Actuators and Sensing

RUAG Space offers a portfolio of Rotary Actuators covering high output torque, high resolution, low mass, high unpowered detend torque and high external load capability together with long life performance.


The portfolio of Rotary Actuators covers high output torque, high Resolution, low mass, high unpowered detend torque and high external load capability together with long life performance. RUAG Space Rotary Actuators are used for:

  • Antenna Deployment
  • Antenna Pointing
  • Solar Array Deployment
  • Electric Propulsion Pointing

Satellite Antenna Rotary Actuator SARA21

The SARA21 Satellite Antenna Rotary Actuator is designed to drive any type of space borne mechanism, while also transmitting a highly accurate position signal to the onboard electronics. It is used to activate a mechanism operating in one or several rotational axes. Typical uses include antenna pointing, solar array deployment and other customized applications. The SARA21 has significant flight heritage.

Small Actuator SA15

The SA15 Small Actuator is designed for pointing applications where high unpowered detent torque and low actuator mass are required. Typical applications are Electric Propulsion Pointing Mechanisms. The SA15 is qualified to a high quasi-static load capability of 70g and due to its modular concept it can be equipped with specific sensors and is highly configurable to customer demands.

Geared Actuator GA15

The GA15 Geared Actuator is a low mass actuator with high output torque and high unpowered detent torque, maintaining its pointing direction in un-powered condition even under high back driving torques. Typical applications are Electric Propulsion Pointing Mechanisms. The GA15 is equipped with redundant potentiometers in coarse / fine arrangement as angular sensors, and with Hall effect reference sensors in coarse fine arrangement to attain high reference accuracy.

Hollow Shaft Actuator HS3

The HS3 Hollow Shaft actuator has a through hole size of 72 mm. This actuator is developed for antenna pointing mechanisms. A micro-vibration reduced version of this actuator is available. Due to its modular concept it is highly configurable to customer demands.

Actuator CSA10

The CSA10 actuator is designed for assembly into thruster pointing mechanisms. It has been developed with a focus on robustness, including generous margins of safety and on achieving a small output step size.


To satisfy a wide range of customer needs in terms of electrical interface and mechanical characteristics and to allow high performance and low mass mechanism assemblies by optimized motorisation solutions RUAG Space offers a portfolio of geared high detent torque stepper motors. These motors have clean detent torque, meaning stable high detent torque positions at any full step position and at any half step position, and offer high load capability. Major motor parameters as output torque, step size, phase resistance, number of phases, or the unpowered detent torque are selectable to customer needs. To provide an optimized drive solution the NEMO motors are combined with planetary gears PG and harmonic drive gears HD of a wide range of available gear ratios.


RUAG's sealed space graded MSwitch SG utilizing a center-pinned toggle which offers normally closed (NC) feedback while combining high accuracy and high repeatability.

RUAG Hollow-Shaft Potentiometer

RUAG’s Hollow-Shaft Potentiometer features a compact and cost efficient solution for space mechanisms.

RUAG MRS Magneto Resistive Sensor

RUAG’s Magneto-Resistive Angular Sensor for Space Applications (MRS) utilizes a ITAR free contactless angular sensing based on the magneto resistive effect. Its compact and robust design features high accuracy, a large airgap, no wear and is radiation hard. Offering two configurations the TTL interface includes the Front End electronics and the pre-amplified analogue signal with 1 Vpp (no FEE required).

KET Pilot Lines: Actuator for Lithography

The Project funded by the European Unions and Saxony's Key Enabling Technology Fond. It focuses on the establishment of a pilot line for the production of actuators used in the semiconductor industry until the proof of readiness for serial production and the associated expectation of stable sales.