Product Introduction

The JW LF-5 crack monitoring instrument is used for long-term monitoring and recording of crack changes at high altitudes and difficult to contact structural locations. The instrument can autonomously and continuously measure and record the process of crack changes over a period of time, as well as changes in external environmental temperature, thus clearly reflecting the trend of crack changes.

The built-in battery of the instrument can record crack change data for more than 6 months. The USB interface can download and store crack width and temperature values to a handheld PDA or computer terminal, and the accompanying software can draw the crack development trend curve.

Performance characteristics

1. It integrates crack sensors, temperature sensors, measuring instruments, and storage devices, and comes with a built-in battery that can continuously monitor for more than 6 months;

2. Outdoor environment design, good sealing, instrument casing, no need for manual intervention once set up and started;

3. Displacement sensors can be installed on hard to reach areas or cracks at heights. The measurement/recording part is connected to a location close to the ground or easily accessible through cables, which facilitates manual operations such as parameter setting, real-time data viewing, data downloading, and battery replacement in the future;

4. The built-in storage in the measurement/recording section can record the width change data of the crack for a long time;

5. The standard USB interface facilitates the direct download of recorded data to handheld PDAs or computer terminals, with simple data setup, collection, and analysis software.

Technical Parameter

1. Measurement range: ± 5mm/10mm/20mm/30mm, customizable;

2. Crack displacement accuracy: ± 0.01mm;

3. Temperature measurement accuracy: ± 0.5 ℃;

4. The maximum number of records is 65536;

5. Minimum sampling interval: 1 minute;

6. Maximum sampling interval: 24 hours;

7. Standby time: greater than 3 months (sampling set to 24 hours);

8. Sealing standard: IP 65；

9. Cable length: 10 meters/15 meters/30 meters, customizable;

10. Power supply: 6 1.5V batteries;

11. Operating temperature:- 30℃～＋80℃；

After analyzing the downloaded data using the processing software provided with the instrument, the computer automatically draws the curve of crack width and temperature changes during this period.