Tensor Ex

Fully electronic rotary drive for explosive areas

Advanced drive technology in a robust housing. ARIS actuators of the series Tensor Ex are designed for industrial use in zone 1 hazardous areas. They are used for the actuation of regulating and shut-off valves, e.g. flaps, valves, ball valves, dosing pumps etc., and offer a high safety level. The large number of mounting holes according to ISO 5211 and a change-over shaft system ensure a simple construction on all standard fittings without costly brackets. The drives of Zone 1 are characterized by a high level of intrinsic safety and operational safety.




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  • Operational safe

    • Permanent monitoring of the drive motion
    • No release or adjustment of switching cams, even with vibrations
    • Permanent plausibility check between motor and sensor movement
    • Electronic position detection via two Hall sensors (directly on the output shaft)
    • Detection of speed and direction of rotation via three Hall sensors (in the motor)
    • Permanent current monitoring
    • Torque cut-off
  • Intelligent and precise

    • Adjustable ramps for engine start and stop
    • Short braking and acceleration times
    • 12 bit without play on the output shaft
    • Position is detected absolutely
    • Low-backlash basic gear
    • No hysteresis
    • Easy readjustment
    • Bus control (optional)
  • Flexibility – very economical

    • Easy adjustment via buttons, i.e. short commissioning times
    • Free choice of the desired travel path by programming
    • Various standard mounting holes, incl. ISO 5211
    • Multi-voltage power supply 85 … 265 V AC (alternatively low-voltage power supply AC / DC)
    • Special characteristics for I-ACT (PMR) controller (optional)
  • Durable technology

    • Absolutely wear-free position detection, i.e. permanently exact switch-off
    • No abrasive contacts
    • Protection class IP 65
    • Brushless current supply (BLDC motor)
    • No start-up capacitors
  • User friendly

    • Electronic adjustment of torque and speed
    • Electronic adjustment of end positions and additional switches
    • Programming board with 3 buttons and LEDs
    • Electronic position indicator (optional)
    • Toolless setting
  • EX specifications

    • Can be used in Zone 1 and Zone 2
    • Device categories 2G and 3G
    • Pressure-proof encapsulation “d”
    • Applicable to gases with increased ignition breakdown capability “C”
    • Highest temperature class T6
    • For gases from ignition temperature> 85 ° C

Housing aluminum/steel

Pressure-proof encapsulation


Tensor drive

Types S/M/L


Customized shaft

Specifications rotary drive Tensor Ex
Tensor Ex (Zone 1)
Protection classIP 65
Ex-Protection classEx II 2G Ex d IIC T6 Gb (Ex-Zone 1)
Ambient temperature–20 °C…+60 °C
HousingPressure-proof encapsulated (Aluminum, steel)
Down shaft1.4021
Power supply85…265 V AC
(optional low voltage power supply AC/DC)
Additional switches2 or 4 Stück bistable relays (optional)
PotentiometerElectronic (optional)
Travel10°…100 turns (S)
10°…30 turns (M)
10°…15 turns (L)
Duty cycle 100%
Connection1x M20x1.5 or 1x M20x1.5 + 1x M16x1.5 (Zone 1)
Travel cutoffElectronic (wear-free)
MaintenanceLifetime lubrication (maintenance-free)
(optional position controller 12 bit, Bus, …)
Flange connectionISO F05 and ARIS 65×50