... precision temperature control of ±2 deg C. External temperature sensor enables temperature monitoring and accurate analysis of ... ZonesVoltageAC220V±10%, 50/60HzPositioningV-groove with external universal fixtureTemperature controlK Sensor Closed loop, heating independentlyTemp accuracy±2 ... (optional)vacuum systemSupport, internal vacuum pump and external vacuum penTouch screen7.0 inch, HD Resolution, ...