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profqwerty - n/a
8-Feb-06, 11:21 AM
I'm currently doing ASlevel Electronics, and am building an EGT gauge for my hovercraft (rotax 447). Does any one have any suggestions of sources for these, and (more importantly), the specs of them (resistance/temp, etc), as I cannot find any data sheets.

Thanks for any help,

Toby

Nick Long - n/a
8-Feb-06, 11:34 AM
The sensor/sender end is pretty much universal. Water temp guages tend to be resistance type but EGTs and CHTs (cylinder head) are more likely to be voltage generating. Do a search on thermocouples, or if you have access to an RS account, you may be able to get suitable data sheets from their web site.



Nick

team black - n/a
8-Feb-06, 11:48 AM
I think the j type thermocouple is used for egt, see the link

http://www.picotech.com/applications/thermocouple.html

Superwedge - n/a
8-Feb-06, 01:32 PM
Egt senders/sensors are normaly K type

I use digital ones produced in sth Africa buy them from www.mcp.com.au

I have seen resistor values on the web try searching for testing EGT gauges or diagnosing I think thats how i turned up the values last time i was having problems. http://hovercraft.org.uk/images/icons/smiley_icons/icon_confused.gif

Tony.W

profqwerty - n/a
9-Feb-06, 02:50 PM
OK, thanks for the info so far

I have digested the pico site, and it seems to be relatively simple to rig up, except for the connections. It's pretty different to how I imagined it would work (thermistor). anyone with experience with these I would welcome any advice/tips...

Toby

BIGRACING - n/a
10-Feb-06, 04:48 AM
.... anyone with experience with these I would welcome any advice/tips...

Toby


Try Westach,(www.westach.com), part number 712-2DWK EGT Thermocouple 48" Type K 2.5 ohms res., 0-2100f, 32.9mv. Here is a link to a picture: 712-2DWK-Clamp_Type_EGT_Probe (www.westach.com/images/showcase/712-2DWK-Clamp_Type_EGT_Probe.jpg)

All you need to install this is to drill a 3/16th inch hole about 4 to 8 inches away from the flange. No batteries required, this unit is self powered, just connect the wire plugs into the gauge.

This company also has many types of EGT Gauges (www.westach.com/images/showcase/2C2W-EGT.jpg) available, some of them are dual and triple combination gauges.



Hope this helps?

profqwerty - n/a
10-Feb-06, 12:31 PM
Yes it does.

I've got the new type exhaust manifold with the predrilled and tapped holes in, so should be pretty easy to fix together. I'm going to make the receiver unit myself, as this would be a lot cheaper, although it will have to have batteries.

Toby