Quick Answer: The Soil Thermometer measures temperature below the ground surface at root-zone depths, using a red spirit filling. It typically covers -10°C to +110°C and has a protective sheath so it can be pushed into soil.
Last updated: October 2026
Key Features
Designed for readings at root-zone depth
Red spirit filling, mercury-free
Polymer or metal sheath protects the stem during insertion
Etched permanent graduations
Ring or handle for straight insertion and removal
Technical Specifications
Specification
Value
Instrument type
Liquid-in-glass or bimetallic dial
Construction
Borosilicate glass or stainless steel casing
Sensing medium
Red spirit
Temperature range
Typically -10°C to +110°C (model dependent)
Housing
Polymer or metal sheath
Scale
Permanently etched graduations
About This Product
Agriculture and environmental science students push the thermometer into a seed bed or field plot to see how soil temperature changes with depth and through the day. Comparing readings in different soils, such as clay and sand, shows how heat moves through the ground and how it affects germination.
Frequently Asked Questions
What temperature range does the Soil Thermometer cover?
Typically -10°C to +110°C, depending on the model.