CONTOURED BOILER TUBE CALIBRATION BLOCK

Contoured Boiler Tube Calibration Block (BTB) - boiler tube block with 3 x 1.5mm dia SDH and contoured for 1.9" OD (1.5" NPS) (various contours available, including 2" / 2.5" / 3" / 3.5" / 4" NPS - for calibrating low profile PA probes for use with Bracelet scanner).