Ogden Manufacturing Co. has introduced two new temperature controllers-the ETR-8300 and ETR-4300. These models join the 1/16 DIN 9300 and 1/32 DIN 3400 as members of Ogden's Super Controller Series. Both the ETR-8300 and ETR-4300 controller models feature digital MODBUS communications, multiple error protection modes, remote setpoint input, event input capabilities, dual input delta-T (differential) control, and heater alarm/current monitoring. The 1⁄4 DIN ETR-4300 and 1/8 DIN ETR-8300 revolve around an 18 bit A/D converter for high-resolution measurement. Inputs feature a completely field-programmable selection of nine thermocouple sensors, two standard RTD curves, and six linear process inputs. Ogden Manufacturing Co.