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Monitor the hive’s internal temperature at a glance. No batteries, easy to install on the crown board, ideal for brood control.
It does not measure the temperature of the brood: it measures what reaches the top. And that, read properly, says a good deal.
Liquid-crystal hive thermometer, circular, about 100 mm, with a scale from 12 to 40 °C. It sits on the crown board, under the roof. No batteries.
01 · WHAT IT IS MEASURING
The disc rests on the top board, so it reads the temperature that reaches the top, not the 35 °C the colony holds at the heart of the brood.
That does not make it useless: what you are reading is how much heating the colony is producing, which is what you want to know without opening.
02 · HOW TO READ IT
In spring, a sustained rise says the colony is warming brood. In summer, high values confirm it is fanning. In autumn, a drop compared with its neighbours points to a weak or queenless colony. In winter, a live colony keeps residual heat.
The trick is comparison: a single reading says little; the same reading next to the hive alongside, on the same day, says a lot.
03 · WHAT IT IS LIKE
It is a liquid crystal: the figure lights up in colour and is read with the roof lifted. There are no batteries and nothing to maintain, and its round format suits most crown boards.
04 · BEFORE YOU BUY
It is an activity indicator, not a logger:
| ✓ FITS | Crown boards with room to rest it · a quick reading on opening. |
| ✕ DOESN'T FIT | Anyone wanting continuous data or alarms: that is a scale or a connected probe. |
| ⚠ WORTH KNOWING | It is read on the spot: it keeps no history. |
| Type | Liquid-crystal thermometer |
|---|---|
| Range | 12 to 40 °C |
| Format | Circular, about Ø 100 mm |
| Placing | On the crown board, under the roof |
| Power | None: no batteries |
| Maker | Lyson |
| Reference | 3001K |
Data sheet

Monitor the hive’s internal temperature at a glance. No batteries, easy to install on the crown board, ideal for brood control.
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