Dear K'Nachamas,
As we discussed on the phone, the model you request is EX-202 (controller) which it MUST be used with sensor head (EX-110, 9,250 Baht ) for a completed set as if this is a project not for repeat/maintenance. However, please noted that EX model is a displacement sensor and CANNOT be check defect on part. Furthermore, if you would like to check detect on part I would suggest you another model such as vision system (CV). Thank you for your interest.