Based on this product's specifications, here are some alternatives and similar models
Wireless soil temperature and relative humidity sensor Garni technology GARNI 071S
Summary description:
Wireless sensor for measuring soil temperature and relative humidity. The Garni technology GARNI 071S provides continuous monitoring of soil conditions to help optimize irrigation, plant care and greenhouse management. Designed for use in gardens, pots, nurseries and agricultural plots, it delivers clear readings for better decision-making and healthier plants.