The Shrinkage Drain is made of a 1m long u-shaped stainless steel profile which contains the specimen. To avoid wall friction the drain is covered with a removable Neopren ® sheet. On one side a removable anchor is fixed. On the other side this anchor is movable and sliding on three wheels. The motion of this anchor is registered by a high sensitive digital probe . 
As displacement sensor we are using a digital probe which is connected to the Probe Interface Electronics which converts the analogue signals from the probe head into a digital format.
Up to 10 probes may be connected over a digital bus system. The distance between the probes and the Datalogger may be several hundreds of meters. A data-logger supplied with the system the data of several shrinkage drains are registered and stored in the logger as standard ASCII text files. Optional a synchronous registration of temperature and humidity is possible. Several temperature channels and a mixed temperature /humidity channel are available.You may also connect a balance (option).
The logger has a network interface (Ethernet) So you can easily integrate it into local Intranet. With a standard web-browser software you can readout the data, and visualize it. For further data handling we recommend Microsoft Excel ® ore any similar visualization program.
No special PC software is necessary. You need only your browser-software like Firefox ore Internet-Explorer.
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| Specimen Length | 1000 mm (standard), 500 mm or 250 mm (option) |
| Specimen Diameter | 60 * 40 mm (mortar) or 100 * 60 mm (concrete) |
| Measurement Range | 5 mm |
| Resolution: | 0,3 µm |
| Typical Accuracy : | Better then ±2 µm |
| Temperature Control (option) | Double wall floor and walls with aluminum core and copper tubes can be connected to a chiller for temperature control |
| Temperature Measurement (option) | Thermocouple type K for embedding into the specimen |
| Temperature- and Moisture Measurment (option) | Temperature and humidity sensor for measuring the environmental conditions. Stainless steel housing. |
Also available :
double wall drain for cooling and heating (see picture below)
different lengths like 250mm and 500mm
different cross sections like 60 * 100 mm (for concrete)
Se below the double wall version:
| Drain for Mortar 60 x 40 x 1000 mm with LVDT displacement sensor | S0103 |
| Drain for Mortar 60 x 40 x 1000 mm w/o LVDT | S0102 |
| Drain for Mortar60 x 40 x 250 mm with LVDT | S01044 |
| Drain for Mortar 60 x 40 x 500 mm with LVDT | S0104 |
| Cellular Rubber for the Mortar Drain | S0008 |
| Drain for Concrete 100 x 60 x 1000 mm with LVDT | S0033 |
| Drain for Concrete 100 x 60 x 1000 mm w/o LVDT | S0034 |
| Drain for Concrete 100 x 60 x 500 mm with LVDT | S0036 |
| Cellular Rubber Sheet for Concrete | S0014 |
| Anchor for the Mortar and Concrete Drains | S0020 |
| Double Wall Temperature Control Option | S0035 |
| Data Logger for up to 10 Drains | S0001 |
| Data Logger Input Thermocouple Type K, incl. Sensor | S0027 |
| Data Logger Input Temperature/Humidity Sensor, incl. combinded Sensor |
S0016 |
