Additel ADT 916A is a precise pneumatic pressure test pump designed for professional pressure calibration from 95% vacuum to 600 psi / 40 bar. The manually operated pump combines a wide pneumatic pressure range with fine adjustment down to 10 Pa / 0.1 mbar, excellent pressure stability and convenient hand-tight connections. This makes the Additel ADT 916A an ideal pressure source for calibrating pressure gauges, transmitters, sensors, switches and other pneumatic pressure measuring instruments.

The Additel ADT 916A uses air as the pressure medium and requires neither electrical power nor an external compressed-air supply. Pressure is generated manually, while a high-quality screw press allows precise adjustment of individual calibration points.

A specially designed shut-off valve helps maintain stable pressure during calibration. An integrated gas-liquid isolator protects the internal pump mechanism against moisture and contamination from connected instruments, reducing maintenance requirements.

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 approximately 2.7 kg, the ADT 916A combines robust construction with good portability for laboratory, workshop and field applications.

At europascal, the Additel ADT 916A 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 916A combines a broad pneumatic pressure range with precise manual pressure adjustment and excellent stability.

Key advantages include:

• Pneumatic pressure generation from 95% vacuum to 600 psi / 40 bar
• Vacuum and positive pressure generation with one pump
• 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
• 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
• Simultaneous connection of reference and test instrument
• No PTFE tape or conventional wrenches required for compatible connections
• Different NPT, BSP and M20 × 1.5 connection options
• Stainless steel and aluminum construction
• Portable design
• Weight approximately 2.7 kg
• Minimal maintenance
• Optional carrying case and accessories
• Ideal for comparison pressure calibration

Pneumatic Pressure Generation up to 40 bar

The Additel ADT 916A covers a broad pneumatic pressure range from:

95% vacuum

to:

600 psi / 40 bar positive pressure.

This wide range allows a single manual pressure pump to be used for vacuum, low-pressure and medium-pressure calibration applications.

The ADT 916A is therefore particularly useful for calibration laboratories, maintenance departments and field technicians who need to calibrate different types of pneumatic 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 broad pressure range reduces the need for several separate manual pressure sources.

Vacuum Generation up to 95%

The Additel ADT 916A can generate not only positive pressure but also up to:

95% vacuum.

This capability is particularly useful when calibrating vacuum and compound pressure instruments.

Typical applications include:

• Vacuum gauges
• Compound pressure gauges
• Vacuum transmitters
• Pressure sensors
• Vacuum switches

A single pump can therefore cover measurement points below atmospheric pressure as well as positive pressure calibration points up to 40 bar.

This provides considerable flexibility in professional calibration environments.

Fine Adjustment Down to 10 Pa

Professional calibration requires accurate control of the generated pressure.

The Additel ADT 916A incorporates a high-quality screw press for fine pressure adjustment.

Additel specifies an adjustment resolution of:

10 Pa

or:

0.1 mbar.

After the approximate calibration pressure has been generated, the screw press can be used to approach the required pressure point precisely.

This allows the operator to generate calibration points in a controlled manner without continuously operating the main pressure generation mechanism.

The fine adjustment is especially useful when working with high-resolution digital pressure references.

Excellent Pressure Stability

Once a calibration point has been reached, the pressure must remain sufficiently stable to compare the device under test with the reference instrument.

The Additel ADT 916A therefore incorporates a specially designed shut-off valve.

This valve helps isolate the calibration volume and makes the 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

After reaching the required calibration point, sufficient stabilization time should always be allowed before recording the measurement values.

Air as Pressure Medium

The Additel ADT 916A uses:

air

as its pressure medium.

No hydraulic oil is required during normal pneumatic operation.

This makes the pump particularly suitable for pressure instruments that should not be contaminated with hydraulic fluids.

Air operation also simplifies everyday handling and maintenance compared with hydraulic pressure generation systems.

For specifically oil-free applications, Additel recommends contacting the manufacturer to clarify the appropriate configuration and operating requirements.

Integrated Gas-Liquid Isolator

Pressure instruments used in industrial applications can contain small amounts of moisture, dirt or other contaminants.

The Additel ADT 916A therefore includes a built-in:

gas-liquid isolator.

This component helps prevent moisture and contamination from entering the internal pump mechanism.

Protecting the internal pneumatic components helps reduce maintenance requirements and supports reliable long-term operation.

Any collected moisture or contamination should be removed according to the manufacturer’s operating instructions.

Hand-Tight Quick Connectors

The Additel ADT 916A is equipped with two hand-tight connectors.

One connection is used for the:

reference pressure gauge

while the second connection is intended for the:

device under test.

Compatible pressure instruments can be connected and disconnected without PTFE tape or conventional wrenches.

This is particularly useful in calibration laboratories where multiple pressure instruments are tested consecutively.

The connection system can significantly reduce setup time and simplify everyday calibration work.

Different Pressure Connections

The Additel ADT 916A is available with different pressure connection 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 adapted to common international pressure connection standards.

Suitable adapter sets can be used when the reference instrument or device under test has a different pressure connection.

Professional Comparison Calibration

The Additel ADT 916A is specifically designed as a comparison pressure test pump.

A typical calibration setup consists of:

Additel ADT 916A + Reference Pressure Instrument + Device Under Test

The reference instrument and device under test are connected to the two pressure ports.

The ADT 916A then generates the required pressure.

The operator approaches the desired calibration point using the pressure generation mechanism and the fine adjustment screw.

After sufficient stabilization, the indication of the device under test is compared with the traceable reference pressure.

This process can be repeated at several increasing and decreasing pressure points according to the selected calibration procedure.

Pressure Gauge Calibration

The Additel ADT 916A is particularly suitable as a manual pressure source for calibrating pneumatic pressure gauges up to 40 bar.

Typical applications include:

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

The pump generates the required pressure but does not itself measure the traceable reference pressure.

It is therefore combined with an appropriate reference pressure gauge or calibrator.

The measurement uncertainty of the complete calibration system depends on the selected reference standard, environmental conditions, pressure stability, calibration procedure and other uncertainty contributions.

Pressure Transmitter Calibration

The Additel ADT 916A can also provide the pneumatic pressure source for pressure transmitter calibration.

The pump generates the required input pressure while a suitable reference instrument measures the actual pressure.

The transmitter output can simultaneously be measured with a process calibrator or precision multimeter.

For many industrial pressure transmitters, this output is:

4 to 20 mA.

Several increasing and decreasing pressure points can be generated to determine the relationship between pressure input and electrical output.

Pressure Switch Testing

The Additel ADT 916A can also be used as the 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 pressure reference and electrical switch detector, this enables determination of:

• Switching pressure
• Reset pressure
• Switching hysteresis

The fine pressure adjustment helps accurately approach the switching point.

Robust Construction

The Additel ADT 916A is designed for professional calibration applications.

According to Additel, the ram and adapters are manufactured from:

stainless steel.

The pump body combines:

stainless steel and aluminum.

The sealing materials include Buna-N, PTFE and copper alloy components.

This robust construction supports reliable operation in both laboratory and field environments.

Compact and Portable

Despite its pressure range up to 40 bar, the Additel ADT 916A remains portable.

The pump weighs approximately:

5.9 lb / 2.7 kg.

Its dimensions are approximately:

140 mm height

with a base of:

315 × 198 mm.

The relatively large base provides a stable working platform while the overall dimensions remain compact enough for transport and mobile calibration.

No External Power Required

The Additel ADT 916A is completely manually operated.

It requires:

no electrical power

and:

no external compressed-air supply.

This makes it particularly suitable for field calibration.

A technician can perform pressure calibration using the ADT 916A, an appropriate reference pressure instrument and the necessary adapters without relying on an external pressure generation system.

Minimal Maintenance

The Additel ADT 916A is designed for minimal maintenance.

The use of air eliminates hydraulic fluid during normal operation, while the built-in gas-liquid isolator protects the internal mechanism against moisture and dirt.

Additel also offers a dedicated:

ADT 916A-MK maintenance kit.

Correct operation, clean pressure connections and appropriate storage in a dry, non-corrosive environment help maintain reliable performance.

Accessories for the Additel ADT 916A

Several accessories are available for the ADT 916A.

These include:

• Additel ADT 102 adapter and fitting set
• Additel ADT 103 hand-tight adapter set
• Additel ADT 100-HTK-8K hose test kit
• Additel 9904-916 carrying case
• Additel ADT 916A-MK maintenance kit

The carrying case is designed to accommodate one ADT 916A pump and two suitable pressure instruments.

The appropriate accessory configuration depends on the pressure connections and instruments used in the calibration system.

Technical Highlights

Additel ADT 916A vs. Additel ADT 914A

The Additel ADT 916A and Additel ADT 914A are both manual pneumatic pressure pumps designed for professional comparison calibration.

The major difference is the maximum positive pressure range.

The Additel ADT 914A covers:

95% vacuum to 375 psi / 25 bar.

The Additel ADT 916A extends this range to:

95% vacuum to 600 psi / 40 bar.

Both pumps provide fine adjustment down to:

10 Pa / 0.1 mbar.

The ADT 914A is particularly compact and lightweight, while the ADT 916A provides the additional positive pressure capability required for pneumatic instruments with measurement ranges above 25 bar.

The appropriate model therefore depends primarily on the required pressure range and application.

Typical Applications

The Additel ADT 916A 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 pressure calibration
• Laboratory calibration
• Field calibration
• Industrial maintenance
• Service applications
• Pneumatic test systems
• Research and development

Why Choose the Additel ADT 916A?

The Additel ADT 916A combines a broad pneumatic pressure range with precise adjustment and professional pressure stability.

Its operating range from 95% vacuum to 600 psi / 40 bar enables one manual pressure source to cover vacuum, low-pressure and medium-pressure calibration applications.

The 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.

A built-in gas-liquid isolator protects the internal pump mechanism from moisture and contamination, reducing maintenance requirements.

Two hand-tight quick connectors simplify the connection of a reference instrument and device under test without PTFE tape or conventional wrenches.

Different NPT, BSP and M20 × 1.5 configurations provide compatibility with common international pressure connections.

Because the ADT 916A is 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 916A is available on the official Additel website.

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