The Wireless Crack Movement Recorder provides continuous recording of both movement in crack width and ambient temperature. The unit is configurable to measure at a pre-defined interval of 1 minute to 91 hours. The built in data logger stores readings for later download wirelessly onto a PC from a range of up to 150m.

The unit is powered by a user-replaceable battery, which should last between six months and five years, depending on how the unit is configured and frequency of downloads. The measurements are stored in internal memory and are downloaded to a Windows PC using a USB Communications Module (one is required and available separately). One Communications Module can be used to connect to up to sixteen Crack Movement Recorders.

Monitoring in two dimensions using two units (normally horizontal and vertical) is explained in the manual.

The unit is supplied with fixings and a link to download the latest version of the user guide and software.


Specifications
Movement Sensor
Range:                          80mm (extension cables are available)
Resolution:                    0.003mm
Linearity:                        0.07% full scale

Temperature Sensor
Range:                          -20C - +80C
Resolution:                    1C

Data Logger     
Capacity:                     31926 Readings (15963 readings with redundancy)

Wireless
Frequency:                868MHz
Range:                   150m in free space

Electrical
Power Supply      3.6v 1/2AA Battery

Mechanical
Working Temperature:    -35C - +85C (or according to installed battery)
Cable Tension:               10N
Protection Rating:           IP65
Mass:                              200g

System Requirements
The software requires Windows XP or later.