Pro-Grow GC-4 Gro-Control has heavy-duty steel enclosed capillary tube design manufactured to withstand the greenhouse environment. Capillary length is 30 in. with sensing bulb allowing for remote sensing. Thermostat control range 40-100 degrees F, with dial adjustment and pilot light. Designed to control soil temperature to within 1 degree F of thermostat setting to ensure optimum seed germination and uniform plant growth.
6' cord with grounding plug