Anyone know off hand the resistance of the head water temp sender at cold and at 100c? Trying to beat a part number out of Tridon but it's like pulling teeth.

The only information I have comes from 60s service bulletins.

For a sender with the part # : 97M4 TT3802/00

The following was given :

50°C : 207-264 ohms @ 1mA test current
100°C : 41.4-48 ohms @ 1mA test current

Whether this matches your sender I don't know, but at least it should give you a rough guide?

cheers,

Jacob

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'72 Clubman Van - 1022cc, 295 head, 731 cam - Daily Driver
'69 Morris 1100 S - Dinged by a bus, in shed under repair
'64 Morris 1100 - Early 1100, long term project

Thanks for that. If I could find my &*^%ing multimeter I'd check an old one I have here......

Temperature vs resistance for mini with voltage stabiliser

C (20 deg C) 240 ohm
N (85 deg C) 65 ohm
H (100 deg C) 19 ohm

Thanks for that.

Found my meter - either it's crap, or these are odd-ball senders, or I don't know what I'm doing....getting really weird results.

I have 2 senders here, both came out of mini heads:

First one is reporting over 600ohm at room temp, down to 70 at 100degrees
Second one 2.4k ohm, down to 400ohm at 100 degrees.

I guess I just give the Tridon guy the numbers provided above (you guys, not mine) and see what he says...

Well how bizarre.....

Tridon guy tells me the closest he has to those figures is a TTS010, which is a 3/8 thread. Gave me the figures for the TTS029 which aren't right (but is at least a 5/8 thread), and then says he doesn't have any info n the TTS027, which is the 5/8 one that physically looks right! Noice service....

Cant help with Tridon part number, but this link http://www.theminiforum.co.uk/forums/index.php?showtopic=58241

says these were the various sensor used:

GTR102 TRANSMITTER, water temperature 1961-64.
GTR104 TRANSMITTER, water temperature 1964-69.
GTR101 TRANSMITTER, water temperature 1969-85

On Ebay http://cgi.ebay.com.au/Temperature-Sender-Sensor-MGB-Mini-Morris-GTR101-/200593615903?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2eb44fac1f#ht_500wt_949

GTR101 is listed as:
Thread; 5/8" UNF (18TPI). Resistance range (standard for Smiths instruments); 800 Ohms at 20C to 50 Ohms at 90C.

Jim

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'68 Morris Mini 1310 A+ (Now Sold!)

karcraft list a part number of 52710, which crossreferences with another part number on the minisport SA website. Chase that one down

Is there a reason you need or want to use the Tridon one? Have you tried hooking it up and seening what it does? You can always test it on the bench, with your gauge and some boiling water.

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Not not Tridon specifically, I was just trying to see if it was possible to source one locally rather than Aus. Tridon seems be be a brand that most suppliers can at least cross reference to, that's why I started there. It was supposed to be a 5 minute look

Given that there seems to be several versions of the truth I will go ahead and bench test the ones I have with water and the gauge I intend on using. Don't have a running engine to use just now. The only issue is all three gauges I have found have the connector snapped off....