Guide

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2015 Flexpoint Sensor Systems Page 5 of 10

The Bend Sensor

Device

Base Materials –

 Can be printed on several substrates – is primarily printed on a plastic film such as polyimide.

Contact the factory for the specifications on the materials used.

 The Bend Sensor

can be printed on both sides allowing the sensor to give readings in both

directions and can delineate the direction of the bend as well as magnitude.

 The base material determines such factors as environmental stability, changes in resistance,

durability, and costs. Polyimide films are required for wide temperature operating ranges and

extreme durability – but may vary in cost depending on the geometry of the sensor.

Specifications:

Polyimide –

Storage Temperatures: -60ºC to +110ºC @ 90% RH typ.

Operating Temperatures: -40ºC to +90ºC @ 90% RH typ.

Polyester –

Storage Temperatures: -40ºC to +100ºC @ 90% RH typ.

Operating Temperatures: -30ºC to +90ºC @ 90% RH typ.

Environmental Stability –

 The base material is an important factor in determining the ultimate environmental stability

of the sensor. Thermal coefficients of expansion of the base material and the product the

sensor is being placed in should be considered.

 Single layer construction and pliability of the base material helps keep the sensor stable in

many environmental conditions; even surprisingly extreme conditions.

 Unlike competing sensors, the sensor is nicely able to withstand exposure to humidity,

moisture and many other fluids.

 The sensor can be environmentally protected in many ways including the following:

o Laminate a protective layer over the sensor coating – multiple laminate types are

possible

o Coat the sensor with rubber, silicone, or urethane.

o Seal the sensor in a plastic sleeve.