Multiple sensors to a single gauge? Can it be done?

[chuntag95]

I really want 3 SPA gauges, but my overhead console only has room for 2. Has anyone run multiple sensors to the same gauge and switch back and forth? I want to be able to check my Oil temp and Transmission temp, but want Oil pressure too. Any experience, ideas or other input would be appreciated.
Chris

[ratlover]

I've done it with a switch in there to swap between em.

Tranny temp and a oil temp was my application.

As long as it is simmilar temp ranges and senders you will be golden.

[SoCalDMAX]

I've got 3 temp senders (engine, tranny and diff) switched to one SPA gauge, works fine.

There are 3 wires to each sender, positive, GND and signal, so I used a rotary switch and switched all 3 at the same time. It might be possible to leave the positive and gnd "on" to both senders and merely switch the signal, but I didn't experiment.

Regards, Steve

[chuntag95]

Steve,
You are my Hero! :D That is exactly what I want to do! Do you have a part number for the switch? Where did you mount the switch? Also, where did you get your extra sensors?
Thanks,
Chris

[SoCalDMAX]

Chris,

Unfortunately, here's the part where the cape falls off. ;) I bought the senders directly from SPA, pretty cheap but make sure they come with the pins and connector to plug into.

The rotary switch I purchased from a surplus elect. store locally, no PN on it. You should be able to find what you need online at mouser, digikey, allied, etc. Just look for a 3 position or greater 3 wafer switch.

Regards, Steve

[chuntag95]

Where did you mount your switch?
How long did it take to get the sensors from England? Did you call to get the other side of the connectors?
Chris

[chuntag95]

I emailed SPA in the US. I asked about getting some connetors and switching between probes. In his first email, the guy said people do it all the time, but it will void your warranty! :eek: I responded that I knew that and that is why I wanted to build a switching box with the proper connectors. Also, if people do it all of the time, then why not offer it as an accessory. His response was Never. :rolleyes: I figure they could sell a 3 or 4 sensor switchbox with leads and sensors for a pretty good price. The won't loose money anyway. I am looking for a source for the connectors now. If I find one, I'll post. If I don't then I will just cut those little suckers off and wire it up.

Hey John, got a new product for you! :D

[RichBailey]

Chris,
No problem. Check out www.westach.com (http://www.westach.com) They make gauges and switches for the aviation industry. They have the switch you are seeking.