Does anyone know where i can find a temp sensor that has a 0 to 5 volt output that's suitable to be installed on water?
I would like to be able to log pre and post my heat exchanger for my water to air intercooler system and have not had much luck.
From what i can find i would need a IC temperature sensor as they have a linear output but i have not been able to find one that would work for what i need.
Something like this would be perfect
Temp sensor with voltage output
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Temp sensor with voltage output
Last edited by 0081(2) on Thu Nov 13, 2014 9:14 pm, edited 1 time in total.
- antus
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Re: Temp sensor with voltage out put
Why not set up an '808 on the bench with a stock coolant sensor and log it with tuner pro? even if you remove the sensor you can use the curve map from a stock tune.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
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Re: Temp sensor with voltage out put
Hey antus.antus wrote:Why not set up an '808 on the bench with a stock coolant sensor and log it with tuner pro? even if you remove the sensor you can use the curve map from a stock tune.
I dont quite follow how that would work for what i need.
Im using a flash PCM from a V6 VY and have limited inputs to use which are only 0 to 5 volts and i wish to log the temps when driving.
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Re: Temp sensor with voltage out put
I think what antus means is if you connect it to the 808 you can see what volts = certain temps so you'll know what settings you need for it to display correctly
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Re: Temp sensor with voltage output
I was under the impression that the stock sensors are a restive type sensor not a voltage sensor ??
I thought as a general rule a 2 wire sensor was a resistance type and you needed a 3 wire sensor for voltage output sensor (power, ground and output.)
I thought as a general rule a 2 wire sensor was a resistance type and you needed a 3 wire sensor for voltage output sensor (power, ground and output.)
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Re: Temp sensor with voltage output
I would have thought it would have worked, but I admit I havnt looked at the wiring. I thought you were homebrewing the electronics and/or just looking for a way to measure temp as you didnt mention the pcm.
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Re: Temp sensor with voltage output
A normal resistive temp sensor is converted to a voltage by using a pullup resistor of a known value and a stable voltage reference.
Take the tables from 11P for coolant sensor calibration... There are two tables as the PCM switches the pullup resistor due to the extremely non-linear resistance of the sender depending on the coolant temp. The ADC counts is the raw data your analog input would read, then in TunerPro you can enter the table values for it to interpolate from to get degrees C.
The water temp you want to measure will decide the pullup resistor value, if its going to be below 60 odd degrees go with 3840 ohms (3900 ohms is closest in your common values without resorting to a trimmer pot or more expensive resistor for an exact value).
Use the TPS 5V as your stable voltage source and you will have a nice accurate temp reading using the factory calibration data
The Ecotec coolant sender is a little different if you use that...
Take the tables from 11P for coolant sensor calibration... There are two tables as the PCM switches the pullup resistor due to the extremely non-linear resistance of the sender depending on the coolant temp. The ADC counts is the raw data your analog input would read, then in TunerPro you can enter the table values for it to interpolate from to get degrees C.
The water temp you want to measure will decide the pullup resistor value, if its going to be below 60 odd degrees go with 3840 ohms (3900 ohms is closest in your common values without resorting to a trimmer pot or more expensive resistor for an exact value).
Use the TPS 5V as your stable voltage source and you will have a nice accurate temp reading using the factory calibration data
The Ecotec coolant sender is a little different if you use that...