Yes and BTW it is a nice idea to have an external (not immersed in coolant) temp gauge on any engine as an added security. In fact many immersed sensors fail to indicate overheating in case of fresh coolant rapid loss since they need the (overheated) coolant to register any overtemp situation. So they work well in case of seawater blockage but sometimes fail to account for fresh water loss. In the latter case a dry sensor bolted on a hot spot (usually the head) is better. Of course an exhaust pyrometer is even better but expencieve.

I also want to emphasize the need to have separate, analogue, and reliable gauges for at least water temp and oil pressure and not mix them up into multi displays etc. An audible alarm is also really a must since a stressed diesel can overheat in about a minute if left without coolant.

Hope this helps.