Thermometer Genia Digiflash 221695 Sealing ring fits around the

Sealing ring fits around the inside rim of the cover

Bottom and sides are of non-permeable material to prevent leakage or leaching of disinfection solution

They have a flat top so you can stand the waterer upside down on the ground while you refill it

or for spraying two rows of crop at once

Thermometer Genia Digiflash 221695 Sealing ring fits around theFlexible fine tip for comfort and safety Long 7 cm probe for easier measurement Accurate to 0. 1 C This deluxe thermometer should meet all of your needs. The longer 7cm probe has a fine flexible tip for increased patient comfort and safety. Accurate to 0. 1C. The thermometer will give a read out in as little as 10 seconds, and automatically shut off after 4 minutes. It is waterproof and has a replaceable battery (LR41).