Lutron TM-946 digital thermometer has 4 display, 4 thermometer channels, type K -100 to 1300 oC, type J -100 to 1200 oC, Pt 100 ohm -199 to 850 oC, oC/ oF, data hold, record, data logger, optional data transmission software, RS-232 interface, DC 1.5V battery x 6 or DC 9V adapter in.