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Carlson Joint and Foundation Meter
Carlson Joint and Foundation Meter
Carlson Joint and Foundation Meter at an angle Close-up of a Carlson Joint and Foundation Meter

CARLSON JOINT + FOUNDATION METERS

CATEGORY > Carlson Instruments

CARLSON JOINT + FOUNDATION METERS

DESCRIPTION

Carlson Joint Meters and Foundation Meters are similar to strain meters except that they have greater range. This is accomplished by having a coil spring in series with each of two loops of elastic wire. The foundation meter is the same as the joint meter except that it has its range mainly in contraction. The joint meter is used mainly to measure the opening to joints and therefore it has most of its range in expansion. Range is allowed by spring loading the elastic wire. Both measure temperature as well as expansion or contraction in the same way that strain meters do.

The dimensions of the joint and foundation meters are roughly similar to those of the strain meter. A bellows near the center of the length permits movement to be transmitted to the interior elastic wires. The bellows has a bursting pressure of 400 psi (2.7 MPa), but should normally not be exposed to more than 100 psi (690 kPa) hydraulic pressure. Padded heat shrink tubing is placed over the bellows to prevent bonding or jamming by concrete or mud.

The installation of joint meters is facilitated by embedding a steel socket on one side of the joint, and not inserting the joint meter until just before placing the concrete on the second side. However, there are many applications of the joint meters, so they can be ordered with or without sockets.

QUICK SPECS

Wider range than strain meters.


Coil spring in series with each of two loops of elastic wire.

APPLICATIONS

Where strain meters are used.

BENEFITS

Increase Productivity


High Accuracy


High Reliability

DESCRIPTION

Carlson Joint Meters and Foundation Meters are similar to strain meters except that they have greater range. This is accomplished by having a coil spring in series with each of two loops of elastic wire. The foundation meter is the same as the joint meter except that it has its range mainly in contraction. The joint meter is used mainly to measure the opening to joints and therefore it has most of its range in expansion. Range is allowed by spring loading the elastic wire. Both measure temperature as well as expansion or contraction in the same way that strain meters do.

The dimensions of the joint and foundation meters are roughly similar to those of the strain meter. A bellows near the center of the length permits movement to be transmitted to the interior elastic wires. The bellows has a bursting pressure of 400 psi (2.7 MPa), but should normally not be exposed to more than 100 psi (690 kPa) hydraulic pressure. Padded heat shrink tubing is placed over the bellows to prevent bonding or jamming by concrete or mud.

The installation of joint meters is facilitated by embedding a steel socket on one side of the joint, and not inserting the joint meter until just before placing the concrete on the second side. However, there are many applications of the joint meters, so they can be ordered with or without sockets.

QUICK SPECS

Wider range than strain meters.


Coil spring in series with each of two loops of elastic wire.

APPLICATIONS

Where strain gauges are used.

BENEFITS

Increase Productivity


High Accuracy


High Reliability

CONTACT US

RST Instruments Ltd.

11545 Kingston Street
Maple Ridge, BC
Canada V2X 0Z5

604-540-1100

1-800-665-5599

Fax: 604-540-1005

info@rstinstruments.com

CONNECT WITH RST

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ASK A QUESTION

CONTACT US

RST Instruments Ltd.

11545 Kingston Street
Maple Ridge, BC
Canada V2X 0Z5

604-540-1100

1-800-665-5599

Fax: 604-540-1005

info@rstinstruments.com



CONNECT WITH RST

Linkedin icon
Youtube icon

ASK A QUESTION

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