Name: TS21 - Avongard Standard Tell-Tale
SKU: TS21
Availability: InStock

TS21 – Avongard Standard Tell-Tale

29.50AU$ exc. GST

The Avongard Standard Tell-Tale is a precision gauge to monitor displacement over the time. Typically used for crack monitoring on concrete structures, private or heritage properties.

Downloads:

57 in stock (can be backordered)

Description

TS21

Avongard Standard Tell-Tale

Experience precision in crack/displacement monitoring with the Avongard Standard Tell-Tale Crack Monitor TS21. Designed to detect and record displacement accurately, this instrument is an essential tool for professionals who demand reliable data.

Originating from the United Kingdom, Avongard has built a reputation for quality and durability in the field of displacement monitoring.

The TS21 model is user-friendly and robust, providing clear indications of crack development. Whether for maintenance or research, the Avongard Crack Recording Gauge delivers consistent, reliable performance.

Its straightforward design ensures ease of use, making it a valuable asset for your monitoring tasks.

Features:

Tell-Tales are manufactured in the UK, in compliance with ISO 9001, from tough, vandal-resistant polycarbonate.
The Avongard Standard Tell-Tale consist of two plates that overlap for part of their length. The bottom plate is calibrated in millimetres, and the top plate is transparent, with a hairline cursor in the form of a cross.
Avongard Standard Tell-Tales can monitor 2D (horizontal or vertical) movement across a crack (or joint) on a flat surface.
Range: ± 20 mm horizontal and ± 10 mm vertical.
Accuracy: ±1.0 mm on scale.
Temperature: -40 to +80 degrees C.
The coefficient of thermal expansion is 6.8 x 10-5 cm/cm per degree C

Application:

Monitoring of crack displacement on concrete or walled structures.

Each Standard Tell-Tale is supplied with:

1x AF11 – set of Fixing Screws (4 screws + 4 plugs)
Installation instructions.
Crack Monitoring Record Sheet. Additional sheets are available for free. Download here.

1. Initial Measurement

Use the AW11 Crack Width Gauge to measure and record crack width before monitoring. The AW11 is sold separately.

2. Fixing the Tell-Tale

Clean the surface and fix the Tell-Tale across the crack using the supplied screws and plugs and/or AE14 Araldite adhesive (not included but available as accessories).

3. Commissioning the Tell-Tale

After fixing the unit on both sides with the screws and/or adhesive, remove the two pegs to allow free movement between the plates.

4. Monitoring Crack Movement in 2D

As the crack opens or closes, the cursor moves relative to the calibrated scale. The opening or closing of the crack is then recorded on the crack record sheet supplied. It is also recommended to record the ambient temperature as seasonal changes may affect the evaluated structure.

For a better understanding of cracking causes and structural behaviour, we recommend the book “Guide to Subsidence”, also available in our store.