Rotary encoders and panel encoders for medical applications

Compact, long lived, precise and reliable!

MEGATRON develops tailor-made rotary encoders and angle sensors in addition to offering custom medical engineering solutions. The reliable functionality of MEGATRON rotary encoders makes them equally suitable for diagnostics and medical treatment applications. What often makes this field highly challenging is the need for numerous functions to be provided in a very limited space.

With these space constraints, only extremely compact components can be used. We would be happy to provide advice about choosing suitable products. You can rely on the outstanding functionality of our rotary encoders and angle sensors. Excellent components for your complex applications translate into reliable, precise results over the long term.

Examples of typical applications:

  • Precise feedback on the elevation of operating tables
  • Regulation of the dosage in anaesthetic machines
  • Encoders for manually configuring heart-lung machines

MOM18: Optical rotary encoder provides reliable and precise feedback on the elevation of operating tables

Operating tables are adjusted as and when this is needed. This means that the design of the application must enable rapid, simple and smooth height adjustment. In the operating room, even a few millimetres can be a decisive factor in the success of a surgical procedure. The compact optoelectronic rotary encoder, which is part of the MEGATRON MOM18 series, meets this requirement by using an optical angle sensor to monitor the elevation of the operating table. The greater level of dielectric strength that is needed for product approval is built into the device during production. We have also designed a custom, convenient plug connector for the cost-effective assembly of the optical rotary encoder. The complete product thus ensures reliable feedback of the operating table’s height.

Our contribution to the application

  • Convenient and cost-effective plug connector reduces the total assembly cost
  • Increased dielectric strength – just to be on the safe side

MRB: Haptically optimised rotary encoder regulates the dosage administered by anaesthetic machines

The dosage to be administered by anaesthetic machines is generally configured manually. These control units therefore need to be highly precise and must support reliable operation. As an additional precaution, the setting can only be changed when the knob is being pushed down. Moreover, to satisfy fire protection concerns, the bearing of the rotary encoder was lubricated with a special incombustible, inert industrial grease. The incremental rotary encoders of the MEGATRON MRB series are ideally suited to this application. They can only be turned when the knob is being pushed down. The required grease was introduced into the bearing, and an additional washer prevents cleaning agents from penetrating into the rotary encoder’s interior. Even the assembly of the control knob received special attention: It was necessary to adjust the length of the rotary encoder’s axis by flattening the tip in order to allow the control knob to be fitted to the inside of the control panel both precisely and conveniently. The product-specific modifications ensure that the anaesthetic machine is controlled accurately and with fail-safe reliability.

Our contribution to the application

  • Meets safety requirements and thus delivers reliable operation and fire protection
  • Custom axis length and flattened tip for best-fit, cost-efficient assembly

SPM: Highly sensitive and redundant rotary encoders for manually configuring heart-lung machines

Setting the pump speed of a heart-lung machine is a highly delicate process that must be made as simple, precise and reliable as possible. The rotary and incremental encoders of MEGATRON’s SPM series fully meet the customers’ requirements: When turning the rotary knob, the operator experiences a defined rotational resistance, which facilitates the simple, comfortable and precise setting of the desired value. For safety reasons, the rotary encoder must also feature a fail-safe design. This is achieved by means of a redundant mechanism. This particular customer-specific solution based on the SPM product series incorporates a twin design with deviating pulse values, which makes the device fail-safe. This ensures that the pumping rate of the heart-lung machine is maintained with extreme precision after having been set manually.

Our contribution to the application

  • Special rotational resistance to facilitate highly sensitive, precise and accurate manual setting
  • Special redundant design featuring different pulse values – just to be on the safe side
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