Hey there folks, I was looking for a fuel sender unit that would have some electronics that can be set to tell the unit at what level it should read given a known amount of fuel.
Not many of our fuel tanks have a square profile, thus strictly using the float level may indicate 1/4 tank when if fact you may have way less.
I have very good senders now from WEMA, but they're still sending a resistance between 33-240, via a nifty float design.
I thought there was one out there that could be calibrated at certain intervals once while filling an empty tank for the first time. Say you have a 55 gallon tank. Pour in 13.75 gallons and set the resistance to 84.75 or whatever setting to read 1/4 tank, then pour in another 13.75 gallons and set the resistance to 136.5 or what ever setting to get the gauge to read 1/2, pour another 13.75 gallons and set the resistance to 188.25 or what ever setting to get the gauge to read 3/4 and finally pour the remaining 13.75 gallons and the gauge should be on 4/4 and resistance should be 240ohms.
I found a fuel gauge, Cruzpro Fu30, that takes a signal from a regular sender and does a similar operation with an empty tank , setting various resistance points equal to a known amount of fuel up to 20 times.
So figuring I have a 55 gallon tank, I could calibrate the gauge for every 2.5 gallons of fuel. This unit would be VERY accurate, but the bloody thing cost over $180.00 US. Idealy I would need two of them, but seeing that my two tanks are the same shape I could get by with one and use a toggle switch to monitor the fore and aft tanks.
The unit does figure out fuel consumption, how much time left in the tank at the current rate of consumption and other neat things. I'm guessng there is an internal clock, and it must poll the tank level every second or every other second. I don't believe those features could be as accurate as the fuel flow meters such Floscan and navman f2100. But it does sound nifty.
if any one knows of a sender that can be calibrated for irregular tanks let me know.
Not many of our fuel tanks have a square profile, thus strictly using the float level may indicate 1/4 tank when if fact you may have way less.
I have very good senders now from WEMA, but they're still sending a resistance between 33-240, via a nifty float design.
I thought there was one out there that could be calibrated at certain intervals once while filling an empty tank for the first time. Say you have a 55 gallon tank. Pour in 13.75 gallons and set the resistance to 84.75 or whatever setting to read 1/4 tank, then pour in another 13.75 gallons and set the resistance to 136.5 or what ever setting to get the gauge to read 1/2, pour another 13.75 gallons and set the resistance to 188.25 or what ever setting to get the gauge to read 3/4 and finally pour the remaining 13.75 gallons and the gauge should be on 4/4 and resistance should be 240ohms.
I found a fuel gauge, Cruzpro Fu30, that takes a signal from a regular sender and does a similar operation with an empty tank , setting various resistance points equal to a known amount of fuel up to 20 times.
So figuring I have a 55 gallon tank, I could calibrate the gauge for every 2.5 gallons of fuel. This unit would be VERY accurate, but the bloody thing cost over $180.00 US. Idealy I would need two of them, but seeing that my two tanks are the same shape I could get by with one and use a toggle switch to monitor the fore and aft tanks.
The unit does figure out fuel consumption, how much time left in the tank at the current rate of consumption and other neat things. I'm guessng there is an internal clock, and it must poll the tank level every second or every other second. I don't believe those features could be as accurate as the fuel flow meters such Floscan and navman f2100. But it does sound nifty.
if any one knows of a sender that can be calibrated for irregular tanks let me know.