A request has been received from an external customer forrecommendations for linear position control sensors to be used inan explosive environment. For this reason unsafe electricalcontacts must be avoided. The sensors will be installed inlocations that are hazardous to access except when the plant isshut down annually for maintenance. The span required is 5cm. Thesensor case must not permit any ingress of dust or of water.
State what type of position sensors you would recommend and giveyour reasons. Sketch both the recommended sensor and circuit, andexplain its operation. Comment on how signal conditioningrequirements can now be met. Identify the durability required inrespect of dust and water ingress.
