All_at_Sea
Active member
Mine has stopped working so l don't know if it's the sensor or the gauge? How do l test them? I do have an electrical tester onboard but are these things testable in situ?
Perkins 4236 temperature sensor test
- Thread starter All_at_Sea
- Start date
rotrax
Well-known member
Hi, these sensors invariably work by allowing current to earth as the temp. increases. Join your tester on OHMS, one lead to each terminal when cold and mark the reading-should be infinity. Now drop into a pan of water,still connected and watch what happens as it gets hot.It should make a circuit from a reasonable resistance when warm to very little resistance when really hot. Hope this helps.
David2452
Active member
Generally speaking, European coolant sensors will read about 280ohms @ 40c / 70ohms @ 80c and 20ohm @ 120c. U.S. ones, like their other senders have different values.
