-line) 2kV (line-to-ground)	A (Note 1)
8	Conducted Disturbance Immunity Induced by RF Fields	GB/T 17626.6/IEC61000-4-6	3V (150kHz-80MHz)	A (Note 1)
Note 1: For performance level A, performance remains normal within the technical specification limits Note 2: For performance level B, function or performance may temporarily decrease or be lost, but can recover automatically, actual operating status, storage and data remain unchanged

Power Supply and Load Conditions

Item	Operating Condition
Power Supply Voltage	HART communication protocol: 16.5V~36V DC
Intrinsically safe version: HART communication protocol: 18.5V~28V DC
Modbus-RTU/RS485: 12V~36V DC
Load Resistance	0Ω~2119Ω during operation 250Ω~600Ω for HART communication
Transmission Distance	< 1000m
Power Consumption
4mA~20mA	<= 500mW@24V DC, 20.8mA
Modbus-RTU/RS485	<= 240mW@24V DC, 10mA

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Frequently Asked Questions

Find quick answers about product selection, customization, technical parameters, delivery, and support for ADDA industrial measurement instruments.

What information should I provide before selecting an instrument?

Please provide the measured medium, measuring range, process temperature, process pressure, connection type, output signal, power supply, installation environment, and communication method if remote monitoring is required.

Can ADDA customize instruments for specific applications?

Yes. ADDA can provide customized solutions based on measuring range, process connection, wetted material, display type, communication protocol, installation method, and working environment.

Are your instruments suitable for hazardous areas?

Many ADDA instruments are available with explosion-proof or intrinsically safe configurations. Please confirm the site classification and certification requirements before selection.

What industries are your products used in?

Yes. Our team can help recommend a suitable instrument configuration after reviewing your application conditions, including medium, range, connection, output signal, and installation requirements.

Do you provide technical support for product selection?

Lead time depends on product type, quantity, customization requirements, and certification needs. Standard products usually have a shorter delivery time, while customized models may require additional production time.

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Smart Differential Pressure Transmitter