Each telltale unit can host 2 or 4 measurement anchors
Borehole diameter: 35–45 mm
Displacement measurement range: 0 to 150 mm (without reset)
Accuracy: <1.0 mm, repeatability < 0.1 mm
The system controller supports up to 150 telltales per controller
Full system refresh rate (for 150 telltales) is 15 minutes