Frost Probe Datasheet

FEATURES ? PVC pipe closed by a PVC bottom cap ? PVC clear inside tubing closed at both ends ? Removable top cap FROST PROBE 40.0149 ORDERING INFORMATION • Product code: FR-1149050100 • Please specify the length of each probe. GENERAL DESCRIPTION The frost probe is a simple instrument used to measure frost and thaw depth in the soil. It gives data that is comparable to the data collected with other more sophisticated and expensive methods. However, the reading of the Roctest frost probe is easier and less expensive. The frost probe is made of two concentric pipes installed in the ground vertically. The pipe envelope is closed at the bottom end and has a removable top cap. The inside tubing, or frost pipe, is made of clear PVC filled with a water and blue methylene solution. This tubing is closed at both ends. Moreover, a pulling bar is installed at the top to remove the instrument and take readings. TECHNICAL DESCRIPTION When frost penetrates the ground, a separation occurs between the water solution, which becomes colorless when frozen, and blue methylene. Because of its low density, blue methylene tends to remain in the unfrozen section of the tube, where the concentrated solution is. This phenomenon is reversible as well, which means that it is possible to follow the frost and thaw evolution over time. Roctest Ltd. · 665 Pine Avenue, Saint-Lambert, QC, J4P 2P4 CANADA · Tel. 1-450-465-1113 · Fax 1-450-465-1938 · info@roctest.com · www.roctest-group.com Telemac SAS · 10, avenue Eiffel, 77220 Gretz-Armainvilliers, FRANCE · Tel. +33-1-64-06-40-80 · Fax +33-1-64-06-40-26 · info@telemac.fr · www.roctest-group.com Smartec SA · Via Pobiette 11, CH-6928 Manno, SWITZERLAND · Tel. +41 91 610 1800 · Fax +41 91 610 1801 · smartec@smartec.ch · www.roctest-group.com Products and specifications are subject to change without notice. © Roctest Ltd., 2012 E50149-120208