Possible applciations include servo loop motion control systems requiring small displacement monitoring, such as infrastructure integrity monitoring. And also digital farming (dendrometers), in-line process measurement, robotic grippers in industrial automation systems, and medical robotic grasping forceps.
Measuring 35mm by 14.5mm by 28mm, the 40 LHE delivers linearity down to ± 1 % (full stroke) with a resolution of 12 µm.
Previous-generation devices offered electrical strokes up to 10mm, this one extends to 40mm.
Note that the 40 LHE includes “2 faces” for fixing holes, for horizontal or vertical mounting.
Vishay writes:
“As a “true power on” device, the 40 LHE reports its position immediately upon power-up without requiring recalibration, re-homing, or initialization routines — even after a power loss. This further reduces costs by eliminating the need for a battery back-up.”
“Available with a spring return option and customizable on request to meet the most demanding needs, the RoHS-compliant device operates with a supply voltage of 5 VDC ± 10 % and supply current of < 16 mA typical. The recommended load resistance is 1 kΩ for both analog and PWM output.”
Specifications
The specifications of the Vishay Sfernice 40 LHE are blow, and the datasheet is online (PDF).
- Electrical stroke Up to 40 mm
- Independent linearity Analog output: ± 1 % (at Vmax. = 0.5 m/s) / ± 2 % (at Vmax. = 1 m/s)
- PWM output: ± 1 % (at Vmax. = 0.4 m/s) / ± 2 % (at Vmax. = 0.8 m/s)
- Resolution (40 mm stroke) 12 μm
- Supply voltage 5 VDC ± 10 %
- Supply current < 16 mA typical
- Output signal Analog ratiometric (10 % to 90 % of Vsupply) or PWM (1 kHz – 10 % to 90 % of duty cycle)
- Over voltage protection (input) +20 VDC
- Reverse voltage protection (input) -10 VDC
- Over voltage protection (output) +10 VDC (+14 VDC peak – 200 s at 25 °C)
- Recommended load resistance Min. 1 kΩ for analog output and PWM output
- Hysteresis Static: 0.1 % of Vsupply
- Start up cycle < 15 ms
The company reports a lifespan greater than 10 million cycles.
Samples and production quantities of the 40 LHE are available now, with lead times of 12 weeks.
See also: Snap-in power aluminium capacitors have ratings of 550V, 600V
