dMPBX

A no-grout multiple point borehole extensometer, based on a single rod design.

No grouting required, dual spring mechanism for a positive and permanent anchoring in the borehole.

High sensor accuracy (0.3%FS)

Built-in temperature sensor for accurate compensation

Seismology concept. Tectinic plates activity shown in a polygonal relief texture over black background.

dMPBX

A no-grout multiple point borehole extensometer, based on a single rod design.

No grouting required, dual spring mechanism for a positive and permanent anchoring in the borehole.

High sensor accuracy (0.3%FS)

Built-in temperature sensor for accurate compensation

dMPBX

A no-grout multiple point borehole extensometer, based on a single rod design.

No grouting required, dual spring mechanism for a positive and permanent anchoring in the borehole.

High sensor accuracy (0.3%FS)

Built-in temperature sensor for accurate compensation

Durable Design - can survive blasts and vibration
Up to 6 spring loaded anchors
Does not require grouting
150mm (6 inch) stroke length

Multiple Point Borehole Extensometer

YieldPoint recognizes that in many mining situation fast deployment of an ungrouted borehole extensometer is advantageous. The dMPBX is a unique 1 to 6-Point Multiple Point Borehole eXtensometer (MPBX) based on a single rod design. The anchors are fitted with stainless steel extension springs that secure the instrument in a 38-50mm borehole. The d-MPBX incorporates digital signal processing to result in dramatically improved accuracy compared to similar existing technology.

The Multiple Point Borehole eXtensometer (MPBX) incorporates digital signal processing to result in dramatically improved accuracy. The signal eliminates the necessity for analog-to-digital conversion, resulting in a readout unit that reads data directly in mm and °C. The signals themselves are robust and can be transmitted over 500m of lead-wire. The sensor output is an ASCII (9600,8,N,1) digital signal which can be read by a d-Reader, dataloggers (BluLink and BluLogger), and wirelessly networked BluGateway for transmission to cloud based servers.

Specifications
Key Features	Fully integrated and preassembled borehole extensometer
Diameter	25mm diameter can be placed in 33-50mm hole.
Anchoring	Up to 6 Anchor points over lengths up to 30m
Disp. Range	125, 150 (standard), 200 and 250mm.
Disp. Accuracy:	typically 0.5% F.S(<10m) and 1% linearity (>10m).
Temp. range:	-40 to 125 °C
Output Signal:	RS485 with transmission up to 500m over 2 x tp.
Connectivity:	Ethernet, WiFi networks and LTE networks, Loadsensing, Ackcio, Wisen, Senceive, CSI.