How to select a Draw Wire Position Sensor

Before selecting a draw wire position sensor, a number of factors should be considered:

Measuring range & compactness
Typical measuring ranges for draw wire sensors are from 50mm up to 50,000mm (50 metres), but this varies depending on the sensor supplier. Size, compactness and weight could all be important factors to consider, particularly if the sensors need to be mounted in difficult-to-access positions. The size of the sensor housing relative to the measuring range may also be a critical factor, especially if the size of the housing needs to be relatively small for a large measuring range. For example, the most compact model in the BRSEN draw wire sensor range is just 30mm in size but offers a measuring range of 750mm. Some suppliers can provide miniature sensors with swivel flanges for easy mounting and installation.

OEM custom capabilities
The capability of a supplier to provide customised sensor designs to suit high volume OEM applications may also be critical to your project. In this case, look for a supplier that can offer many modified sensor variants, as well as the ability to develop completely new sensor specifications if required. Some suppliers offer different housing materials such as aluminium or low cost plastic versions for high volume applications. It’s also worth checking how quickly the supplier can offer OEM modified sensor designs and how much stock they hold at a local level that can be easily modified. The ability of a supplier to combine different sensor elements and measuring ranges with different enclosure options will mean that an ideal draw-wire sensor can be provided for virtually any OEM application.

Output options
What electrical output options are required for the sensors? In principle, all commercially available and suitably sized rotary position sensors can be used as sensor elements in a dra