The strain Gauge load cell measures compressive and tensile in rock bolts, cable anchors and tendons . The load cell consist of a stainless steel cylindrical housing with up to 16 resistance strain gauges in a wheatstone bridge configuration.
The vibrating wire concrete stress cell measures radial and tangential stresses in shotcrete, concrete and rock, usually in tunnel lining. The cell consists of a rectangular flat jack formed from two plates of steel welded together around the periphery.
The vibrating wire load cell is designed to directly measure load in pile, rock bolts and between tunnel supports, ad well as tension in cable anchors. The load cell comprise a set of up ti six vibrating wire gauges mounted parallel to the cell axis and spaced at equal to the cell axis and spaced at equal distances radially in a cylindrical housing.
The vibrating wire pressure cell is used to measure total pressure, particularly in earth or rockfill structure. The VW pressure cell has two designs; the double face design providing two active face and the single face design providing one active face.
The Push-In vibrating wire Pressure cell measures total earth pressure in all soil type. The cell is spade-shaped and pointed at one end. A piezometer within the unit allows the measurement of pore water pressure and therefore the derivation of effective pressure.