Link4 offers versatile stainless steel temperature probes specially designed to work with your iGrow controller(s).

  Use these: to measure air temperatures in other zones, collect data on an array of locations inside your greenhouse(s), control bench heating systems, measure soil temperatures, control hot or cold mixvalve pipes, as a backup sensor, or other applications.

 These rugged sensors are small and can be placed almost anywhere you need them in your greenhouse.