Check here for a digital or mechanical Sender or Gauge to help you monitor your engine's vital parameters like water or oil temperature, or a pyrometer for exhaust temps. We carry the best lines of such sensor instruments from CruzPro, VDO, Moeller, and Stewart Warner, to also include oil or hydraulic pressure, or fuel or tank level, or a tachometer, hour meter or rudder angle indicator. Look here too for Detection Alarms and Senders for many of these instruments.