Home > Products > Growers > Equipment & Supplies > Greenhouse Heaters > PHT RDT 4 THERMOSTATE FOR UP TO 4 MATS PHT RDT 4 THERMOSTATE FOR UP TO 4 MATS Log in to see availability and pricing. Item Number: PHT8527 Case Qty: 1 Min Qty: 1 UPC: Manufacturer: Phytotronics Inc. Product Description Product Availability Phytotronics® RDT-4 ThermostatThe RDT-4 Thermostat features a digital temperature display and 4 outlets for plugging in Redi-Heat™ Heavy-Duty Propagation Mats or Redi-Heat™ Heavy Duty Heating Cables. The sensor probe is inserted into the cell of the plug tray to give an accurate temperature setting. Log in for warehouse specific availability.