Automated Pressure Controllers: Additel 773, 783, 793

Portable and benchtop automated pressure controllers for setting and holding pressure during calibration and test — primarily Additel, with ISO/IEC 17025 accredited calibration available on most models.

What a pressure controller does

A pressure controller automatically regulates pressure to a setpoint so you can calibrate gauges, transmitters, and switches without manually pumping and venting to each point. That improves speed and repeatability versus hand generation alone. The Additel 773 and 783 are precision pressure controllers with control stability below 0.003% FS; the hydraulic 793 holds below 0.005% FS.

Where controllers fit

Shop / lab benches — high volume of UUTs, tight setpoints, documenting workflows.
Portable automated calibrators — field or satellite shops that still want automated control.
Complement to pumps and gauges — controllers often sit between a supply (N2, shop air, or hydraulic) and the device under test.

Selection tips

Range and control stability — match the UUT span with margin.
Pneumatic vs hydraulic media and contamination control.
Accuracy and modules — external pressure modules when you need extra ranges.
Throughput features — leak test, switch test, and documenting options on many Additel platforms.

Controllers on this site

Add range with the Additel 151 digital pressure module for ADT7xx controllers, and see pressure calibrators for Additel 761 / 762 automated calibrators.

Additel 773, 783 and 793 compared

All three are Additel benchtop controllers with a 7 in touchscreen, built around removable ADT151 pressure modules. Figures below are from Additel's specifications.

Additel 773, for low pressure: a controller and generator with a built-in pump, so it needs no external air source. It takes two removable ADT151 modules, controls to 0.003% FS stability, and comes as LLP and D models with an optional barometer.
Additel 783, pneumatic to 6,000 psi: a modular controller with two removable ADT151 modules, an optional barometer, ultra-high control speed and 0.003% FS stability.
Additel 793, hydraulic to 15,000 psi: a controller and generator with a built-in pump, so it needs no external pressure source. It takes an interchangeable ADT151 module, comes in oil and water versions, and holds 0.005% FS stability.

Each ships with an ISO 17025 certificate. The controllers are sold as base units, and ADT151 modules are ordered separately for the ranges you need.

Portable automated alternatives

If the work moves between sites, consider these portable automated calibrators:

The Additel 761 has a built-in pump (the current 761A generates to 1,500 psi), dual modules, HART and 24 V loop power.
The Additel 762 generates and controls hydraulic pressure to 15,000 psi at 0.01% FS, with 0.005% FS control stability.

Frequently asked questions

Which Additel pressure controllers need no external pressure source?

The Additel 773 (low pressure) and 793 (hydraulic to 15,000 psi) both have a built-in pump. The 773 needs no external air source, and the 793 needs no external pressure source.

What is the difference between the Additel 773, 783 and 793?

The 773 is a low-pressure controller and generator with a built-in pump. The 783 is a pneumatic modular controller with ranges to 6,000 psi. The 793 is a hydraulic controller and generator to 15,000 psi, in oil or water versions.

Are pressure modules included with the controller?

No. The 773, 783 and 793 are sold as base units, and ADT151 pressure modules are ordered separately. The 773 and 783 each take two removable modules, and the 793 takes one interchangeable module.

What control stability do Additel controllers achieve?

Additel specifies 0.003% FS control stability for the 773 and 783, and 0.005% FS for the 793.

Calibration

Controllers and associated modules can usually ship with ISO/IEC 17025 accredited calibration. Ask at quote if you need module-level certificates or custom points.