Quick Answer: The IMD Thermometer is a Six’s pattern maximum and minimum thermometer that records the highest and lowest temperatures reached between readings. Its U-shaped twin-column capillary covers -40°C to +50°C, with magnetic markers showing each extreme.
Last updated: October 2026
Key Features
Six’s pattern maximum and minimum thermometer
Dual-column U-shaped capillary tube
Magnetic metal indices mark the high and low points
Push-button or magnetic reset for a new reading period
Spirit-filled sensing liquid
Polymer frame with a protective roof and holes for wall mounting
Technical Specifications
Specification
Value
Instrument type
Six’s pattern maximum and minimum thermometer
Sensing
Dual-column U-shaped capillary
Temperature range
-40°C to +50°C
Indicators
Magnetic metal indices
Reset
Manual push-button or magnetic
Frame
Weather-resistant polymer with protective roof
Sensing medium
Spirit-filled, mercury-free
Mounting
Pre-drilled holes for vertical wall installation
About This Product
Hung outdoors or in a greenhouse, the thermometer lets students record the day’s maximum and minimum and work out the daily temperature range for a weather log. It also captures overnight or weekend extremes around experiments that need a stable temperature, and the markers are reset after each reading.
Frequently Asked Questions
How is the IMD Thermometer reset after a reading?
The magnetic markers are returned to the liquid columns using the manual push-button or magnetic reset, ready for the next period.