This tool from Draper is designed for quick & simple checking of the PH & moisture level of soil & can also be used to measure light at any given location.
It's simple to use - just probe & read (no batteries required).
Suitable for many applications & will allow you to give your plants the optimum growing environment.
Dimensions: 12" (30cm) high x 2" 5cm) wide x 1½" (4cm) deep.
Two Wests & Elliott (UK) - manufactures and suppliers of
greenhouses, greenhouse staging, fruit cages (netting and aluminium
tubing), a wide variety of gardening equipment and
accessories.