Standard Crack Monitor

The standard crack monitor can be used to track horizontal or vertical movement across a crack on a flat surface. The standard monitor is a precision device that consists of two plates, which overlap for a part of their length. The bottom plate is transparent and marked with a hairline cursor in the form of a cross. Can be fixed to the surface with screws or adhesive (not included). Supplied with instructions and record sheet.

Manual: H-2936A_crackmonitor.pdf

Crack Monitor Plus

The crack monitor plus can be used to track horizontal or vertical movement across a crack on a flat surface. The plus offers to upgrades to the standard design. Rather than presetting the two measuring plates together at zero with tape, the plus uses four small pegs, which ensure alignment during installation and then removed during monitoring. The plus also provides measuring flats, which allow accurate readings to be taken with calipers during monitoring. Can be fixed to the surface with screws or adhesive (not included). Supplied with instructions and record sheet.

Manual: HC-2937_crackmonitor.pdf

Corner Crack Monitor

The corner crack monitor uses a hinged mounting bracket to allow tracking of cracks in corners with angles between 70° and 180°. They monitor both internal and external corners. Corner monitors use the design of the plus using four small pegs, which ensure alignment during installation and are then removed during monitoring. The corner monitor also provides measuring flats, which allow accurate readings to be taken with calipers during monitoring. Can be fixed to the surface with screws or adhesive (not included). Sold in pairs (2). Supplied with instructions and record sheet.

Manual: HC-2938_crackmonitor.pdf

Displacement Crack Monitor

The displacement crack monitor tracks horizontal and displacement movement where there is a step across a crack due to displacement of "out-of-plane" movement. The monitor consists of a base plate (not calibrated), a top plate (calibrated) and a graduated ruler. The ruler is removed from the gauge when not taking a measurement, but used to measure the relative movement in the plates. Can be fixed to the surface with screws or adhesive (not included). Supplied with instructions and record sheet.

Manual: HC-2939_crackmonitor.pdf

Crack Width Gauge

The crack width gauge is designed specifically to measure widths and locations of cracks prior to beginning a monitoring program. The crack width gauge is suitable for internal and external use. It is made of polycarbonate, which has a co-efficient of linear thermal expansion of 7.0 x 10^-5cm/cm/°C for ambient temperatures between -30°C and 30°C. The scale is calibrated from the end of the gauge to facilitate measuring cracks in corners. Supplied in protective case. Conforms to BS EN ISO 9001:2000.

Crack Monitoring Kit

A kit designed to provide all the products needed ot set up a crack monitoring program. Supplied with a courier bag with should strap, the kit includes: (1) crack width gauge; (5) crack gauge plus (1) pair of corner crack gauges; (7) packs of fixing screws; (1) Plastic Padding (chemical metal); instruction booklet and record sheets.

Crack Monitor Adhesive

Very-fast-hardening 2-component Epoxy Adhesive for use in affixing crack monitors to concrete surfaces. Comes in a one ounce dual-tube syringe for easy application.

Caliper Marks

Caliper marks can be affixed with plastic padding to either side of a crack to be monitored and then used to measure crack movements with a caliper. Pkg. of 100.

Manual: HC-2943_calipermarks.pdf

Screws and Plugs

Package of (4) four zinc-plated screws and four plastic plugs, suitable for affixing a crack gauge to a flat surface.

Multi-Length Strain Gauge Set

Mechanical gauge is recommended as a substitute for the Whittemore strain gauge for many applications. Designed to measure strain in masonry-type materials, structural components under load, opening or closing of structural cracks, measuring relative structural displacements, rock mechanics testing and drying shrinkage of concrete block testing. Instrument frame is cast aluminum alloy with 5 master settings of 2, 4, 6, 8 and 10 inches, easily set for gauging. Dial indicator has .0001" minimum graduation; effective strain range is 0.3". Maximum linear measurement is 0.4". Set includes: strain gauge, dial indicator, 8 brass inserts, 2 contact seats, 2 mounted contact points, invar master bar, punch bar and one compartmented wood storage case. Metric model has 5, 10, 15, 20 and 25cm settings and dial indicator with 002mm graduations. Meets ASTM C426.