The Additel ADT 783-D Differential Pressure Controller is a high-performance automated pneumatic pressure controller designed for precise differential pressure calibration in professional laboratories, production environments and automated test systems. Combining fast pressure control, interchangeable ADT151 reference pressure modules and advanced automation capabilities, the ADT 783-D provides an efficient solution for demanding differential and low-pressure calibration applications.
The maximum pressure control range extends from:
-14.35 to +35 psi
or approximately:
-0.99 to +2.5 bar
The ADT 783-D is specifically designed as the:
Differential Pressure
configuration of the ADT783 series.
Depending on the installed ADT151 differential pressure module, Additel specifies pressure accuracy of:
0.05 % FS for DP2 to DP5 modules
or:
0.02 % FS for DP10 to DP1K modules
Pressure control stability is specified as:
<0.003 % FS
with typical performance of:
0.001 % FS
Under Additel’s specified test conditions, pressure control response time is:
<10 seconds
Two interchangeable internal ADT151 pressure module bays provide flexible range selection and allow the controller to be adapted to different differential pressure calibration requirements.
For professional calibration and metrological traceability of pressure controllers, differential pressure instruments, pressure modules, transmitters and sensors, visit the europascal calibration service.
Your Benefits at a Glance
The Additel ADT 783-D Differential Pressure Controller provides:
- Automated pneumatic differential pressure control
- Pressure range from -0.99 to +2.5 bar
- Pressure range from -14.35 to +35 psi
- Differential pressure configuration
- Accuracy of 0.05 % FS with DP2 to DP5 modules
- Accuracy of 0.02 % FS with DP10 to DP1K modules
- Control stability <0.003 % FS
- Typical control stability of 0.001 % FS
- Pressure control response time <10 seconds
- Two interchangeable internal ADT151 pressure module bays
- Automatic or fixed range selection
- Fast, Standard and Custom control modes
- Maximum overshoot <1 % FS
- Maximum external load volume of 1,000 ml
- External clean and dry air or nitrogen supply
- Maximum supply pressure of 4 bar
- Optional Contamination Prevention System
- 6 mm Festo pressure connection
- Integrated pressure port filtration
- Modern touchscreen operation
- Remote control capability
- Modbus support
- Suitable for professional laboratory and automated calibration systems
Automatic Differential Pressure Control
The Additel ADT 783-D is the differential pressure configuration within the ADT783 pressure controller family.
The maximum control range extends from approximately:
-0.99 to +2.5 bar
or:
-14.35 to +35 psi
Differential pressure is defined as the difference between two pressures:
Δp = pHigh – pLow
This type of measurement is widely used in process instrumentation, HVAC systems, filter monitoring, flow measurement and industrial pressure measurement.
The ADT 783-D automatically generates, regulates and stabilizes the required differential pressure, significantly reducing the manual work associated with conventional pressure calibration systems.
Pressure Accuracy
The pressure accuracy of the Additel ADT 783-D depends on the selected ADT151 differential pressure module.
Additel specifies:
0.05 % FS for DP2 to DP5
and:
0.02 % FS for DP10 to DP1K
This distinction is particularly important when configuring the controller.
The smallest differential pressure modules are optimized for very low pressure measurement and control, while higher-range DP modules provide an improved percentage-of-full-scale accuracy specification.
Selecting a suitable pressure module therefore plays an important role in matching the ADT 783-D to the required calibration range.
Precision Specifications
Additel also distinguishes between precision and accuracy.
For the ADT 783-D, the specified precision is:
0.025 % FS for DP2 to DP5
and:
0.015 % FS for DP10 to DP1K
According to Additel, precision includes error components such as:
- Linearity
- Hysteresis
- Repeatability
- Resolution
- Temperature compensation
The accuracy specification additionally includes reference standard measurement uncertainty and annual drift.
This distinction is important when evaluating the complete metrological performance of the controller.
Excellent Pressure Control Stability
The pressure control stability of the ADT 783-D is specified as:
<0.003 % FS
with typical performance of:
0.001 % FS
This high level of stability is particularly valuable for differential pressure calibration because even small pressure fluctuations can affect sensitive differential pressure transmitters and sensors.
Additional stabilization time may be required to achieve the typical 0.001 % FS performance, depending on the pressure level and system configuration.
Pressure Control in Less Than 10 Seconds
The Additel ADT 783-D provides fast automatic pressure control.
Additel specifies a control response time of:
<10 seconds
under defined test conditions.
The manufacturer’s response-time specification is based on an external load volume of 50 ml, a 20 % pressure step and the time required to reach 0.005 % FS stability.
This fast response can significantly reduce the total time required for multipoint calibration procedures.
Two Interchangeable ADT151 Pressure Modules
The ADT 783-D provides:
two interchangeable internal pressure module bays
for Additel ADT151 differential pressure modules.
The high-pressure bay supports:
DP40 through DP1K
while the low-pressure bay supports:
DP20 through DP1K
This allows different pressure ranges to be combined within a single pressure controller.
The modular design is particularly useful for calibration laboratories that work with differential pressure instruments covering different measuring ranges.
Automatic or Fixed Range Selection
The ADT 783-D supports:
Fixed
and:
Auto
range selection.
With two suitable ADT151 modules installed, the controller can select the appropriate reference range for the required pressure.
This allows one ADT 783-D system to cover different differential pressure calibration applications without relying on only one full-scale pressure range.
Why Multiple Pressure Modules Matter
A calibration laboratory may need to calibrate differential pressure instruments with significantly different ranges.
Examples include:
- Low-pressure sensors
- HVAC transmitters
- Filter monitoring transmitters
- Differential pressure gauges
- Process differential pressure transmitters
Using a pressure module whose range is appropriately matched to the device under test can improve the absolute measurement capability.
The two-module architecture of the ADT 783-D therefore provides an important advantage for professional calibration laboratories.
External Pneumatic Pressure Supply
The Additel ADT 783-D uses an:
external air source
for pressure generation.
The permitted pressure medium is clean and dry:
Air or Nitrogen
The external pressure source provides the pneumatic energy while the ADT 783-D automatically controls and stabilizes the required pressure.
This architecture is optimized for stationary laboratory and automated calibration applications.
Maximum Supply Pressure of 4 bar
Additel specifies a maximum supply pressure of:
4 bar
for the ADT 783-D.
For optimum control performance, Additel recommends adjusting the air source pressure according to the range of the installed internal pressure control module.
A suitable pressure source and pressure safety system should always be used according to the required operating range.
6 mm Festo Pressure Connection
Unlike the 1K, 3.6K and 6K configurations, which use 1/4 BSP male pressure connections, the ADT 783-D uses:
6 mm Festo
pressure connections.
This distinction is important when planning the pneumatic setup and selecting suitable tubing and adapters.
Integrated Port Filters
All pressure ports incorporate:
40 to 100 µm filters
to help prevent particles from entering the pressure controller.
Clean pneumatic connections are particularly important for maintaining reliable operation of the controller, valves and reference pressure modules.
Optional Contamination Prevention System
An optional:
Contamination Prevention System (CPS)
is available for the ADT 783-D.
The CPS can help protect the controller when devices under test may contain contamination such as:
- Moisture
- Oil
- Particles
- Process residues
Preventing contamination from entering the pressure controller helps maintain reliable long-term operation and metrological performance.
Fast, Standard and Custom Control Modes
The ADT 783-D provides three pressure control modes:
Fast
Standard
and:
Custom
These modes allow the control behavior to be adapted to the connected device, pressure range and calibration setup.
This flexibility is particularly useful when different test volumes or sensitive differential pressure instruments require different control characteristics.
Maximum Overshoot <1 % FS
Additel specifies maximum pressure overshoot of:
<1 % FS
Controlled pressure approach helps protect sensitive devices under test and supports reliable automated calibration sequences.
Load Volumes up to 1,000 ml
The ADT 783-D supports an external load volume of up to:
1,000 ml
The actual pressure response time depends on factors including:
- Connected volume
- Pressure range
- Pressure step
- Supply pressure
- Control mode
- Required stability
For the fastest calibration cycle, the pneumatic volume between controller and device under test should generally be kept as small as practical.
Differential Pressure Transmitter Calibration
One of the primary applications for the Additel ADT 783-D is differential pressure transmitter calibration.
Differential pressure transmitters are commonly used to measure:
- Flow
- Filter pressure drop
- Tank level
- Process pressure differences
- Airflow
- Ventilation pressure
The ADT 783-D automatically provides the required reference differential pressure while the output of the transmitter can be evaluated using suitable external measurement equipment.
HVAC Applications
Differential pressure plays an important role in:
- Heating systems
- Ventilation systems
- Air-conditioning systems
- Building automation
- Filter monitoring
- Airflow measurement
The ADT 783-D provides automated pressure control for calibration of the associated sensors, transmitters and differential pressure gauges.
Filter Monitoring
Differential pressure is frequently used to determine the condition of filters.
The pressure difference between the upstream and downstream sides of a filter increases as the filter becomes contaminated.
Accurate calibration of the associated differential pressure transmitter is therefore important for reliable filter monitoring.
The ADT 783-D can automatically generate defined pressure differences for these calibration procedures.
Flow Measurement Applications
Differential pressure is also widely used for flow measurement.
Typical primary flow elements include:
- Orifice plates
- Venturi tubes
- Flow nozzles
- Pitot tubes
These devices create a pressure difference related to flow rate.
The ADT 783-D can be used to calibrate the differential pressure measurement instrumentation associated with such systems.
Automated Calibration
The Additel ADT 783-D is particularly suitable for automated multipoint calibration.
A typical procedure can contain:
- Zero pressure
- Increasing differential pressure points
- Maximum calibration pressure
- Decreasing pressure points
- Return to zero
The controller automatically approaches and stabilizes each pressure point.
This reduces manual adjustment and improves repeatability during repetitive calibration procedures.
Remote Operation
The ADT783 platform supports remote operation for integration into automated calibration systems.
The pressure controller can therefore be incorporated into:
- Calibration software
- Automated test benches
- Production test systems
- Laboratory automation
- Custom measurement systems
This makes the ADT 783-D suitable for both standalone laboratory operation and fully automated calibration workflows.
Modbus Support
Additel provides:
Modbus commands
for the ADT773, ADT783 and ADT793 pressure controller platforms.
This allows the ADT 783-D to be integrated into compatible industrial automation and laboratory control systems.
Technical Highlights
Model: Additel ADT 783-D
Device type: Automated Differential Pressure Controller
Pressure range: -14.35 to +35 psi
Pressure range: -0.99 to +2.5 bar
Pressure type: Differential
Gauge/absolute switching: Optional with reference atmospheric pressure module
Accuracy DP2–DP5: 0.05 % FS
Accuracy DP10–DP1K: 0.02 % FS
Precision DP2–DP5: 0.025 % FS
Precision DP10–DP1K: 0.015 % FS
Control stability: <0.003 % FS
Typical control stability: 0.001 % FS
Control response time: <10 seconds under specified conditions
Internal pressure module bays: 2
High-pressure bay: DP40–DP1K
Low-pressure bay: DP20–DP1K
Range selection: Fixed or Auto
Control modes: Fast, Standard, Custom
Maximum overshoot: <1 % FS
Maximum load volume: 1,000 ml
Pressure medium: Clean, dry air or nitrogen
Pressure supply: External
Maximum supply pressure: 4 bar
Pressure connection: 6 mm Festo
Port filtration: 40–100 µm
Contamination Prevention System: Optional
Remote operation: Yes
Modbus: Supported
Technical Data
| Feature | Additel ADT 783-D |
|---|---|
| Device type | Automated Differential Pressure Controller |
| Pressure range | -14.35 to +35 psi |
| Pressure range | -0.99 to +2.5 bar |
| Pressure type | Differential |
| Gauge/absolute switching | Optional |
| Accuracy DP2–DP5 | 0.05 % FS |
| Accuracy DP10–DP1K | 0.02 % FS |
| Precision DP2–DP5 | 0.025 % FS |
| Precision DP10–DP1K | 0.015 % FS |
| Control stability | <0.003 % FS |
| Typical control stability | 0.001 % FS |
| Response time | <10 s |
| Internal module bays | 2 |
| High-pressure modules | DP40–DP1K |
| Low-pressure modules | DP20–DP1K |
| Range selection | Fixed / Auto |
| Control modes | Fast / Standard / Custom |
| Maximum overshoot | <1 % FS |
| Maximum load volume | 1,000 ml |
| Pressure medium | Clean, dry air or nitrogen |
| Maximum supply pressure | 4 bar |
| Pressure port | 6 mm Festo |
| Port filter | 40–100 µm |
| CPS | Optional |
| Modbus | Supported |
ADT 783-D vs. ADT 783-1K
The ADT 783-D and ADT 783-1K are designed for different pressure measurement applications.
| Feature | ADT 783-D | ADT 783-1K |
|---|---|---|
| Maximum pressure | 2.5 bar | 70 bar |
| Minimum pressure | -0.99 bar | -0.99 bar |
| Primary pressure type | Differential | Gauge |
| Control stability | <0.003 % FS | <0.003 % FS |
| Typical stability | 0.001 % FS | 0.001 % FS |
| Response time | <10 s | <10 s |
| Internal module bays | 2 | 2 |
| Maximum supply pressure | 4 bar | 80 bar |
| Pressure connection | 6 mm Festo | 1/4 BSP male |
The ADT 783-D should be selected when differential pressure capability is the primary requirement.
The ADT 783-1K is designed for substantially higher gauge pressures up to 70 bar.
ADT 783 Series Overview
The Additel ADT783 family provides four main pressure configurations.
| Model | Maximum Pressure | Primary Pressure Type |
|---|---|---|
| ADT 783-D | 35 psi / 2.5 bar | Differential |
| ADT 783-1K | 1,000 psi / 70 bar | Gauge |
| ADT 783-3.6K | 3,600 psi / 250 bar | Gauge |
| ADT 783-6K | 6,000 psi / 420 bar | Gauge |
The ADT 783-D is therefore the dedicated differential pressure configuration within the ADT783 family.
The higher-pressure ADT 783-1K, ADT 783-3.6K and ADT 783-6K models are primarily designed for gauge pressure applications.
Typical Applications
The Additel ADT 783-D Differential Pressure Controller is particularly suitable for:
- Differential pressure transmitter calibration
- Differential pressure gauge calibration
- Low-pressure sensor calibration
- Pressure transducer calibration
- HVAC instrumentation
- Filter monitoring systems
- Airflow measurement instrumentation
- Process differential pressure measurement
- Automated calibration systems
- Production pressure testing
- Research and development
- Quality assurance
- Pressure laboratory automation
Typical users include:
- Professional calibration laboratories
- ISO/IEC 17025 calibration laboratories
- HVAC calibration laboratories
- Process industry
- Pharmaceutical industry
- Cleanroom operators
- Instrument manufacturers
- Quality assurance departments
- Research laboratories
- Production test facilities
Calibration and Service by europascal
Differential pressure calibration places particularly high demands on stable pressure generation, suitable reference ranges and a well-designed pneumatic setup.
The interchangeable ADT151 pressure modules should therefore be included in the calibration strategy according to the ranges actually used.
Tubing, pressure connections, reference levels and pneumatic volumes should also be considered when evaluating the complete measurement uncertainty.
The europascal calibration service provides professional calibration solutions for pressure controllers, differential pressure instruments, pressure modules, transmitters, sensors and pressure gauges.
europascal can also support customers in selecting suitable ADT151 differential pressure modules, accessories and system configurations for the ADT 783-D.
Why Choose the Additel ADT 783-D?
The Additel ADT 783-D Precise Differential Pressure Controller combines automated pneumatic pressure control from approximately -0.99 to +2.5 bar with interchangeable ADT151 differential pressure reference modules and excellent pressure control performance.
Depending on the selected module, Additel specifies accuracy of 0.05 % FS for DP2 to DP5 modules or 0.02 % FS for DP10 to DP1K modules.
Pressure control stability is <0.003 % FS, with typical performance of 0.001 % FS, while the specified control response time is less than 10 seconds under Additel’s defined test conditions.
Two interchangeable internal pressure module bays, fixed or automatic range selection, three pressure control modes, optional contamination protection, remote operation and Modbus support make the ADT 783-D an excellent solution for professional differential pressure calibration.
Looking for a fast and precise automated differential pressure controller up to 2.5 bar? Contact europascal for expert advice on the Additel ADT 783-D, suitable ADT151 differential pressure modules, accessories and professional calibration services.
Further Additel pressure controllers and calibrators from europascal can be found here.
Professional pressure calibration services from europascal can be found here.
Manufacturer information about the Additel ADT 783-D can be found on the official Additel website.
