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Grain-Watch® Temperature Spears

The Grain-Watch temperature spears are fitted with our high quality digital sensors and innovative 1-wire system and are designed for grain temperature monitoring in flat bottom bins.

Grain temperature monitoring and managing can be carried out with the Grain-Watch PC system or our hand-held temperature monitoring unit. Our temperature monitoring spears and cables are compatible and can be integrated into one system.

The Grain-Watch temperature monitoring spears are available in steel, fiberglass and composites.

GWTL-R Temperature spear


GWTL-R is a new generation temperature spear. It is flexible, yet strong. It can penetrate commodities at depths that previously were impossible.

The spear comes in lengths up to 12 meters. After use, it can easily be rolled up and stowed away until the next season.

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Length 2 m 4 m 6 m 8 m 10 m 12 m
Number of sensors 1 2 3 4 5 6
Temperature spear composite


Length 250 cm 400 cm 550 cm
Number of sensors 2 3 4
Temperature spear fiberglass


The steel spear is 300 cm long and has 2 temperature sensors.

Temperature spear steel

Temperaturespears in flat bottom storage facility

Temperature spear