Testo 0628 0020 pipe wrap temperature probe with velcro strip testo 0628 0020 p this temperature probe from testo can be used to carry out surface temperature measurements on pipes with a diameter of up to 120mm the tc sensor for measuring temperature is attached to a 20mm wide 395mm long strip and the velcro fastener enables the surface probe to be attached to the pipe quickly and easily p p for optimum heat transfer between the surface probe and the measurement object the use of sil