Oxygen and temperature measuring compost lance (single unit) battery operated

The measuring device is a 1.2 m or 1.5 m long lance driven into the compost and contains one oxygen sensor and two temperature sensors. The tip of the lance, driven into the compost, has a rounded head, so that the compost components encountered "on the way" do not stick into it. The oxygen sensor, to which air is sucked from the tip of the lance using a pump, is located in the upper part of the lance. Temperature sensors are placed at the end and in the middle of the lance. The lance is cordless, battery-powered. It uses the LoRa network for communication.