: Selectable for analog output (4–20 mA), external input, or additional control output. KEYENCE CORPORATION OF AMERICA 3. Operational Features Sensor Main Unit 25A/32A Type - FD-Q32C - Keyence
Calibration ensures accuracy. According to the FD-Q32C manual, you should recalibrate every 12 months or after any major electrical event (surge, short circuit).