Melting Point Apparatus LDMP-A20 Labtron Melting Point Apparatus features PID microprocessor temperature control, high-definition video and automatic detection for accurate, reliable results. With a temperature range from room temperature to 350°C, it automatically detects sample color changes and is equipped with USB, Wi-Fi, RS232 and tamper-proof functions. An 8-inch HD screen provides a clear view of the melting process in real-time.