Thread: some interesting engine monitoring products

I have used Flexible Drive Agencies low coolant alarm in several LR applications, most recently Disco 1 Tdi. I silver solder a socket to accept the probe into the radiator just beneath the top hose. The expanding type grommet probe does not work well in the coolant tank - suspect under pressure, especially if steam becomes involved.

Works very well.

Pete

I use the datatron low level coolant alarm wired to a 1991 RR Vouge pressure cap. Works a treat.

I note some previous threads suggest that coolant loss probes shouldn't be placed in the top hose as coolant can still be flowing through these even as the radiator level is dropping.

I think it is unlikely that full flow in the top hose would be achieved if the rad is dropping it's coolant level.
As soon as there is an air gap & the sensor tip is exposed it would sound the alarm.

I refer to those of us who have had minor "air in the system" problems after fitting the sensor.

The thing always sounded a longer nuisance alarm until all the air was purged & it was surrounded by coolant.

anyone remember how much the sensor was?

Kit was about $110 to trade. Sensor, mounting ferrule, wiring instruction and monitor. I got a small red warning lamp from Jaycar or DSE to install in switch panel near dash for visible warning to go with audible alarm from monitor, about $3.


HTH

Pete

Originally Posted by HangOver

anyone remember how much the sensor was?

The sensor is the most expensive bit of the whole kit. I paid $115 for my kit (Datatron) then didn't use it, instead opting for the 91 RR Vouge cap (@ $125+) from Cooper automotive. Its an expensive solution but I've not compromised the cooling system in anyway.