Absolute rotary position sensors for heavy-duty position feedback tasks

13-05-2021 | Variohm | Test & Measurement

R2 series absolute angle sensors from Phoenix America offer accurate and environmentally robust 12-bit resolution position measurement with standard or user-specified output curves from 60-degree to 360-degree total range. Provided in an option of analogue or PWM output versions, this sensor’s fully non-contacting Hall effect design - incorporating a compact reinforced nylon sensor housing and a separate magnetic position marker - provides excellent durability and a nearly limitless working life with operational temperatures from -40C to +125C. Particularly cost-competitive for larger volume OEM applications and ideal for demanding heavy engineering, agricultural and construction equipment installations, the series is available with full support from Variohm EuroSensor.


The sensor housing is simply mounted by two slotted holes on a 38mm PCD – providing rotary adjustment for exact magnet alignment. A typical installation would comprise a shaft-mounted target magnet axially aligned with an approximately 1.27mm air gap. Customer-specific configuration can be arranged on request.


The sensor is powered from a 5VDC supply voltage, and interfacing flexibility is ensured with ratiometric output and a push-pull output stage that enables the use of pull-up or pull-down resistors. Standard or inverted output curves are available from +/-30 degrees to +/-180 degrees in 60-degree increments with angle-proportional output across 0.5VDC to 4.5VDC and with the 0-degree mid-range point at 2.5VDC.


Custom and multi-slope output curves can be factory programmed to satisfy the customer’s application. Absolute output indicates no need for zero positioning or datum routines once the sensor is installed. The robust and durable build quality of the device is completed with various cable lengths to 2m and optional industry-standard Deutsch or Metri-Pack connectors. Electrical protection incorporates reverse polarity, transient suppression and output short circuit.

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