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Old 01-24-2012, 11:36 AM   #1
Hobz
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Default Interest in group order for Omori oil temp replacement sensors

I have an Omori oil temp gauge without a sensor so I have been doing some research for a replacement sensor. Omori didn't use a standard temp sensor for their gauge, so I have found a place that would make a sensor, but I would have to order more than one.

These gauges are old now, and pretty rare, but I figured I'd ask around if there was any interest in replacement sensors for these units.

I'm currently leaning towards something that would fit in a 1/8NPT hole, with a 1" probe.
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Old 01-24-2012, 02:55 PM   #2
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I may be intereted. I'd like to see more info. The probe on the OEM plug doesn't protrude into the pan it's pressed into the plug. Any idea on cost?
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Old 01-24-2012, 03:31 PM   #3
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I hooked up a pot to the sensor leads on the gauge to determine what Ohms/F it is used to seeing. By doing this, I have determined that it is expecting the signal from a pt1000 RTD. This isn't a totally common RTD element, they tend to be pt100, but that would be too easy.

I have found a place that can insert a pt1000 sensor element into their regular pt100 water/oil temp sensor that has 1/8NPT, and they offer short or long probe versions. They'll get back to me next week about what they can do for me.

This is the company: http://www.auberins.com/index.php?ma...roducts_id=134

I will be putting this into a sandwhich plate over the filter, so 1/8npt is convenient for me.

Oh, and by the way, I installed the Killer B Oil pan, pickup and windage tray last week. Amazon does sell a pt1000 sensor for $14, that together with a 1/2 NPT thermowell (which the store also sells), would fit perfectly into that 1/2" NPT sensor hole you guys put in the oil pan

sensor:
Amazon.com: Solar Water Heater Collector Temperature Sensor pt1000: Industrial & ScientificAmazon.com: Solar Water Heater Collector Temperature Sensor pt1000: Industrial & Scientific
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Old 01-24-2012, 04:05 PM   #4
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It would be interesting to see a side-by-side plot of these 2 sensors to verify operation of the gauge.

So far I like what I'm hearing!
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Old 01-24-2012, 06:34 PM   #5
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Quote:
Originally Posted by KillerBMotorsport View Post
It would be interesting to see a side-by-side plot of these 2 sensors to verify operation of the gauge.

So far I like what I'm hearing!
Which two sensors? OEM vs. Omori? Amazon vs. Auber?

OEM should have a calibration profile to compensate for any non-linearity in the sensor output, but I guess you can't count on that.

The amazon and Auber sensors should perform identically, apart from their placement in the system, and their time constants might be different, but nothing that would affect oil temp readings. They might use different class sensors, but it should still be within 1C of each other.
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Old 01-24-2012, 06:39 PM   #6
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Another approach is to use compression fittings and a standard, non-threaded probe which would be far easier to obtain. However, I'm not comfortable with compression fittings in a system as important as this.
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Old 01-24-2012, 09:17 PM   #7
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^ agreed. My preference would be 1/8NPT. I could even make an OEM plug with the NPT threads if there was interest.
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Old 02-24-2012, 01:21 PM   #8
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Update: Omega.com has quoted me $64 for a sensor. They will essentially replace the pt100 element in one of their COTS sensors with a pt1000 that is needed for the Omori gauge. I'm kicking myself for not talking with them sooner.

You can't order it through their website, you have to e-mail their customer service, but the effective part number is: RTD-NPT-72-E-1/8-MTP-1000 OHMS

This is
the part it is based on:
http://www.omega.com/Temperature/pdf/RTD-NPT.pdf

Features:
1/8NPT with 1/2" probe (A little shorter than I'd hoped, but beggars can't be choosers)
72" long, 2-wire strain relieved, PFA insulated, SS braid protected cabling (The Omori wiring seemed to have 3 wires, but based on testing it only uses two of the wires, which is pretty typical for an RTD. RTDs with more than 2 wires are typically used for super high accuracy readings)


I'll follow up with testing to make sure everything works as it is supposed to.
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Old 03-15-2012, 02:43 PM   #9
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Tested probe in 150F water and it works, at least as far as my cooking thermometer can tell.

The probe I got had three wires, one red and two black, but that's okay, the extra black is just for extra accuracy if your gauge has that functionality, but since the Omori gauge doesn't, I just connect the blacks together.

Anyway, so now we know there is a $65 replacement probe for the Omori Oil temp gauge. Hopefully someone else will get some use out of my research.
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Old 03-15-2012, 03:48 PM   #10
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So you're just ising a single wire like the factory?
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Old 03-15-2012, 04:07 PM   #11
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Quote:
Originally Posted by KillerBMotorsport View Post
So you're just ising a single wire like the factory?
No, the Omori gauge is a two wire gauge, so the red and black wires hook up to the red and grey wires going to the gauge.
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Old 04-08-2012, 03:03 PM   #12
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Quote:
Originally Posted by Hobz View Post
Update: Omega.com has quoted me $64 for a sensor. They will essentially replace the pt100 element in one of their COTS sensors with a pt1000 that is needed for the Omori gauge. I'm kicking myself for not talking with them sooner.

You can't order it through their website, you have to e-mail their customer service, but the effective part number is: RTD-NPT-72-E-1/8-MTP-1000 OHMS

This is
the part it is based on:
http://www.omega.com/Temperature/pdf/RTD-NPT.pdf

Features:
1/8NPT with 1/2" probe (A little shorter than I'd hoped, but beggars can't be choosers)
72" long, 2-wire strain relieved, PFA insulated, SS braid protected cabling (The Omori wiring seemed to have 3 wires, but based on testing it only uses two of the wires, which is pretty typical for an RTD. RTDs with more than 2 wires are typically used for super high accuracy readings)


I'll follow up with testing to make sure everything works as it is supposed to.
Perfect, I'm in the same boat with the missing sensor. Thank you for the info and research.

Cheers,
Rob
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Old 04-11-2012, 09:28 AM   #13
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Quote:
Originally Posted by STirish View Post
Perfect, I'm in the same boat with the missing sensor. Thank you for the info and research.

Cheers,
Rob
Great to hear! I was hoping others would be able to benefit from all the hair pulling I did finding a replacement sensor!

So far, so good. Sensor hovers in the 190-220F range, depending on load, when the car is up to temp.
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Old 04-11-2012, 04:32 PM   #14
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Just throwing it out there...I recently sourced a replacement probe for my EGT gauge from The Sensor Connection, absolutely great price, product, and service. May want to peruse their website to see if they make something that will work for you all.
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Old 04-11-2012, 04:36 PM   #15
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Quote:
Originally Posted by Seahawk View Post
Just throwing it out there...I recently sourced a replacement probe for my EGT gauge from The Sensor Connection, absolutely great price, product, and service. May want to peruse their website to see if they make something that will work for you all.
That is actually where I got my EGT sensor for my Omori EGT gauge from . Great price and works perfect.

I asked a bunch of custom sensor places for oil temp sensors that would work, but in the end Omega was cheapest, lowest lead time, and simplest to order from.
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Old 09-01-2012, 12:48 PM   #16
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Quote:
Originally Posted by Seahawk View Post
Just throwing it out there...I recently sourced a replacement probe for my EGT gauge from The Sensor Connection, absolutely great price, product, and service. May want to peruse their website to see if they make something that will work for you all.
Do you have a link to this product, or any other info on it?

I had a replica probe made up by one of Kenworth's suppliers, but having more than one source for the Omori sub-cult would be ideal.

http://forums.nasioc.com/forums/show...ighlight=omori
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Old 09-04-2012, 04:28 PM   #17
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I searched around for a while and from what I understand most EGT gauges use a "type K thermocoupler" which is what this is. Same NPT fitting thread pitch as what my EM was already tapped for. I used this to replace the probe for my GReddy EGT gauge.

http://thesensorconnection.com/egt-p..._fitting.shtml
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Old 02-10-2013, 01:09 PM   #18
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I am also looking for Omori sensors. I am in need of a boost pressure, and oil pressure sensor. Any ideas?
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Old 02-10-2013, 02:41 PM   #19
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Closing this old thread.
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