Release 4 of the Smartdac+ GX series panel-mount-type paperless recorder, GP series portable paperless recorder and GM series data acquisition system offers three functional enhancements. A high-speed analog input module for high-speed sampling enables intervals as brief as 1 ms. A dual-interval function allows for simultaneous data collection on slowly changing signals (e.g., temperature) and quickly changing signals (e.g., pressure and vibration). A PID control module lets users control and record critical process data in one system. The Smartdac+ can control, monitor and record up to 20 loops. A four-wire RDT/resistance module helps increase temperature measurement precision.