low coolant alarm

Been after one for ages.

Seen this on eBay, but I have also seen a few critical threads about this type on .org:

Low Coolant Alarm for MGF & TF Spot Water Loss Stop HGF Completed

Is this type worth getting?

Not bad value really!

The parts to make your own like I did are probably £40-£45. If you want to go that route I can show you how to fit it up next week.

In fact I've got a spare 'broken finger' sensor, as I had to buy three(minimum order).

That sounds like a plan David - TYVM

Whatever you decide..
Don't wait to long. The earlier you get in any, the better it is.
I've bought my self the original sensor and coolant expansion tank when it got available. Added a simple low power buzzer without any delay. Not the very best solution cause it's to sensitive and sounding in nearly each fast driven LH corner

Anyway, there's a company based in the UK, GENTECH.
They do level sensors and some guys at the German Forum have used the Gentech sensor type LS303-51. Drill hole and add to the expansion tank side wall.
http://www.gentechsensors.com/content/product/ls304-51n (Not the 303 but 304 shown !)

Should be available from shops like Farnell etc.
http://www.gentechsensors.com/
May be worth a try cause the sensor itself is for high temperature (105°C) and costs about 20 quid only and seams to be very reliable. (5W output load) Some electronic delay circuit and buzzer to be added though.

I've no relation to that company. Just to show another option.

This is the one I use.



EDIT Just realised its the same one as yours Dieter, but only £7.54 +vat and postage.

David Aiketgate wrote: ......
EDIT Just realised its the same one as yours Dieter, but only £7.54 +vat and postage.

and the right p/n aswell LS303-51N
btw. In DE its available at Conrad

Hi Dieter,
I have also got the same expansion tank as you but used an extremely loud double buzzer but as you say it is too sensativeThe DRM1 delay unit cannot be wired in any configuration to give an overriding delay.Mine is that sensative that it activated reversing off the drive,so quickly took the inline fuse out.
I have tried unsuccessfully to contact various electronics companies to see if they manufacture the correct delay on relay but have had no replies as yet..I also thought about raising the coolant level by possibly 10mm to see if this would help but really need to source a compatible delay on unit as the expansion tank switch is very sensative.
Regards Neil

I picked up the standard one from Rimmer Bros but have yet to fit it.

I got the B&G unit. Easy install, works well, no false alarms.

Of course it's more reliable to using kits from trustful suppliers. No daubt.

But for the gamblers :silly: ...
Neil, see at tony's site. He's a retured engineer for electronics and built this device

http://www.apttony.co.uk/Servicing/CoolantAlarm.html
May be you can find someone who could do it for you.

Thanks Dieter,
Definately would have to get someone to build it for me,electronics are not my forte.I would have thought that there were lots of forum members out there who have made their own alarm and using the later bottles.
Regards Neil

Neil, this is a quick(shaky) circuit diagram of what I was suggesting. Adding a relay into the standard drm wiring diagram.

This converts the oem sensor signal (make to earth) into the same signal as the broken finger type( break earth) signal.