The 350B Temperature Controller offers a combination of features, performance, and value that is unmatched by other TEC controllers. Three operating modes are user selectable: constant R (thermistor), constant T (thermistor), or constant ITE (current to TE cooler), while delivering output power of 55 W (±5 A, 11 VDC). Quiet, safe output current results from P-I-D control loop with complete flexibility for adjustment through the Newport LDD/TEC Application software (included) or user developed programs. The PID control algorithm achieves optimal stability and settling performance along with an ITE current limit setting protects TE coolers from damage, regardless of operating mode.