Additel ADT 993 is a powerful handheld pneumatic pressure test pump designed for professional pressure calibration from 95% vacuum to 1,000 psi / 70 bar. Combining a dual-stage pre-pressure piston, efficient lever-type pressurization and precise fine adjustment, the pump provides an exceptionally broad pneumatic pressure range in a compact and portable design.

With a weight of only 3.5 lb / 1.6 kg, the Additel ADT 993 is particularly suitable for field calibration, maintenance, commissioning and mobile calibration services. Unlike hydraulic pressure pumps, it uses clean air as the pressure medium, eliminating the need for oil or another liquid pressure medium.

The dual-stage piston system enables higher pneumatic pressures to be generated with reduced operating effort. Lever-type pressurization allows the operator to rapidly approach the desired pressure, while the integrated fine adjustment screw provides precise control of the final calibration point. With an adjustment resolution of 10 Pa / 0.1 mbar, the ADT 993 combines efficient pressure generation with excellent fine control.

Another major advantage is its multi-position design. The longitudinal layout, adjustable reference connection and ergonomic construction allow the pump to be operated in different positions. This makes the Additel ADT 993 particularly useful for on-site calibration where conventional benchtop equipment may be impractical.

At europascal, the Additel ADT 993 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 993 combines an exceptionally broad pneumatic pressure range with precise adjustment, low operating effort and excellent portability.

Key advantages include:

• Pneumatic pressure generation from 95% vacuum to 1,000 psi / 70 bar
• Air as the pressure medium
• Dual-stage pre-pressure piston
• Higher pressure generation with reduced operating effort
• Lever-type pressurization
• Fast pressure generation and stabilization
• Approximately 30 psi / 2 bar pressure increase per lever stroke
• Fine adjustment screw
• Adjustment resolution of 10 Pa / 0.1 mbar
• Maximum load volume of 35 ml
• Maximum fine adjustment volume of 7.2 ml
• Multi-position operation
• Longitudinal ergonomic design
• Adjustable reference connection
• Flexible pressure hose
• Hand-tight quick connector for the device under test
• Integrated port filters
• Multiple NPT, BSP and M20 × 1.5 connection options
• Compact dimensions
• Weight of only approximately 1.6 kg
• Completely manual operation
• No electrical power required
• Low maintenance requirements
• Suitable for laboratory and field calibration

Pneumatic Pressure Generation up to 70 bar

The Additel ADT 993 provides a generated pressure range from:

95% vacuum

to:

1,000 psi / 70 bar.

This broad range enables vacuum, compound and positive pneumatic pressure instruments to be tested using a single portable pressure source.

Typical devices under test include:

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

The 70 bar maximum pressure extends the operating range beyond many conventional handheld pneumatic pumps while retaining a compact and lightweight design.

Dual-Stage Piston System

A central feature of the Additel ADT 993 is its dual-stage pre-pressure piston.

Generating high pneumatic pressure manually can require considerable physical effort. Additel addresses this challenge with a dual-stage design that allows higher pressures to be generated efficiently.

The system provides the broad pressure range required for calibration from vacuum up to 70 bar while maintaining the portability of a handheld pump.

This makes the ADT 993 particularly useful for calibration technicians who need to perform several pressure calibrations at different locations during the working day.

Efficient Lever-Type Pressurization

The Additel ADT 993 uses a lever-type pressure generation system.

Each lever stroke provides a pressure increase of approximately:

30 psi / 2 bar per stroke.

This allows the operator to rapidly approach the required positive pressure.

The lever mechanism is used for coarse pressure generation, while the integrated fine adjustment screw is used to precisely set the final calibration pressure.

This combination provides both speed and control during professional pressure calibration.

Precise Fine Adjustment

Once the approximate pressure has been generated, the fine adjustment screw of the Additel ADT 993 enables precise control.

The specified adjustment resolution is:

10 Pa / 0.1 mbar.

The maximum available fine adjustment volume is:

7.2 ml.

This allows the operator to smoothly increase or decrease pressure when approaching an individual calibration point.

Precise adjustment is particularly valuable when working with:

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

After reaching the desired pressure, sufficient stabilization time should be allowed before recording measurement values.

Maximum Load Volume of 35 ml

The Additel ADT 993 is designed for a maximum connected load volume of:

35 ml.

The total connected pneumatic volume includes the internal volume of the device under test, reference instrument, hose and adapters.

Keeping the total load volume within the specified range supports efficient pressure generation and adjustment.

For mobile calibration applications, minimizing unnecessary hose length and adapter volume can further improve pressure response and stabilization.

Air as the Pressure Medium

The Additel ADT 993 uses:

air

as its pressure medium.

No hydraulic oil or other liquid pressure medium is required.

This provides an important advantage when calibrating pneumatic pressure instruments because there is no risk of introducing hydraulic oil into the device under test.

The pneumatic operating principle makes the ADT 993 particularly suitable for:

• Pneumatic pressure gauges
• Process transmitters
• Pressure switches
• Air pressure sensors
• Vacuum instruments
• Compound pressure instruments

The connected device should always be compatible with the specified pressure range and pneumatic pressure medium.

Multi-Position Operation

The Additel ADT 993 has been designed for flexible use in different working environments.

According to Additel, the pump supports four different operating positions.

These include configurations such as:

• Horizontal orientation
• Vertical orientation
• Tilted head orientation

The longitudinal layout enhances control during operation and allows the pump to be positioned according to the available workspace.

This is particularly useful during field calibration where the technician may be working directly at an industrial installation rather than at a conventional laboratory bench.

Portable Design for Field Calibration

Portability is one of the major advantages of the Additel ADT 993.

The dimensions are approximately:

320 × 110 × 122 mm.

The weight is only:

3.5 lb / 1.6 kg.

Despite this compact design, the pump can generate pneumatic pressure up to 70 bar.

No electrical power supply or batteries are required.

This makes the ADT 993 particularly suitable for:

• Mobile calibration technicians
• Field service
• Industrial maintenance
• Commissioning
• Calibration laboratories
• On-site troubleshooting

The combination of low weight and broad pressure range reduces the amount of equipment that must be transported to the calibration location.

Hand-Tight Quick Connection

The Additel ADT 993 is supplied with a flexible pressure hose and an ADT100-X-FNG female quick connector for the device under test.

The hand-tight connection concept allows compatible pressure instruments to be installed and exchanged conveniently.

This can reduce setup time when multiple devices must be calibrated consecutively.

The flexible hose supplied with the pump is specified for a maximum pressure of 630 bar, providing ample pressure capability for the ADT 993 operating range.

Multiple Pressure Connection Options

The Additel ADT 993 is available with several 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 provides compatibility with commonly used international pressure connection standards.

Additional adapter and hand-tight fitting sets are available for instruments with other pressure connections.

Integrated Port Filtration

Clean air helps protect the internal pneumatic system and connected pressure instruments.

The Additel ADT 993 therefore incorporates several filters.

These include:

• 150 µm quick-removal filter at the standard port
• 100 µm quick-removal filter at the pump air intake
• 150 µm quick-release filter at the pressure outlet

The removable design simplifies inspection and maintenance.

This filtration concept helps reduce contamination entering the pneumatic system during routine calibration work.

Professional Comparison Calibration

The Additel ADT 993 provides the pressure source for professional comparison calibration.

A typical configuration consists of:

Additel ADT 993 + Reference Pressure Instrument + Device Under Test

The ADT 993 generates the required pneumatic pressure.

A suitable reference pressure instrument provides the traceable pressure value.

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

After sufficient stabilization, the indication of the device under test is 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 993 is particularly suitable for pneumatic pressure gauge calibration.

Typical devices include:

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

The pump itself generates the pressure but does not replace the reference standard.

For professional calibration, the ADT 993 should therefore be combined with a suitable reference pressure gauge or pressure calibrator with appropriate accuracy and metrological traceability.

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

Pressure Transmitter Calibration

The Additel ADT 993 can also be used as a pressure source for pneumatic pressure transmitter calibration.

A suitable reference instrument measures the applied pneumatic pressure.

At the same time, the electrical output of the transmitter can be measured using an appropriate process calibrator or precision electrical measuring instrument.

For industrial pressure transmitters with a standard:

4 to 20 mA

output, several increasing and decreasing pressure points can be generated.

This allows the relationship between applied pressure and electrical output to be evaluated across the required measurement range.

Pressure Switch Testing

The Additel ADT 993 is also suitable as a pressure source for pressure switch testing.

Pressure can be gradually increased until the pressure switch changes electrical state.

The pressure is then reduced to determine the reset point.

Combined with an appropriate reference pressure instrument and electrical switch detector, this allows determination of:

• Switching pressure
• Reset pressure
• Switching hysteresis

The fine adjustment screw is especially useful when approaching switching points accurately.

Robust Construction

Despite its low weight, the Additel ADT 993 is designed for professional use.

The ram and adapters are manufactured from:

stainless steel.

The body combines:

stainless steel and aluminum.

Seal materials include:

Buna-N, PTFE and copper alloy.

This construction combines mechanical durability with the low weight required for a portable field calibration pump.

Technical Highlights

Additel ADT 993 vs. Additel ADT 992

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

Both models provide:

• 95% vacuum capability
• Air as the pressure medium
• Dual-stage piston technology
• Lever-type pressurization
• 10 Pa / 0.1 mbar adjustment resolution
• 35 ml maximum load volume
• 7.2 ml fine adjustment volume
• Multi-position operation
• Approximately 1.6 kg weight

The primary difference is the maximum positive pressure.

The Additel ADT 992 generates pressure up to:

700 psi / 50 bar.

The Additel ADT 993 extends the range to:

1,000 psi / 70 bar.

The ADT 993 therefore provides an additional 20 bar of positive pressure capability while retaining essentially the same compact handheld format.

For applications up to 50 bar, the ADT 992 provides the required range.

For applications requiring pressures between 50 and 70 bar, the Additel ADT 993 provides the additional pneumatic pressure capability.

Additel ADT 993 vs. Additel ADT 917

The Additel ADT 993 and Additel ADT 917 both provide pneumatic pressure generation up to approximately:

1,000 psi / 70 bar.

However, the two pumps use different design concepts.

The ADT 993 is optimized as a lightweight handheld pump with lever-type pressurization and multi-position operation.

The ADT 917 uses a larger pressure pump design with a different pressure generation mechanism.

At only approximately 1.6 kg, the ADT 993 is particularly suitable for field calibration and mobile service applications where portability is a priority.

The appropriate model therefore depends not only on maximum pressure but also on workload volume, operating environment and preferred pressure generation method.

Accessories for the Additel ADT 993

Additel offers several accessories for the ADT 993.

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
• Additel ADT100-X-FNG female quick connectors

The standard package includes:

• 20 O-rings
• Flexible pressure hose
• One ADT100-X-FNG female quick connector for the device under test

The SET configuration additionally includes the carrying case.

Typical Applications

The Additel ADT 993 is suitable for:

• Pneumatic pressure calibration
• Vacuum calibration
• Pressure calibration up to 70 bar
• 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
• Commissioning
• Calibration laboratories
• Process instrumentation
• Research and development
• Pressure metrology

Why Choose the Additel ADT 993?

The Additel ADT 993 combines an exceptionally broad pneumatic pressure range with efficient manual pressure generation and excellent portability.

Its range from 95% vacuum to 1,000 psi / 70 bar enables vacuum, compound and positive-pressure instruments to be calibrated using a single portable pressure source.

The dual-stage pre-pressure piston reduces the effort required to generate higher pressures, while the lever-type mechanism provides approximately 2 bar of pressure increase per stroke.

For precise calibration point adjustment, the fine adjustment screw provides a specified resolution of 10 Pa / 0.1 mbar.

Four operating positions and the longitudinal design provide additional flexibility during on-site calibration.

Despite its 70 bar maximum pressure, the pump measures only approximately 320 × 110 × 122 mm and weighs just 1.6 kg, making it particularly attractive for technicians who require a high-performance pneumatic pressure source for mobile calibration work.

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 993 is available on the official Additel website.

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