Additel ADT 918 is a powerful pneumatic pressure test pump designed for professional pressure calibration from 95% vacuum to 1,500 psi / 100 bar. The hand-operated pump combines an exceptionally wide pneumatic pressure range with fine adjustment down to 10 Pa / 0.1 mbar, excellent pressure stability and convenient hand-tight quick connectors. This makes the Additel ADT 918 an ideal pressure source for calibrating pressure gauges, pressure transmitters, pressure sensors, pressure switches and other pneumatic pressure measuring instruments.
The Additel ADT 918 uses air as the pressure medium and requires no electrical power or external compressed-air supply. Pressure is generated directly using the operating lever, while a high-quality screw press enables precise adjustment of individual calibration points.
A specially designed shut-off valve helps maintain stable pressure during calibration. The integrated gas-liquid isolator protects the internal pump mechanism against moisture and dirt, helping to reduce maintenance requirements. For applications with special cleanliness requirements, Additel also offers the possibility of ordering a dedicated oil-free configuration.
Two hand-tight quick connectors allow a reference pressure instrument and the device under test to be connected directly to the pump. Compatible instruments can be installed and removed without PTFE tape or conventional wrenches.
At europascal, the Additel ADT 918 complements a comprehensive portfolio of professional pressure generation and calibration equipment. In addition to supplying high-quality calibration technology, europascal provides accredited calibration services for pressure and other measurement quantities. Find more information about professional calibration and metrological traceability at the europascal Calibration Service.
Your Benefits at a Glance
The Additel ADT 918 combines a wide pneumatic pressure range, precise adjustment and portable construction in one professional manual pressure source.
Key advantages include:
- Pressure generation from 95% vacuum to 1,500 psi / 100 bar
- Vacuum and positive pressure generation with one pump
- Fine adjustment down to 10 Pa / 0.1 mbar
- Air as pressure medium
- Completely hand-operated pressure generation
- No electrical power required
- No external compressed-air supply required
- Direct pressure generation using the operating lever
- High-quality screw press for fine pressure adjustment
- Special shut-off valve for excellent pressure stability
- Integrated gas-liquid isolator
- Protection against moisture and dirt
- Two hand-tight quick connectors
- Simultaneous connection of reference and test instrument
- No PTFE tape or conventional wrenches required for compatible connections
- NPT, BSP and M20 × 1.5 pressure port options
- Stainless steel and aluminum construction
- Portable design
- Weight approximately 2.6 kg
- Minimal maintenance
- Optional carrying case and accessories
- Oil-free configuration available by special order
- Ideal for professional comparison pressure calibration
Pneumatic Pressure Generation up to 100 bar
The Additel ADT 918 covers an exceptionally broad pressure range for a portable manual pneumatic pressure pump.
The generated pressure range extends from:
95% vacuum
to:
1,500 psi / 100 bar positive pressure.
This allows a single pressure pump to cover vacuum, low-pressure, medium-pressure and demanding pneumatic high-pressure applications.
The ability to generate up to 100 bar using air is particularly useful for calibration laboratories and field technicians who want to avoid hydraulic pressure media whenever possible.
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
- Precision pressure indicators
The broad operating range can significantly reduce the number of separate pressure pumps required at a calibration workstation.
Vacuum Generation up to 95%
The Additel ADT 918 is not limited to positive pressure generation.
It can also generate up to:
95% vacuum.
This allows vacuum and compound pressure instruments to be tested with the same pressure source that is used for positive pressures up to 100 bar.
Typical applications include:
- Vacuum gauges
- Compound pressure gauges
- Vacuum transmitters
- Vacuum switches
- Pressure sensors
The combination of vacuum generation and high positive pneumatic pressure provides exceptional flexibility for professional calibration applications.
Fine Adjustment Down to 10 Pa
Accurate pressure calibration requires precise control of the generated pressure.
The Additel ADT 918 incorporates a high-quality screw press for fine pressure adjustment.
Additel specifies an adjustment resolution down to:
10 Pa
or:
0.1 mbar.
The operator first approaches the required calibration pressure using the main pressure generation mechanism.
The screw press can then be used to precisely adjust the final pressure.
This combination provides efficient pressure generation together with fine control of individual calibration points.
Excellent Pressure Stability
Once the desired calibration pressure has been reached, pressure stability is essential for accurately comparing the reference instrument with the device under test.
The Additel ADT 918 therefore incorporates a specially designed shut-off valve.
This valve helps maintain the generated pressure as stable as possible during calibration.
Stable pressure conditions are particularly important when working with:
- High-resolution digital pressure gauges
- Precision pressure references
- Pressure transmitters
- Sensitive pressure sensors
- Pressure switches
After reaching the desired pressure point, sufficient stabilization time should always be allowed before recording measurement values.
Easy Manual Pressure Generation
The Additel ADT 918 is completely hand operated.
Pressure is generated directly using the operating lever.
The general operating sequence is straightforward:
Generate the approximate pressure using the lever.
Approach the required calibration point.
Use the precision screw press for fine adjustment.
Allow the pressure to stabilize.
Compare the device under test with the reference instrument.
This straightforward operating principle makes the pump suitable for both experienced calibration technicians and routine pressure calibration applications.
Air as Pressure Medium
The Additel ADT 918 uses:
air
as its pressure medium.
This is a significant advantage for pressure instruments that should not come into contact with hydraulic oil.
The pneumatic operating principle also reduces the amount of cleaning and maintenance associated with hydraulic pressure generation equipment.
For applications with specific oil-free requirements, Additel recommends contacting the manufacturer regarding the appropriate special-order configuration.
Integrated Gas-Liquid Isolator
Pressure instruments from industrial processes can contain small amounts of moisture or contamination.
The Additel ADT 918 therefore incorporates an integrated:
gas-liquid isolator.
This component helps prevent moisture and dirt from entering the internal pump mechanism.
Protecting the internal pneumatic components helps reduce maintenance requirements and supports reliable long-term operation.
This feature is especially useful in calibration laboratories where instruments from many different industrial applications are tested.
Hand-Tight Quick Connectors
Two hand-tight quick connectors are installed on the Additel ADT 918.
One connection is used for the:
reference pressure instrument
and the second is used for the:
device under test.
Compatible instruments can be connected and disconnected without PTFE tape or conventional wrenches.
This significantly simplifies instrument changes during routine calibration work.
For calibration laboratories processing several pressure instruments per day, the hand-tight connection concept can reduce setup time considerably.
Different Pressure Port Options
The Additel ADT 918 is available with different pressure port configurations.
Available versions 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 configured for different international pressure connection standards.
Suitable adapters and fitting sets are also available when the reference instrument or device under test uses another connection type.
Professional Comparison Calibration
The Additel ADT 918 is designed as a professional comparison pressure test pump.
A typical calibration setup consists of:
Additel ADT 918 + Reference Pressure Instrument + Device Under Test
The reference instrument and device under test are connected simultaneously to the two pressure ports.
The ADT 918 generates the required pressure.
The operator then uses the fine adjustment mechanism to accurately approach the desired calibration point.
After sufficient stabilization, the indication of the device under test is compared with the traceable reference pressure.
This procedure can be repeated at several increasing and decreasing pressure points according to the selected calibration procedure.
Pressure Gauge Calibration
The Additel ADT 918 is particularly suitable as a manual pneumatic pressure source for pressure gauge calibration.
Typical devices include:
- Mechanical pressure gauges
- Digital pressure gauges
- Vacuum gauges
- Compound pressure gauges
- Precision pressure indicators
The pump generates pressure but does not itself provide the traceable reference pressure value.
For professional calibration, the ADT 918 is therefore combined with an appropriate reference pressure instrument.
The achievable measurement uncertainty depends on the selected reference standard, environmental conditions, pressure stability, calibration procedure and other contributions included in the measurement uncertainty budget.
Pressure Transmitter Calibration
The Additel ADT 918 can also provide the pneumatic pressure source required for pressure transmitter calibration.
The pump generates the required input pressure while a suitable reference pressure instrument measures the actual applied pressure.
The transmitter output can simultaneously be measured using a suitable process calibrator or precision multimeter.
For many industrial pressure transmitters, the output signal is:
4 to 20 mA.
Several increasing and decreasing pressure points can be generated to evaluate the relationship between applied pressure and electrical output.
Pressure Switch Testing
The Additel ADT 918 can also be used as a pressure source for pressure switch testing.
Pressure is gradually increased until the switch changes state.
The pressure can then be reduced until the switch resets.
Combined with a suitable reference pressure instrument and electrical switch detector, this allows determination of:
- Switching pressure
- Reset pressure
- Switching hysteresis
The fine adjustment mechanism makes it easier to accurately approach the switching point.
Pneumatic High-Pressure Calibration
With a maximum positive pressure of 1,500 psi / 100 bar, the Additel ADT 918 enters a pressure range where hydraulic pressure pumps are often used.
The ability to generate these pressures pneumatically can provide an important advantage for instruments that should remain free from hydraulic oil.
Typical applications include:
- High-pressure pneumatic gauges
- Pneumatic pressure transmitters
- Industrial pressure sensors
- Pressure switches
- Test and measurement systems
- Calibration laboratory applications
All pressure connections, hoses and adapters used with the system must be appropriately rated for the applied pressure.
Robust Construction
The Additel ADT 918 is designed for professional laboratory and field use.
The ram and adapters are manufactured from:
stainless steel.
The body combines:
stainless steel and aluminum.
The sealing system uses materials selected for pneumatic pressure generation.
This robust construction supports reliable operation while keeping the pump sufficiently light for portable use.
Compact and Portable
Despite its maximum positive pressure of 100 bar, the Additel ADT 918 weighs only approximately:
5.7 lb / 2.6 kg.
Its dimensions are approximately:
140 mm high
with a base measuring approximately:
315 × 198 mm.
The stable base provides a practical platform for pressure generation and fine adjustment.
At the same time, the relatively low weight makes the pump convenient to transport between different calibration locations.
No External Power Required
The Additel ADT 918 is completely manually operated.
It requires:
no electrical power
and:
no external compressed-air supply.
This independence is especially valuable for field calibration.
A technician can create a complete manual calibration setup using the ADT 918, an appropriate reference pressure instrument, the device under test and suitable adapters.
Minimal Maintenance
The Additel ADT 918 is designed for minimal maintenance.
The integrated gas-liquid isolator protects the pump against moisture and dirt, while pneumatic operation eliminates hydraulic fluid during standard use.
Additel also offers a dedicated:
ADT 918-MK maintenance kit.
Clean pressure connections, correct operation and appropriate storage help maintain reliable performance throughout the lifetime of the pump.
Accessories for the Additel ADT 918
Several accessories are available for the ADT 918.
These include:
- Additel ADT 102 adapter and fitting set
- Additel ADT 103 hand-tight adapter set
- Additel ADT 100-HTK-8K flexible hose test kit
- Additel 9904-918 carrying case
- Additel ADT 918-MK maintenance kit
The flexible hose kit provides additional flexibility when larger instruments or devices with inconveniently positioned pressure ports need to be calibrated.
The ADT 918 SET configuration includes the pump and carrying case.
Technical Highlights
| Feature | Additel ADT 918 |
|---|---|
| Device type | Pneumatic pressure test pump |
| Pressure medium | Air |
| Vacuum generation | Up to 95% vacuum |
| Positive pressure | Up to 1,500 psi / 100 bar |
| Adjustment resolution | 10 Pa / 0.1 mbar |
| Pressure generation | Manual lever |
| Fine adjustment | High-quality screw press |
| Shut-off valve | Yes |
| Gas-liquid isolator | Integrated |
| Instrument connections | 2 hand-tight quick connectors |
| Pressure port options | NPT, BSP or M20 × 1.5 |
| Ram and adapters | Stainless steel |
| Body | Stainless steel and aluminum |
| Height | Approx. 140 mm |
| Base | Approx. 315 × 198 mm |
| Weight | Approx. 2.6 kg |
| Oil-free configuration | Available by special order |
| External pressure source | Not required |
| Electrical power | Not required |
| Maintenance | Minimal |
Additel ADT 918 vs. Additel ADT 917
The Additel ADT 918 and Additel ADT 917 are both manual pneumatic pressure test pumps designed for professional comparison calibration.
The main difference is the maximum positive pressure.
The Additel ADT 917 provides pressure generation from 95% vacuum up to:
1,000 psi / 70 bar.
The Additel ADT 918 extends the positive pressure range to:
1,500 psi / 100 bar.
Both pumps provide fine pressure adjustment down to:
10 Pa / 0.1 mbar.
The ADT 918 is therefore particularly suitable when pneumatic calibration pressures above 70 bar are required.
For users who want to cover vacuum through to 100 bar while continuing to use air instead of a hydraulic medium, the ADT 918 provides an exceptionally versatile manual pressure source.
Typical Applications
The Additel ADT 918 is suitable for:
- Pneumatic pressure calibration
- High-pressure pneumatic calibration
- Vacuum calibration
- Pressure gauge calibration
- Digital pressure gauge calibration
- Compound pressure gauge calibration
- Pressure transmitter calibration
- Pressure sensor testing
- Pressure switch testing
- Comparison pressure calibration
- Laboratory calibration
- Field calibration
- Industrial maintenance
- Service applications
- Pneumatic test systems
- Research and development
Why Choose the Additel ADT 918?
The Additel ADT 918 combines an exceptionally wide pneumatic pressure range with precise adjustment, stable operation and portable construction.
Its pressure range from 95% vacuum to 1,500 psi / 100 bar enables one manual pump to cover a broad variety of pneumatic pressure calibration applications.
A high-quality screw press provides fine adjustment down to 10 Pa / 0.1 mbar, while the specially designed shut-off valve helps maintain stable pressure during calibration.
The integrated gas-liquid isolator protects the internal pump mechanism against moisture and dirt, helping reduce maintenance requirements.
Two hand-tight quick connectors simplify the connection of the reference pressure instrument and device under test without requiring PTFE tape or conventional wrenches.
NPT, BSP and M20 × 1.5 configurations provide compatibility with common international pressure connection standards.
At only approximately 2.6 kg, the pump remains highly portable despite its maximum positive pressure of 100 bar.
Because the ADT 918 is completely manually operated, no electrical power or external compressed-air source 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 918 is available on the official Additel ADT 918 product documentation.
