Additel ADT 914A is a portable pneumatic pressure test pump designed for professional pressure calibration from 95% vacuum to 375 psi / 25 bar. With manual pressure generation, fine adjustment down to 10 Pa / 0.1 mbar, excellent pressure stability and practical hand-tight quick connectors, the ADT 914A provides a versatile pressure source for calibrating pressure gauges, transmitters, sensors, switches and other pneumatic pressure instruments.
The Additel ADT 914A uses clean air as the pressure medium and requires no electrical power or external compressed-air supply. A manual hand pump provides efficient coarse pressure generation, while a high-quality screw press enables precise adjustment of individual calibration points.
A specially designed shut-off valve isolates the calibration volume from the pressure generation system and helps maintain stable pressure during calibration. An integrated gas-liquid isolator protects the internal pump mechanism against moisture and contamination from devices under test.
Two hand-tight quick connectors allow a reference pressure instrument and the device under test to be connected simultaneously without PTFE tape or conventional wrenches. With a weight of only approximately 1.5 kg, the ADT 914A is particularly suitable for mobile calibration and service applications.
At europascal, the Additel ADT 914A complements a comprehensive portfolio of professional pressure generation and calibration equipment. In addition to supplying calibration technology, europascal provides accredited calibration services for pressure measuring instruments. Find more information about professional calibration and metrological traceability at the europascal Calibration Service.
Your Benefits at a Glance
The Additel ADT 914A combines a wide pneumatic pressure range, precise adjustment and highly portable construction.
Key benefits include:
- Pneumatic pressure test pump
- Pressure generation from 95% vacuum to 375 psi / 25 bar
- Vacuum and positive pressure generation
- Fine adjustment down to 10 Pa / 0.1 mbar
- Air as pressure medium
- Fully manual operation
- No electrical power required
- No external compressed-air supply required
- Manual hand pump for coarse pressure generation
- High-quality screw press for fine pressure adjustment
- Special shut-off valve for excellent pressure stability
- Integrated gas-liquid isolator
- Protection against moisture and contamination
- Two hand-tight quick connectors
- Reference and test instrument can be connected simultaneously
- No PTFE tape or conventional wrenches required for compatible connections
- NPT, BSP and M20 × 1.5 versions available
- Compact and portable design
- Weight only approximately 1.5 kg
- Minimal maintenance
- Optional carrying case and accessories
- Ideal for laboratory and field calibration
Pneumatic Pressure Generation up to 25 bar
The Additel ADT 914A provides a broad pneumatic pressure generation range from:
95% vacuum
to:
375 psi / 25 bar positive pressure.
This allows one manual pressure pump to cover vacuum, low-pressure and medium pneumatic pressure applications.
The wide range is particularly useful for calibration laboratories and service technicians who work with many different pressure instruments.
Typical devices under test include:
- Analog pressure gauges
- Digital pressure gauges
- Vacuum gauges
- Compound pressure gauges
- Pressure transmitters
- Pressure sensors
- Pressure switches
- Pneumatic process instruments
The ability to generate both vacuum and positive pressure significantly increases the versatility of the pump.
95% Vacuum Generation
The Additel ADT 914A is not limited to positive pressure.
It can also generate up to:
95% vacuum.
A dedicated pressure/vacuum selector allows the operator to change between positive pressure and vacuum generation.
This makes the pump suitable for testing instruments that operate below atmospheric pressure.
Typical vacuum applications include:
- Vacuum gauges
- Compound pressure gauges
- Vacuum transmitters
- Pressure sensors
- Vacuum switches
The pressure/vacuum selector must be operated correctly and should not be switched while the pump is under pressure.
Fine Adjustment Down to 10 Pa
Precise calibration requires more than simply generating pressure.
The pressure must also be adjusted accurately to the required calibration point.
The Additel ADT 914A therefore incorporates a high-quality screw press for fine pressure adjustment.
Additel specifies an adjustment resolution down to:
10 Pa
or:
0.1 mbar.
After the operator has generated the approximate pressure using the hand pump, the fine adjustment mechanism can be used to approach the desired calibration point accurately.
This two-stage concept provides efficient pressure generation together with precise final adjustment.
Excellent Pressure Stability
Once a calibration point has been reached, stable pressure is essential for comparing the reference instrument with the device under test.
The Additel ADT 914A incorporates a specially designed shut-off valve.
The valve isolates the calibration volume from the pressure generation system during calibration.
This helps maintain stable pressure while the reference and test instrument readings are recorded.
Pressure stability is particularly important when calibrating high-resolution digital pressure gauges and transmitters where small pressure changes may be visible immediately on the display.
Manual Hand Pump
The Additel ADT 914A uses a manual hand pump for efficient pressure generation.
This provides several practical advantages.
No electrical supply is required.
No external compressed-air cylinder or compressor is required.
The pump can therefore be used almost anywhere.
For mobile calibration work, this independence from external utilities is a significant advantage.
The hand pump is used for coarse pressure generation, while the screw press is used for fine adjustment.
Together, these controls provide a convenient and intuitive method for setting calibration pressures.
Air as Pressure Medium
The Additel ADT 914A uses:
air
as the pressure medium.
No hydraulic oil is required for normal operation.
This makes the pump particularly suitable for pneumatic instruments and helps prevent oil contamination of pressure gauges, sensors and transmitters.
Pneumatic operation also simplifies routine maintenance compared with hydraulic pressure generation equipment.
For applications requiring specifically oil-free operation, the exact requirements should be discussed with Additel or europascal.
Integrated Gas-Liquid Isolator
A device under test can contain moisture, dirt or other contamination from its previous industrial application.
The Additel ADT 914A therefore incorporates a:
gas-liquid isolator.
This component helps protect the pump from moisture and contamination entering from connected instruments.
Protecting the internal pneumatic components reduces maintenance requirements and supports reliable long-term operation.
Any accumulated moisture or contamination should be removed according to the manufacturer’s operating instructions.
Hand-Tight Quick Connectors
The Additel ADT 914A provides two practical hand-tight connectors.
One port is used for the:
reference pressure instrument
and the second port is used for the:
device under test.
Compatible instruments can be connected and disconnected without PTFE tape or conventional wrenches.
This is particularly convenient in calibration laboratories where multiple devices must be calibrated consecutively.
The hand-tight connection concept reduces setup time and makes changing instruments considerably easier.
Multiple Pressure Connections
The Additel ADT 914A is available with several pressure port options.
Available configurations include:
- 1/4 NPT female
- 1/2 NPT female
- 1/4 BSP female
- 1/2 BSP female
- M20 × 1.5 female
This allows the pump to be adapted to different international connection standards.
Additional adapter sets are available for instruments using different pressure connections.
Professional Comparison Calibration
The Additel ADT 914A is designed as a comparison pressure test pump.
A typical calibration setup consists of:
Additel ADT 914A + Reference Pressure Instrument + Device Under Test
Both measuring instruments are connected to the pump.
The operator generates the required pressure manually and then uses the fine adjustment mechanism to accurately approach the desired calibration point.
Once the pressure is sufficiently stable, the indication of the device under test is compared with the traceable reference value.
This procedure can be repeated at multiple increasing and decreasing pressure points according to the required calibration procedure.
Pressure Gauge Calibration
The Additel ADT 914A is particularly suitable for calibrating pneumatic pressure gauges up to 25 bar.
The pump itself generates the pressure but does not determine the traceable pressure value.
For calibration, it is therefore combined with an appropriate reference pressure instrument.
Typical calibration applications include:
- Mechanical pressure gauges
- Digital pressure gauges
- Vacuum gauges
- Compound pressure gauges
- Low-pressure measuring instruments
The achievable measurement uncertainty depends primarily on the selected reference standard, environmental conditions, pressure stability and calibration procedure.
Pressure Transmitter Calibration
The Additel ADT 914A can also provide the pneumatic pressure source for pressure transmitter calibration.
A reference pressure instrument and transmitter are connected to the pump.
The ADT 914A generates the required input pressure while the reference instrument determines the actual pressure value.
The transmitter output can simultaneously be measured with a suitable process calibrator or multimeter.
For a conventional industrial pressure transmitter, the output is commonly:
4 to 20 mA.
This setup allows the relationship between input pressure and electrical output signal to be tested at several calibration points.
Pressure Switch Testing
The Additel ADT 914A can also generate pressure for pressure switch testing.
The pressure is gradually increased until the switch changes state.
The pressure can then be reduced until the switch resets.
Combined with a suitable reference instrument and electrical switch detector, this allows determination of:
- Switching pressure
- Reset pressure
- Switching hysteresis
The fine pressure adjustment helps accurately determine the switching points.
Compact and Portable Design
One of the major advantages of the Additel ADT 914A is its portability.
The pump weighs only approximately:
3.3 lb / 1.5 kg.
Its dimensions are approximately:
240 × 120 × 130 mm.
This compact construction makes the pump easy to transport between calibration locations.
Despite its low weight, the base provides a stable platform for pressure generation and fine adjustment.
The ADT 914A is therefore equally suitable for a calibration laboratory, maintenance workshop or mobile service case.
No External Power Required
The Additel ADT 914A is completely manually operated.
It requires:
no electrical power
and:
no external compressed-air supply.
This is especially useful for field calibration.
The technician only needs the pump, a suitable reference pressure instrument, the device under test and the necessary adapters.
This independent operating concept simplifies calibration work in locations where electrical power or compressed-air supplies are unavailable.
Minimal Maintenance
The Additel ADT 914A is designed for minimal maintenance.
Air is used as the pressure medium, eliminating the need for hydraulic fluid during normal operation.
The integrated gas-liquid isolator helps protect internal components against moisture and dirt.
Additel also provides a dedicated maintenance kit for the ADT 914A.
Correct operation, clean connections and proper storage in a dry and non-corrosive environment help maintain reliable performance throughout the lifetime of the pump.
Safety Pressure
The normal generated pressure range of the Additel ADT 914A is:
95% vacuum to 375 psi / 25 bar.
Additel specifies a safety pressure limit of:
1,000 psi / 70 bar.
This safety pressure must not be confused with the normal operating range.
The ADT 914A is designed to generate a maximum normal positive pressure of 375 psi / 25 bar.
The normal specified operating range should always be observed during calibration.
Accessories
A range of accessories is available for the Additel ADT 914A.
These include:
- Additel ADT 102 adapter and fitting set
- Additel ADT 103 hand-tight adapter set
- Flexible pressure hose test kits
- Carrying case
- Maintenance kit
- Replacement O-rings
The ADT 914A SET configuration includes a carrying case suitable for the pump and pressure gauges.
These accessories allow the pump to be adapted to a wide variety of pressure instruments and connection standards.
Technical Highlights
| Feature | Additel ADT 914A |
|---|---|
| Device type | Handheld pneumatic pressure test pump |
| Pressure medium | Air |
| Vacuum generation | Up to 95% vacuum |
| Positive pressure | Up to 375 psi / 25 bar |
| Fine adjustment | 10 Pa / 0.1 mbar |
| Pressure generation | Manual hand pump |
| Fine control | High-quality screw press |
| Shut-off valve | Yes |
| Gas-liquid isolator | Integrated |
| Instrument ports | 2 hand-tight connectors |
| Connections | NPT, BSP or M20 × 1.5 |
| Piston volume | Approx. 27 ml |
| Dimensions | Approx. 240 × 120 × 130 mm |
| Weight | Approx. 1.5 kg |
| Safety pressure | <1,000 psi / 70 bar |
| External pressure source | Not required |
| Electrical power | Not required |
| Maintenance | Minimal |
Additel ADT 914A vs. Additel ADT 912A
The Additel ADT 914A and Additel ADT 912A are both manual pneumatic pressure test pumps, but they are optimized for different pressure ranges.
The Additel ADT 912A provides pressure generation from:
95% vacuum to 60 psi / 4 bar
and offers extremely fine adjustment down to:
0.1 Pa / 0.001 mbar.
The Additel ADT 914A extends the positive pressure range significantly to:
375 psi / 25 bar.
Its fine adjustment resolution is:
10 Pa / 0.1 mbar.
The ADT 912A is therefore optimized for particularly sensitive low-pressure calibration, while the ADT 914A provides a much broader positive pneumatic pressure range in an exceptionally compact and portable package.
Typical Applications
The Additel ADT 914A is suitable for:
- Pneumatic pressure calibration
- Vacuum calibration
- Pressure gauge calibration
- Digital pressure gauge calibration
- Compound pressure gauge calibration
- Pressure transmitter calibration
- Pressure sensor testing
- Pressure switch testing
- Comparison calibration
- Field calibration
- Calibration laboratories
- Industrial maintenance
- Service applications
- Pneumatic test systems
- Research and development
Why Choose the Additel ADT 914A?
The Additel ADT 914A provides an excellent combination of pressure range, precise adjustment and portability.
Its operating range from 95% vacuum to 375 psi / 25 bar allows one manual pump to cover a broad variety of pneumatic pressure instruments.
A high-quality screw press provides fine adjustment down to 10 Pa / 0.1 mbar, while the dedicated shut-off valve helps maintain stable pressure during calibration.
The integrated gas-liquid isolator protects the pump against moisture and contamination from connected instruments.
Two hand-tight quick connectors simplify installation of the reference pressure instrument and device under test without requiring PTFE tape or conventional wrenches.
At only approximately 1.5 kg, the ADT 914A is highly portable and ideal for mobile calibration work.
Because pressure is generated manually using air, neither electrical power nor an external compressed-air supply is required.
At europascal, we provide Additel pressure generation and calibration technology for professional laboratory, industrial and field applications. The portfolio includes manual pneumatic and hydraulic pressure pumps, digital pressure gauges, pressure calibrators, pressure modules and automated pressure calibration systems.
For professional calibration and metrological traceability of pressure measuring instruments, visit the europascal Calibration Service.
Further Additel products are available from europascal.
Manufacturer information about the Additel ADT 914A is available on the official Additel website.
