Products

Electronic Differential Pressure Transmitter / Level Meter

Categories Electronic Differential Pressure Transmitters, Pressure Transmitters

Electronic Differential Pressure Transmitter / Level Meter

The electronic differential pressure transmitter / level meter is an ADDA-P-ERS smart electronic differential pressure transmitter for level measurement in petroleum, chemical, food, beverage, pharmaceutical, and bioengineering fields. Features include HART or RS485 output, IP67 protection, and 10kPa to 4MPa range.

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-ERS smart electronic differential pressure transmitter is designed for petroleum, chemical, food, beverage, pharmaceutical, and bioengineering applications. It features an all-stainless-steel or aluminum alloy structure and a dot-matrix LCD module that supports 355° rotation.

Uses monocrystalline silicon piezoresistive technology or E+H ceramic capacitive technology for stable performance. Individual transmitter accuracy is up to 0.075%F.S., with combined accuracy up to 0.1%F.S.
Hygienic design complies with EHEDG, 3A, FDA, and GMP requirements.
Wetted material surface roughness down to Ra 0.4
Supports CIP-SIP cleaning, with temperature resistance up to 150 degrees C
Uses a high-performance EMC protection circuit module to reduce electromagnetic interference with the output.
High stability: ±0.2% Span /5 years
Designed for challenging level measurement in tall vessels and towers, especially applications where capillary length exceeds 15 m.
Eliminating the capillary reduces response time by over 80%, improves measurement accuracy, and reduces temperature drift effects by over 70%.
Components can be replaced without recalibration or system reconfiguration.
Reduces spare parts inventory requirements by allowing individual system components to be replaced as needed.
Requires no freeze protection or heat tracing, helping save energy.

Applications

Level measurement in petroleum, chemical, food, beverage, pharmaceutical, bioengineering, and other sanitary applications.

Measuring Medium

Media compatible with the wetted materials.

Performance Specifications

Accuracy	±0.1%, ±0.2% Upper Range Limit, see specifications for details
Range	10kPa~4MPa, 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, the 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

Range (C: Ceramic Capacitive Sensor)

Pressure Type	Nominal Range	Minimum Range	Lower Range Limit (LRL)	Upper Range Limit (URL)	Overload*
G	10kPa	2kPa	-10kPa	10kPa	400kPa
20kPa	5kPa	-20kPa	20kPa	600kPa
50kPa	10kPa	-50kPa	50kPa	600kPa
100kPa	20kPa	-100kPa	100kPa	1MPa
200kPa	40kPa	-100kPa	200kPa	1.8MPa
400kPa	80kPa	-100kPa	400kPa	2.5MPa
1MPa	200kPa	-100kPa	1MPa	4MPa
2MPa	400kPa	-100kPa	2MPa	4MPa
4MPa	800kPa	-100kPa	4MPa	6MPa
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 *The overload values refer to the maximum overload range of the sensor. The maximum overload range of the transmitter ultimately depends on the pressure rating of the process connection.

Range (D: Monocrystalline Silicon Sensor)

Pressure Type	Nominal Range	Minimum Range	Lower Range Limit (LRL)	Upper Range Limit (URL)	Overload*
G	40kPa	10kPa	-40kPa	40kPa	1MPa
250kPa	50kPa	-100kPa	250kPa	4MPa
1MPa	200kPa	-100kPa	1MPa	6MPa
3MPa	600kPa	-0.1MPa	3MPa	15MPa
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 *The overload values refer to the maximum overload range of the sensor. The maximum overload range of the transmitter ultimately depends on the pressure rating of the process connection.

Accuracy

Linear Output Accuracy	G	TD<=5	±0.2% Span	<=20kPa
Based on standards and reference test conditions, including best fit straight line (BFSL), hysteresis, repeatability. Calibration temperature :20 degrees C ±5 degrees C.
±0.1% Span	≥50kPa
Note: TD (Turn down) means turndown ratio , TD= maximum range / current range

Ambient Temperature Influence

Sensor Type	Influencing Quantity	Range
C	± (0.1+0.015TD) % 20 degrees C of Span	<=20kPa
± (0.1+0.005TD) % 20 degrees C of Span	≥50kPa
D	± (0.1+0.025TD) % 20 degrees C of Span	40kPa
± (0.1+0.015TD) % 20 degrees C of Span	250kPa, 1MPa, 3MPa

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	Monocrystalline silicon sensor, standard-temperature silicone oil: -40~150 degrees C, sanitary fill oil: -20 degrees C ~150 degrees C, High-temperature silicone oil: 0~315 degrees C
Ceramic capacitive sensor: -40 degrees C ~130 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

Product Categories

Quick Contact

Case Showcase

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.

Adda

Products

Electronic Differential Pressure Transmitter / Level Meter