P-840 · P-841 Preloaded Piezo Actuators
Optional with Integrated Position Sensor
P-840, P-841 piezo translators (DIP switch for size comparison)
P-840, P-841 piezo translators (DIP switch for size comparison)
  • Outstanding Lifetime Due to PICMA® Piezo Ceramic Stacks
  • Travel Range to 90 µm
  • Compact Case
  • Pushing Forces to 1000 N
  • Pulling Forces to 50 N
  • Sub-Millisecond Response, Sub-Nanometer Resolution
  • Versions: with Ball Tip, Vacuum Versions
P-840, P-841 dimensions in mm. Length L: See table
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Application Examples
  • Static and dynamic Precision positioning
  • Disc-drive-testing
  • Adaptronics
  • Smart structures
  • Active vibration control
  • Switches
  • Laser tuning
  • Patch-Clamp
  • Nanotechnology

The P-840 and P-841 series translators are high-resolution linear actuators for static and dynamic applications. They provide sub-millisecond response and sub-nanometer resolution.

These translators are equipped with highly reliable multilayer piezo ceramic stacks protected by a non-magnetic stainless steel case with internal spring preload. The preload makes them ideal for dynamic applications and for tensile loads as well.

Ceramic Insulated Piezo Actuators Provide Long Lifetime
The highest possible reliability is assured by employing the award-winning PICMA® multilayer piezo actuators. PICMA® actuators are the only actuators on the market with a ceramic-only insulation, which makes them resistant to ambient humidity and leakage-current failures. They are thus far superior to conventional actuators in reliability and lifetime.

Optimum UHV Compatibility - Minimum Outgassing
The lack of polymer insulation and the high Curie temperature make for optimal ultra-high-vacuum compatibility (no outgassing / high bakeout temperatures, up to 150 °C).

Mounting is at the foot, with push/pull forces of less than 5 N, the actuator can be held by clamping the case. The versions with ball tip decouple torque and off-center forces from the piezoceramic. To provide magnetic coupling, the P-176.20 magnetic adapter can be screwed into the top piece (only for versions without ball tip).

Read details in Mounting and Handling Guidelines (see link).

High Accuracy in Closed-Loop Operation
The standard model P-840 is designed for open-loop positioning. Version P-841 with integrated high-resolution strain gauge position sensors provides high precision for closed-loop operation (further details see link).

Piezo Drivers, Controllers & Amplifiers
High-resolution amplifiers and servo-control electronics, both digital and analog, are described in the “Piezo Drivers / Servo Controllers” (see link) section.

Application Articles, Background Information, External Links

Papers & Articles
Related Information:
P-810 · P-830 Piezo Actuators
For Light and Medium Loads
P-882, P-883, P-885, P-887, P-888 PICMA® Stack Multilayer Piezo Actuators
Ceramic-Insulated High-Power Actuators
P-842 – P-845 Preloaded Piezo Actuators
For High Loads and Force Generation, Optional with Integrated Position Sensors
E-610 Piezo Amplifier / Controller
1-Channel OEM Piezo Driver Module with Optional Position Servo-Control
E-831 OEM Piezo Driver
Low-Cost Module with Separate Power Supply
E-621 Piezo Servo-Controller & Driver
Modules with Fast 24-Bit Interface
E-625 Piezo Servo-Controller & Driver
Compact Bench-Top Device with High-Speed Interface

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