Additel ADT 992 is a versatile handheld pneumatic pressure test pump designed for professional pressure calibration from 95% vacuum to 700 psi / 50 bar. Combining a dual-stage pre-pressure piston, lever-type pressurization and a precise fine adjustment screw, the pump provides efficient pressure generation while remaining compact and portable. With a weight of only 3.5 lb / 1.6 kg, the Additel ADT 992 is particularly well suited for field calibration, maintenance applications and mobile calibration services.

Unlike hydraulic high-pressure pumps, the Additel ADT 992 uses air as its pressure medium. This makes it ideal for calibrating pneumatic pressure gauges, digital pressure gauges, pressure transmitters, pressure sensors, pressure switches and other pressure measuring instruments where a clean pneumatic pressure source is required.

A major feature of the ADT 992 is its dual-stage pressure generation system. The design enables the operator to generate relatively high pneumatic pressures with less effort than conventional handheld pressure pumps. Lever-type pressurization provides efficient pressure generation and quick stabilization, while the fine adjustment screw allows the final calibration pressure to be set precisely.

The ADT 992 also offers exceptional flexibility during field use. Its adjustable reference port, longitudinal design and dual rubber grips allow the pump to be used in different operating positions. This makes the pump particularly practical when calibrations must be performed directly at an installation or in locations where space is limited.

At europascal, the Additel ADT 992 complements a comprehensive portfolio of professional pressure generation and calibration equipment. In addition to supplying Additel pressure 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 992 combines a broad pneumatic pressure range with low operating effort, precise adjustment and excellent portability.

Key advantages include:

• Pneumatic pressure generation from 95% vacuum to 700 psi / 50 bar
• Air as pressure medium
• Dual-stage pre-pressure piston
• Higher pressure generation with reduced operating effort
• Lever-type pressurization
• Fast pressure generation and stabilization
• Fine adjustment screw
• Adjustment resolution of 10 Pa / 0.1 mbar
• Pressure increase of approximately 30 psi / 2 bar per lever stroke
• Maximum load volume of 35 ml
• Fine adjustment volume up to 7.2 ml
• Multiple operating positions
• Adjustable reference port
• Dual rubber grips
• Hand-tight quick connector for the device under test
• Integrated port filtration
• Compact handheld construction
• Weight of only approximately 1.6 kg
• No electrical power required
• Low maintenance requirements
• Suitable for laboratory and field calibration

Pneumatic Pressure Generation up to 50 bar

The Additel ADT 992 provides a generated pressure range from:

95% vacuum

to:

700 psi / 50 bar.

This broad range enables both vacuum and positive-pressure calibration with the same portable pressure source.

Typical devices under test include:

• Analog pressure gauges
• Digital pressure gauges
• Vacuum gauges
• Compound pressure gauges
• Pressure transmitters
• Pressure sensors
• Pressure switches
• Pressure indicators
• Pneumatic process instruments

Because the ADT 992 uses ambient air as the pressure medium, no hydraulic oil or other liquid pressure medium is required.

This is particularly advantageous for instruments that must remain free from hydraulic contamination.

Dual-Stage Piston System

One of the key features of the Additel ADT 992 is its dual-stage pre-pressure piston.

Generating pneumatic pressure manually becomes increasingly demanding as pressure increases. Additel designed the dual-stage piston system to achieve higher pressures with less physical effort.

This makes it possible to cover the broad operating range from vacuum to 50 bar while maintaining the portability expected from a handheld calibration pump.

The system is particularly beneficial for technicians who perform multiple pressure calibrations during field service and maintenance work.

Lever-Type Pressurization

The Additel ADT 992 uses a lever-type pressurization mechanism.

Each lever stroke can provide a pressure increase of approximately:

30 psi / 2 bar per stroke.

This allows the operator to efficiently generate the approximate pressure required for the calibration point.

Once the required pressure has been approached, the fine adjustment mechanism is used for precise setting.

The combination of lever pressurization and fine adjustment provides both speed and control during routine calibration work.

Precise Fine Adjustment

After coarse pressure generation, the Additel ADT 992 provides a fine adjustment screw for precise control of the calibration pressure.

The specified adjustment resolution is:

10 Pa / 0.1 mbar.

The maximum volume available for fine adjustment is:

7.2 ml.

This allows the operator to increase or decrease the applied pressure smoothly when approaching the desired calibration point.

Precise adjustment is especially useful when working with:

• High-resolution digital pressure gauges
• Precision reference pressure instruments
• Pressure transmitters
• Pressure switches
• Sensitive pneumatic pressure sensors

The operator can generate the approximate pressure using the lever mechanism and then use the fine adjustment screw for precise positioning.

Maximum Load Volume of 35 ml

The Additel ADT 992 is specified for a maximum load volume of:

35 ml.

The connected volume of the reference instrument, device under test, hose and adapters affects the performance of a pneumatic pressure generation system.

Keeping the connected workload within the manufacturer’s specification supports efficient pressure generation and adjustment.

For field applications, minimizing unnecessary hose and adapter volume can also help improve response and stabilization.

Multi-Position Operation

A particularly practical feature of the Additel ADT 992 is its ability to operate in multiple positions.

The pump can be used in configurations including:

• Horizontal orientation
• Vertical orientation
• Tilted orientation

The adjustable reference port and dual rubber grips support these different working positions.

This flexibility is particularly valuable during on-site calibration, where the technician may not have access to a conventional laboratory bench.

The pump can therefore be positioned according to the available workspace and the location of the device under test.

Portable Design for Field Calibration

The Additel ADT 992 has been designed with portability as a key requirement.

Its dimensions are approximately:

320 × 110 × 122 mm.

The weight is only:

3.5 lb / 1.6 kg.

This compact format makes the ADT 992 significantly easier to transport than many benchtop pneumatic pressure pumps.

No batteries or external electrical power supply are required.

For mobile calibration technicians, maintenance departments and service organizations, this combination of low weight and independent operation provides considerable practical advantages.

Hand-Tight Quick Connectors

The supplied flexible hose incorporates a hand-tight quick connector for the device under test.

This allows compatible instruments to be connected and exchanged conveniently without conventional tools.

The concept is particularly useful when several pressure instruments must be tested consecutively.

Available connection 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 ADT 992 to be configured for commonly used international pressure connection standards.

Integrated Port Filters

Clean air is important for reliable pneumatic pressure calibration.

The Additel ADT 992 therefore incorporates filtration at several points in the pneumatic system.

According to Additel, the pump uses:

• 150 µm filter at the standard port
• 100 µm filter at the pump air intake
• 150 µm filter at the pressure outlet

These filters are designed for quick removal, simplifying inspection and maintenance.

The filtration concept helps protect the internal pneumatic system and connected equipment against contamination.

Professional Comparison Calibration

The Additel ADT 992 is designed to provide pressure for professional comparison calibration.

A typical configuration consists of:

Additel ADT 992 + Reference Pressure Instrument + Device Under Test

The pump generates the pneumatic pressure.

A suitable reference pressure instrument provides the traceable reference value.

The device under test and reference instrument are exposed to the same generated pressure.

After stabilization, the indication of the device under test can be compared with the reference value.

The procedure can then be repeated at several increasing and decreasing pressure points according to the applicable calibration procedure.

Pressure Gauge Calibration

The Additel ADT 992 is particularly suitable for calibrating pneumatic pressure gauges.

Typical devices include:

• Mechanical pressure gauges
• Digital pressure gauges
• Vacuum gauges
• Compound pressure gauges
• Precision pressure indicators

The pump itself is the pressure source and does not replace the reference pressure instrument.

For professional calibration, it should therefore be combined with a suitable reference gauge or pressure calibrator with adequate accuracy and traceability.

The achievable measurement uncertainty depends on the complete measurement setup, reference standard, environmental conditions, pressure stability, calibration procedure and other relevant uncertainty contributions.

Pressure Transmitter Calibration

The Additel ADT 992 can also be used as the pneumatic pressure source for pressure transmitter calibration.

A suitable reference pressure instrument measures the applied pressure while the electrical output of the transmitter is measured using an appropriate process calibrator or precision electrical measuring instrument.

For industrial transmitters with a:

4 to 20 mA

output, increasing and decreasing pressure points can be generated throughout the required range.

This allows the relationship between applied pressure and transmitter output to be evaluated.

Pressure Switch Testing

The precise adjustment capability of the Additel ADT 992 also makes the pump suitable as a pressure source for pressure switch testing.

The applied pressure can be gradually increased until the pressure switch changes state.

Pressure can then be reduced to determine the reset point.

Combined with a suitable reference pressure instrument and electrical switch detector, this allows parameters such as:

• Switching pressure
• Reset pressure
• Switching hysteresis

to be determined.

The fine adjustment screw is especially useful when approaching the switching point.

Durable Construction and Low Maintenance

The Additel ADT 992 is designed for regular professional use.

The ram and adapters are manufactured from:

stainless steel.

The pump body combines:

stainless steel and aluminum.

Seal materials include:

Buna-N, PTFE and copper alloy.

Additel describes the pump as being custom machined for rugged operation while maintaining low leakage and minimal maintenance requirements.

This makes the ADT 992 suitable for both controlled laboratory environments and demanding field applications.

Technical Highlights

Additel ADT 992 vs. Additel ADT 993

The Additel ADT 992 and Additel ADT 993 belong to the same generation of handheld pneumatic pressure pumps.

Both pumps use air as the pressure medium and feature:

• Dual-stage pre-pressure piston technology
• Lever-type pressurization
• Fine pressure adjustment
• Multi-position operation
• Portable construction
• Hand-tight quick connection technology

The primary difference is the maximum positive pressure.

The Additel ADT 992 provides:

95% vacuum to 700 psi / 50 bar.

The Additel ADT 993 extends the positive-pressure capability to:

1,000 psi / 70 bar.

The ADT 992 is therefore suitable when the required pneumatic calibration range does not exceed 50 bar, while the ADT 993 provides additional range for applications extending to 70 bar.

Additel ADT 992 vs. Hydraulic Pressure Pumps

The Additel ADT 992 differs fundamentally from hydraulic Additel pumps such as the ADT 925, ADT 927 and ADT 928A.

The ADT 992 uses:

air.

Hydraulic pumps use liquids such as oil or deionized water.

The pneumatic design eliminates the risk of contaminating the connected device with hydraulic oil and is therefore particularly suitable for pneumatic pressure instruments.

Hydraulic pumps, on the other hand, are generally used when significantly higher pressures are required.

Selecting the appropriate pressure pump therefore depends not only on the maximum pressure but also on the permissible pressure medium of the device under test.

Accessories for the Additel ADT 992

Additel offers several accessories for the ADT 992.

Available accessories include:

• Additel ADT 102 adapter and fitting set
• Additel ADT 103 hand-tight adapter and fitting set
• Additel 9901-992 carrying case
• Additel ADT 992/993 maintenance kit
• Additional ADT 100 female quick connectors

The standard accessories include:

• 20 O-rings
• Flexible pressure hose
• One female quick connector for the device under test

The SET configuration additionally includes the carrying case.

Typical Applications

The Additel ADT 992 is suitable for:

• Pneumatic pressure calibration
• Vacuum calibration
• Pressure gauge calibration
• Digital pressure gauge calibration
• Compound pressure gauge calibration
• Pressure transmitter calibration
• Pressure sensor calibration
• Pressure switch testing
• Comparison pressure calibration
• Field calibration
• Mobile calibration services
• Industrial maintenance
• Calibration laboratories
• Process instrumentation
• Research and development
• Pressure metrology

Why Choose the Additel ADT 992?

The Additel ADT 992 combines a broad pneumatic pressure range, efficient manual pressure generation and excellent portability in a modern handheld calibration pump.

Its range from 95% vacuum to 700 psi / 50 bar allows both vacuum and positive-pressure instruments to be tested using a single pressure source.

The dual-stage pre-pressure piston reduces the effort required to generate higher pneumatic pressures, while lever-type pressurization allows the approximate calibration pressure to be reached efficiently.

A fine adjustment screw with a specified adjustment resolution of 10 Pa / 0.1 mbar enables precise positioning of the final calibration pressure.

Multiple operating positions, an adjustable reference port and dual rubber grips provide additional flexibility during on-site calibration.

With dimensions of approximately 320 × 110 × 122 mm and a weight of only 1.6 kg, the ADT 992 is especially attractive for technicians who require a professional pneumatic pressure source that can easily be transported between calibration locations.

At europascal, we provide Additel pressure generation and calibration technology for professional laboratory, industrial and field applications. Our portfolio includes pneumatic and hydraulic pressure pumps, digital pressure gauges, pressure calibrators, pressure modules and automated pressure calibration solutions.

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 992 is available on the official Additel website.

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