Exhaust temperature

The thermistor gauge on my Beta SS exhaust bend reads about 30-35 deg. depending on revs. Higher temperatures are reached after turning off the engine as heat soaks from the block.
I set the alarm at ~45 deg.
Add. The gauge is a fish-tank thermometer, about £10 from ebay.
 
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I'd go to a plumbers merchnats and get a heating thermometer - a clockface display thermometer with a spring on the back to hook it onto a pipe.

Rob.
 
I've got an ebay IR type with laser, cost about £6 IIRc. Goes up to over 100degC.
Also got some LCD panel meter types with sensors on 1m leads, cost<£5, -something to over 100C
They are good, you can glue the sensor to a surface, I've used them to monitor the pipe temps in my central heating.
You can also get proper thermocouple meters for £30 or so.
 
I installed these last season

http://www.ebay.co.uk/itm/10A-12V-D...ial_Automation_Control_ET&hash=item53ff840e06

They were about a tenner then, now down to £7.42 inc postage!
I taped the sensor to the outside of the elbow, and it works a treat giving constant readings accurate to within 0.1 deg C.

In cold weather (this Easter) running temps were around 25deg C.
In Summer, it rose to as high as 35 deg C, and at idle even higher at times.

Excellent bit of kit, looks good, easy to install, can even be wired in to activate an alarm - although beware heat soak when switching on again after stopping.

Loads of choice on ebay for similar stuff
 
Trundlebug said:
I installed these last season

http://www.ebay.co.uk/itm/10A-12V-D...ial_Automation_Control_ET&hash=item53ff840e06

They were about a tenner then, now down to £7.42 inc postage!
I taped the sensor to the outside of the elbow, and it works a treat giving constant readings accurate to within 0.1 deg C.

In cold weather (this Easter) running temps were around 25deg C.
In Summer, it rose to as high as 35 deg C, and at idle even higher at times.

Excellent bit of kit, looks good, easy to install, can even be wired in to activate an alarm - although beware heat soak when switching on again after stopping.

Loads of choice on ebay for similar stuff
Click to expand...


This seems too good to be true? Am I right in thinking that since it's a thermostat, it turns something on when it reaches a certain temperature? Like for instance a loud buzzer?

Sounds great for the money!!
 
chrisbitz said:
This seems too good to be true? Am I right in thinking that since it's a thermostat, it turns something on when it reaches a certain temperature? Like for instance a loud buzzer?

Sounds great for the money!!
Click to expand...

The user selected alarm temperature setting operates a set of relay contacts, selectable as either NO or NC. These can be used for anything you like.
 
Perfect....just ordered one.

Not sure if that probe would be ok in the exhaust so how about bonded to the outside?
 
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Trundlebug said:
I installed these last season

readings accurate to within 0.1 deg C.
Click to expand...

I appreciate that this is irrelevant in measuring exhaust temperature, but please don't delude yourself, the accuracy is at best 1 degree, the resolution on the controller is 0.1 degree. Still very useful at that price, though too power hungry for a many a sailing boat.

Rob.
 
I attached my sensor to the exhaust elbow with a jubilee clip. Used Maplin mini siren on contacts from aquarium monitor runs @ 26 deg with engine on load. ( Lombardini engine)
 
davidjackson said:
Given that it's advertised to measure body temperature I imagine that it may have a restrictive range.

A quick search found this from Amazon, not a lot more expensive. I've had something similar for several years, bought from Maplins for about £30 and it's quite a handy tool to have.


http://www.amazon.co.uk/Infrared-Digital-Thermometer-Laser-Sight/dp/B003CIA6Y2
Click to expand...

Got that thermometer and its a must have toy. Loads of uses other than the boat.Highly recommended.
 
rob2 said:
I appreciate that this is irrelevant in measuring exhaust temperature, but please don't delude yourself, the accuracy is at best 1 degree, the resolution on the controller is 0.1 degree. Still very useful at that price, though too power hungry for a many a sailing boat.

Rob.
Click to expand...

I agree it's probably not accurate to within the displayed 0.1 degree, however I'm sure it'll be better than 1 deg.
Don't go thinking it's power hungry, it uses about 0.1 amp, and remember is only used when the engine is running (and the battery is being charged) anyway.
Even for a saily boat, that's more than acceptable.
 
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