Testo 0628 7510 stub probe for temperature measurements ntc testo 0628 7510 this testo stub probe is suitable for temperature measurements in air liquids and pastes due to its ntc sensor element the probe gives precise temperature measurements with an accuracy of up to plusmn 0 2 deg c the probe can be used with any testo product with an ntc sensor input socket testo 0628 7510 stub probe for temperature measurements ntc