coverting a tm2 to read coolant temperature

[veebug74]

maybe i should of just stuck with the mason alarm and re calibrated guage which came with the van
Bought a tm2 combined with low coolant alarm,disapointed that it doesnt read actual coolant temperature.So with all the thermistor kits,and rad hose splicing kits available is it possible to chop and replace the sensor .Haydens away so thought id ask here.

[helen&tony]

Hi
As it says in the 'structions, you can bolt the sensor to the thermostat housing, or strap it to a hose with tape.....the choice is yours where you put it....it reads temperature wherever you put it
Cheers
Helen

[dobby]

I'm sure there's a thread about mounting the sensor on the back of the head. I don't have a TM2 but use a Mason Alarm, an LCA from Haydn and a K Type thermometer with the probe on the back of the block.

see this:

http://www.igmaynard.co.uk/bongo/forum/ ... or#p346713

[haydn callow]

It should be a simple enough job to remove the "supplied" sensor (it just has a simple sensor epoxyed inside it) and splice a replacement sensor.
I will look into it for you.

I think it is plain enough in the sales "blurb" what you are buying.

[veebug74]

plain and simple,
To be fair didnt read bumf just read coolant alarm and assumed it was that, ie with a sensor in water.
I shall search for sensor location threads ,before the fun police arrive

[dobby]

I shall search for sensor location threads ,before the fun police arrive

This thread should help? as per above

viewtopic.php?f=3&t=35349&p=346713&hilit=+sensor#p346713

[mikeonb4c]

plain and simple,
To be fair didnt read bumf just read coolant alarm and assumed it was that, ie with a sensor in water.
I shall search for sensor location threads ,before the fun police arrive

Can produt be returned in packaging for refund? Worth asking Haydn as he's pretty good on stuff like that - he likes customers to be satisfied. I can see how its easily done!

If you do decide to proceed, worth PMing The Great Pretender as he has talked about coolant immersed sensors and where best to put them (he has done it on his). He knows his stuff on engines and has done this to his.

[veebug74]

plain and simple,
To be fair didnt read bumf just read coolant alarm and assumed it was that, ie with a sensor in water.
I shall search for sensor location threads ,before the fun police arrive

Can produt be returned in packaging for refund? Worth asking Haydn as he's pretty good on stuff like that - he likes customers to be satisfied. I can see how its easily done!

If you do decide to proceed, worth PMing The Great Pretender as he has talked about coolant immersed sensors and where best to put them (he has done it on his). He knows his stuff on engines and has done this to his.

Ta mike ,i will find a solution

[haydn callow]

Some info..

The TM-2 uses a 3 wire sensor

The difference between a thermistor & a 3 wire temp sensor is this:
Thermistors are simply resistors which change their value in relationship to temp (non linear)
They all vary a bit as to their initial resistance, can be several hundred ohms difference at the same temp
This means the circuit has to be adjusted or calibrated manually.
Fiddly and time consuming.
They are usually used in analogue circuits.

A 3 wire sensor has a supply voltage applied to it and outputs a set voltage in a linear fashion.
Can be 10mv/*C, or 6.6mv*/C for example, but it is linear.
They are usually used in digital circuits with a microprocessor.

[veebug74]

Some info..

The TM-2 uses a 3 wire sensor

The difference between a thermistor & a 3 wire temp sensor is this:
Thermistors are simply resistors which change their value in relationship to temp (non linear)
They all vary a bit as to their initial resistance, can be several hundred ohms difference at the same temp
This means the circuit has to be adjusted or calibrated manually.
Fiddly and time consuming.
They are usually used in analogue circuits.

A 3 wire sensor has a supply voltage applied to it and outputs a set voltage in a linear fashion.
Can be 10mv/*C, or 6.6mv*/C for example, but it is linear.
They are usually used in digital circuits with a microprocessor.

thx